Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.