Diagnosis and prevention of the mid-crop mortality syndrome of pond-reared black tiger prawns (Penaeus monodon)

Project number: 1996-301
Project Status:
Completed
Budget expenditure: $423,716.00
Principal Investigator: Ian Anderson
Organisation: Department of Primary Industries (QLD)
Project start/end date: 8 Aug 1996 - 28 Nov 2003
Contact:
FRDC
TAGS
Mortality
Invasive Species
Husbandry
Food Safety
Disease

Objectives

1. To refine the detection system (hybridisation and PCR) to ensure the best sensitivity and specificity for a test to detect the MCMS agent
2. To clearly identify the risk factors which aggravate the expression of clinical MCMS, including the role of blue green algae
3. To establish a model screening program which allows hatchery and farm production with virus-free prawns
4. To deterine a cost effective, environmentally sensitive disinfection program to eradicate the MCMS agent from farms and hatcheries which will be a model for future disease emergencies

Final report

ISBN: 0 7345 0145 5
Author: I.G. Anderson and L. Owens
Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Final Report • 2001-05-01 • 6.82 MB
1996-301-DLD.pdf

Summary

The project has created knowledge which has led to the outcome of better health management on Australian prawn farms. Changes to farm practices have occurred where whole-farm destocking and pond disinfection are applied as a hygiene practice following a season where crop declines or failures are seen. During, and subsequent to, the project prawn farmers now understand that infectious disease can affect cultured marine prawns in earthen ponds. As a consequence many farmers will submit sick prawns for diagnostic analysis soon after stressed prawns are seen in ponds, not assuming the problems are due to pond environment factors.

The project has contributed to the recovery of the Queensland prawn farm industry from the low production seen in the 1995/96 season of 1,294 tonnes (worth $28.2m) to 1855 tonnes (worth $32.4m) reported in 1998/99. A similar outcome is reflected when Australian marine prawn production is considered; from a low of 1,400 tonnes in 1994/95 to 2,059 tonnes of production in 1997/98.

The project has shown that a virus associated with Mid-Crop Mortality Syndrome is passed from breeders to their progeny. The project has created the knowledge of a detection test and that application of that test can be used by hatcheries to reduce the effect of the virus on productivity in the hatchery and farms.

Rock Lobster Post Harvest Subprogram: physiological studies of stress and morbidity during post-harvest handling and storage of western rock lobster (Panulirus cygnus)

Project number: 1996-344
Project Status:
Completed
Budget expenditure: $355,444.00
Principal Investigator: Louis Evans
Organisation: Curtin University
Project start/end date: 27 Jun 1996 - 6 Jan 2005
Contact:
FRDC
TAGS
Post Harvest
Physiology
Mortality
Harvest Strategy
Disease

Objectives

1. To identify suitable immune system parameters which can be used to evaluate stress reponses and health status in captive lobsters and to apply those parameters in a study of stress induced by post harvest handling procedures.
2. To investigate the causes of mortality in captive lobsters held in processing factories. This study will focus on bacteriological and histopathological examinations and will result in the development of a standard protocol for autopsy of lobsters.
3. To evluate the influence of temperature change on immunological and physiological stress reponses.
4. To study the influence of hormonal secretions on immunological and physiological stress reponses.
5. To investigate innovative techniques which will boost immunocompetence but not adversely affect marketability of live product.

Final report

Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf
Final Report • 2017-09-29 • 5.94 MB
1996-344-DLD.pdf

Rock Lobster Post-Harvest Subprogram: physiological studies of stress and morbidity during post-harvest handling and storage of western rock lobster (Panulirus cygnus)

Project number: 1996-345
Project Status:
Completed
Budget expenditure: $699,193.00
Principal Investigator: Brian Paterson
Organisation: Department of Primary Industries (QLD)
Project start/end date: 28 Jun 1996 - 19 Jan 2002
Contact:
FRDC
TAGS
Post Harvest
Physiology
Mortality
Harvest Strategy
Disease
SPECIES
Western Rock Lobster
Southern Rock Lobster
Tropical Rock Lobsters

Objectives

1. Identify key physiological stress parameters that either describe stress levels and/or predict likely further mortality in lobsters after harvest and apply these parameters in studies aimed at improving post-harvest handling practises. This overall objective will be achieved by...
2. (Sub-objective 1) Obtaining baseline measurements of physiological parameters in resting undisturbed lobsters, with reference to interactions between season and locality and the effects of moult stage and other biological variables
3. (Sub-objective 2) Identifying physiological parameters, through field studies aimed at studying the effect of harvest and post-harvest handling on lobsters, which can be used to evaluate deviations from baseline values (stress responses) in captive lobsters.
4. (Sub-objective 3) Identifying physiological parameters, through controlled laboratory experiments using identified stressors (from 3. above) which can be used to evaluate deviations from baseline values (stress responses) in captive lobsters.
5. (Sub-objective 4) Develop simple methods of measuring one or more of the stress parameters identified in sub-objectives 2 and 3 for use in lobster processing factories in the evalutation of stress levels in selected lobster shipments
6. (Sub-objective 5) Apply the results and understanding of harvesting and post-harvest handling gained from field work in sub-objective 2, and the stress parameters identified in sub-objectives 2 and 3 in a study or studies of lobster postharvest handling practices aimed at developing improved post-harvest procedures
7. (Sub-objective 6) Use the findings of earlier sub-objectives to make recommendations for improvements in handling practices described in the recently published code of practice.
8. (Sub-objective 7) Use the findings to develop detailed knowledge and understanding of the physiological processes involved in stress responses in lobsters which can be used by processing companies and fishers to devise improved methods of post-harvest handling and transport.

Final report

ISBN: 0-7345-0160-9
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf
Final Report • 2001-11-13 • 1.58 MB
1996-345-DLD.pdf

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Aspects of feeding, maturation and osmoregulation in cultured juvenile greenback flounder

Project number: 1996-352
Project Status:
Completed
Budget expenditure: $38,948.00
Principal Investigator: John Purser
Organisation: University of Tasmania (UTAS)
Project start/end date: 29 Mar 1997 - 16 Feb 2005
Contact:
FRDC
TAGS
Physiology
Oceanography
Nutrition
Disease
Aquaculture

Objectives

1. Identify the stage(s) during flounder larval/juvenile development when deformities occur.
2. Determine the effect of nutritional feed supplementation and environment on the deformities in the juvenile fish.
3. Establish a diumal feeding profile for juvenile flounder, particularly in relation to light/dark cycles.
4. Measure the changes in blood osmolality during exposure to various salinity levels.
5. Construct a profile of maturation (time, weight change) and relate this to water temperatures and growth.
6. Produce juveniles for the grwo-out trials (as a consequence of producing fish for experimentation).

Final report

ISBN: 0 85901 828 8
Author: G. J. Purser
Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Final Report • 2017-09-29 • 1.41 MB
1996-352-DLD.pdf

Summary

Skeletal deformities have been observed in cultured flounder in recent years. At times, high percentages of fish are affected, potentially influencing growth and marketability, and affecting the reliability of the experimental data collected. Many growers taking fish for pilot scale grow-out trials reported mortality and low growth in many fish with gross skeletal deformities. Although skeletal (spinal) deformities are of most concern, mal-pigmentation or pseudo-albinism is also significant. It is likely that nutritional deficiencies/imbalance are responsible for these conditions but as the nutritional requirements of this species are unknown, the causes are unidentified. Deformities in the past have been observed in fish larger than 5-10 g. It was the aim of this study to identify the timing of the appearance of the skeletal deformities during a documented larval/juvenile rearing period and to trial alternative production protocols. It was outside the scope of this study to identify the causes of the deformities. The results show that deformities are visible after a period of time on artificial diets, during the post-weaning period Deformities were not evident during the live feed period.

The main objective in the detection of the spinal deformities was achieved but the manipulation of diet and environment was only achieved on a superficial level. Future work in this area would need to consider the complex interactions between temperature, live feed enrichment, weaning and artificial diet composition.

Selective breeding for disease resistance and fast growth in Sydney rock oysters

Project number: 1996-357
Project Status:
Completed
Budget expenditure: $332,308.00
Principal Investigator: John Nell
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 27 Feb 1997 - 18 Mar 2004
Contact:
FRDC
TAGS
Reproduction
Husbandry
Fisheries Management
Disease
Biosecurity

Need

The NSW oyster industry has suffered from QX disease and winter mortality for a very long time. It has responded to these disease challenges by vacating affected leases seasonally or in the case of Georges River by abondoning the infested part of the estuary. The history of inter-estuary transfer of oysters for on-growing has not allowed the development of resistant strains in NSW. However, if resistant strains of oysters are not developed, the industry will have no better management tool available in future than that used in the past, ie moving or selling oysters before a disease outbreak is expected or abondoning oyster leases.

If the opportunity for breeding QX disease resistance in Sydney rock oysters is not taken up, a unique opportunity will be lost, to use breeding lines previously selected for fast growth in the selection for disease resistance. It is important that breeding for QX resistance begins now, before another estuary is infested with this parasite. In Georges River, the industry responded to the QX outbreak by abandoning affected leases.

Growth rates in Sydney rock oysters have been improved by an average of 4% for the first generation of selection in Port Stephens. Now the initial progress has been made and four breeding lines are established, it is important that the momentum is maintained and selective breeding for fast growth is continued. The growth rate of the Port Stephens selection lines can be increased by 4% for each successive generation.

Growth rates in Sydney rock oysters can be improved by both selective breeding (an average of 4% faster growth for the first generation of selection) and triploidy (30-40% faster growth). However, triploids have not previously been produced from improved breeding lines. It is important to determine if improvements in growth rates by these two methods are additive. For example with triploids produced from improved breeding lines, a 30% increase in growth rate with triploidy plus another 8% for two generations of selective breeding may increase growth rates of oysters by 38%.

Objectives

1. Evaluation of the resistance of fourth selected generation Georges River oysters to QX disease and winter mortality against controls
2. Evaluation of the growth rate of fourth selected generation Port Stephens selection line diploids and triploids against non-selected diploid and triploid controls

Final report

Final Report • 2017-09-29 • 580.00 KB
1996-357-DLD.pdf
Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Final Report • 2017-09-29 • 580.00 KB
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Aquaculture Diet Development Subprogram: ingredient evaluation

Project number: 1996-391
Project Status:
Completed
Budget expenditure: $503,574.00
Principal Investigator: Geoff L. Allan
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 5 Nov 1996 - 7 Jun 2004
Contact:
FRDC
TAGS
Nutrition
Food Web
Aquaculture
Animal Health

Objectives

1. Determine nutrient digestibility of major terrestrial protein and energy feed ingredients for which information is not currently available.
2. Determine contribution to fish and prawn growth of the most promising new ingredients and identify the maximum amounts which can be included in practical diets.
3. Evaluate carbohydrate utilisation and determine effects of carbohydrate type, content and processing on digestibility.
4. Use results to determine first limiting nutrients for fish and prawn diets based on Australian ingredients, and to formulate practical diets for evaluation in commercially relevant facilities.
5. Communicate results to producers of feed ingredients, feed manufacturers, aquaculturists and the scientific community.

Final report

Author: Geoff Allan
Final Report • 2017-09-29 • 5.05 MB
1996-391-DLD.pdf
Final Report • 2017-09-29 • 5.05 MB
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Final Report • 2017-09-29 • 5.05 MB
1996-391-DLD.pdf

BCA - Ecologically sustainable development of the fishery for Patagonian toothfish (Dissostichus eleginoides) around Macquarie Island: population parameters, population assessment and ecological interactions

Project number: 1997-122.80
Project Status:
Completed
Budget expenditure: $5,445.45
Principal Investigator: Tony Kingston
Organisation: Fisheries Economics Research and Management Specialists (FERM)
Project start/end date: 8 Sep 2003 - 30 Jun 2004
Contact:
FRDC
TAGS
Sustainability
Stock Assessment
Population Dynamics
Mortality
Marketing

Need

The Patagonian toothfish fishery is expanding worldwide and it may play a pivotal role in the development of an Australian fishing industry in the Southern Ocean. The recommended TAC for toothfish in other Southern Ocean regions was revised upwards by the 1996 CCAMLR scientific committee. For example, in the CCAMLR area 58.5.2 (primarily the AFZ around Heard and McDonald Islands) a TAC of 3800 metric tonnes of toothfish was set. As a result considerable national and international interest in the fishery is expected.

Given the conservation value of Macquarie Island it is expected that operation of the fishery will be closely scrutinised -- the scrutiny is already clear at the national ( MACSAG, AFMA, DPIE and conservation groups) level. Development of the Macquarie Island fishery provides a great opportunity as a demonstration project to illustrate that fishery development can be achieved while protecting conservation values -- a demonstration of Ecologically Sustainable Development in action. Furthermore, much of what will be learnt will also be relevant to the emerging Heard Island toothfish fishery.

To date little research has been done to establish the basic biological parameters of the toothfish necessary to develop sound management policies. As recognised by both the Macquarie Island Fish Stock Assessment Group and the Sub-Antarctic Ecosystem Assessment Group there is a real need to develop a comprehensive program of research which not only addresses basic biological parameters such as age and stock structure, but also examines the distribution and abundance of this species so that effective management of the fishery can proceed. As the Macquarie Island area is likely to be sensitive to possible ecosystem changes brought about by a developing fishery, there is also a need to understand where toothfish 'fit into' the broader offshore Macquarie Island ecosystem, and likely ecosystem effects.

Objectives

1. Determine the key population parameters (age validation, growth, age of maturity, mortality of fished cohorts, and population structure after age validation), distribution, movements and relative abundance of the Patagonian toothfish around Macquarie Island.
2. Assess the usefulness of DNA micro satellite markers for determining stock structure.
3. Assess the biological and physical oceanographic effects on catch rates, toothfish availability, and interactions between the fishery and non-target species.
4. Assess the magnitude and composition of the fishery bycatch, and identify the food chain linkages between the fishery, the toothfish, the main bird and mammal species.
5. Develop population models for the Patagonian toothfish fishery and provide strategies for developing and managing the fishery.

Final report

Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80
Final Report
1997-122.80

Determination of patagonian toothfish age, growth and population characteristics based on otoliths

Project number: 1997-123
Project Status:
Completed
Budget expenditure: $22,850.00
Principal Investigator: John Kalish
Organisation: Australian National University (ANU)
Project start/end date: 29 Jun 1997 - 2 May 2001
Contact:
FRDC
TAGS
Stock Assessment
Mortality
Life History
Animal Health
Ageing

Need

Data on fish age are essential to determine the production of fish stocks. Collection of age structure data early in the history of a fishery are particularly important to determine the natural mortality rate of a population. Data relating to the age structure of populations and growth rates can also be applied to the identification of stocks. Annual estimates of population age structure are employed to identify population responses to exploitation and environmental variability and can be used to develop more data intensive methods of population assessment (eg Virtual Population Analysis). Otoliths are the structures employed most often to estimate age of fishes and validation research at the ANU indicates that toothfish otoliths are suitable for this purpose.

A "stock" is the basic unit of management in most fisheries and identification of these units is a prerequisite to accurate assessment and effective management. There are no data on stock structure for Patagonian toothfish. As a result, we have no knowledge regarding the potential impacts of toothfish exploitation outside the AFZ on toothfish stocks within the AFZ.

Knowledge of toothfish biology is extremely limited. Given the lack of baseline biological data, it would be difficult to identify possible responses of toothfish stocks to exploitation or differences in life history characteristics among putative stocks. Identification of changes in basic life history characteristics such as age or size at maturity and timing of ontogenetic migrations are important to management of fish species within both a stock and ecosystem context.

Objectives

1. Validate otolith-based age estimates for Patagonian toothfish (Dissostichus eleginoides).
2. Establish routine age estimation procedures for Patagonian toothfish.
3. Determine growth rates for Patagonian toothfish.
4. Determine age structure of the toothfish populations from the AFZ surrounding Macquarie Island and other localities
5. Determine age structure from successive years of sampling to identify possible shifts in age structure or inconsistencies in the application of the age estimation method.
6. Liaise with groups involved with modelling the dynamics of toothfish populations.
7. Apply otolith morphometrics and otolith chemistry to discrimination of possible toothfish stocks.
8. Establish an inter-agency (international) program to determine if there is variation in the interpretation of toothfish otolith sections
9. Publish reports for immediate stock assessment and management purposes and peer-reviewed articles in international journals for dissemination of results.

Final report

ISBN: 0-646-39950-0
Author: John Kalish
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf
Final Report • 2001-02-18 • 363.12 KB
1997-123-DLD.pdf

Stock assessment of the outer-shelf species in the Kimberley region of tropical Western Australia

Project number: 1997-136
Project Status:
Completed
Budget expenditure: $343,428.00
Principal Investigator: Stephen J. Newman
Organisation: Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date: 22 Jun 1997 - 16 Jul 2003
Contact:
FRDC
TAGS
Sustainability
Stock Assessment
Population Dynamics
Mortality
Modelling

Need

The Kimberley Fishery is developing rapidly and is now a complex fishery producing a high quality product. The small amount of information available at present causes concern at the state of exploitation of the stocks. Information is required as soon as possible to enable effective management of the fishery. The tools available are controls on size at first capture and overall fishing mortality. It is more practical in the first instance to obtain the information which will enable control of size at first capture, and to follow this with the information needed to control fishing mortality.

The size selectivity of traps and lines needs to be examined to explore the possibility of using hook sizes and escape gaps in traps to reduce catches of smaller fish and hence increase long-term yields. Initial management controls can then be based on the outcome from size-at-first capture models. The size-at-first capture may be able to be controlled through the use of a mixture of fishing gear types (eg. fish traps in combination with lines and hooks of a specified size). The size-at-first capture of these fishes may also possibly be regulated through area controls, provided the distribution of adults and juveniles is known.

These preliminary management controls will need to be followed up with a broad area fish trawl survey to provide estimates of stock size for use in more complex stock assessment models, enabling subsequent management controls to be implemented with the aim of directly regulating fishing mortality. A trawl survey would add greatly to knowledge of distribution of adults and juveniles. Direct controls on fishing mortality by area can be applied by zoning of fishing effort, monitored through the use of Vessel Monitoring Systems. For logistic reasons the trawl survey is not included in the current proposal.

Specifically in this project there is a need to:

(i) determine the population parameters of goldband snapper, and other key demersal species to facilitate the development of fishery assessment models.

(ii) undertake a gear selectivity study (both traps and lines) to determine the feasibility of using gear controls such as hook size and escape gaps in traps.

There is a further critical need in future projects to obtain:
(1) direct stock size assessments via such methods as localised depletion experiments or broad area surveys;
(2) to obtain information about the interaction of the Australian and Indonesian fishery (assessment of catch and effort data) for these species;
(3) to obtain estimates of movement rates of the key species between regions and across borders (both national and international).

Objectives

1. Estimate essential population parameters of goldband snapper and other key demersal species.
2. Estimation, by yield-per-recruit and egg-per-recruit analyses, of optimum combinations for size-at-first capture and fishing mortality.
3. Comparison of the size selectivity of commercial trap and line gear and to investigate methods of altering selectivity to enable targeting of fish of a specific size.
4. Advise fishery managers and industry on the combinations of gear and effort controls to produce optimal sustainable yields.

Final report

ISBN: 0-7309-8460-5
Author: Stephen Newman
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf
Final Report • 2003-03-14 • 2.22 MB
1997-136-DLD.pdf

Biomass and sustainable yield assessment of the outer-shelf fishery resources off the Pilbara coast of tropical Western Australia.

Project number: 1997-138
Project Status:
Completed
Budget expenditure: $311,786.00
Principal Investigator: Michael Moran
Organisation: Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date: 22 Jun 1997 - 25 Oct 2000
Contact:
FRDC
TAGS
Sustainability
Mortality
Fisheries Management
Electronic Log Book
Ecosystem

Need

Managers need to be provided with information that will ensure that fishing mortalities remain below the appropriate biological reference points for the key species.

To provide this information, knowledge is required of the relationship between fishing effort and fishing mortality. An experimental approach which provides a clearly measurable level of fishing mortality will achieve this. The fish in the 100-200m depth zone are schooling species and commercial effort will naturally be targeted on schools, so commercial catch rates cannot be used for the abundance measures required to calculate fishing mortality. There is a need therefore for survey fishing before and after the period of intense commercial fishing and for research personnel to oversee the survey fishing, gather samples and information on the survey cruises, process these at the laboratory and analyse the results. Monitoring of the fishing effort through research logbooks during the commercial fishing period is also required.

Objectives

1. To determine the relationship between fishing effort and fishing mortality for the key outer-shelf demersal scalefish species (principally Pristipomoides multidens) in the Pilbara fishery.
2. To document the distribution and abundance of adults and juveniles of major finfish species in the 100 to 200m depth zone off the Pilbara coast.
3. To provide industry and management with a range of options for sustainable exploitation of the deeper water fish resources of the Pilbara.

Final report

ISBN: 0-7309-8443-5
Author: Michael Moran
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
Final Report • 2000-09-25 • 1.39 MB
1997-138-DLD.pdf
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