26 results
Industry

Grow-out of Snapper (Pagrus auratus) in sea cages

Project number: 1992-062
Project Status:
Completed
Budget expenditure: $405,205.00
Principal Investigator: Nino Quartararo
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 11 Oct 1992 - 18 Mar 1997
Contact:
FRDC

Objectives

1. To develop techniques for growing-out juvenile snapper to market size in sea cages at the commercial scale
2. To aquire the husbandry skills necessary for holding wild caught snapper in sea cages as an integral part of value-adding for the live fish market

Final report

ISBN: 0-7310-9401-8
Author: Nino Quartararo
Final Report • 1996-07-26 • 1.61 MB
1992-062-DLD.pdf

Summary

The aim of this project was to farm, on a pilot commercial scale, two indigenous species of marine fish: snapper, Pagrus auratus; and mulloway, Argyrosomus hololepidotus.

The project involved:

  • development of hatchery techniques;
  • intensive rearing of larvae;
  • transport of live fish;
  • design, construction and testing of seacages for research;
  • grow-out of juvenile fish in tanks and seacages;
  • identifying and treating disease outbreaks in seacages;
  • obtaining production data; and
  • obtaining preliminary marketing information.

The project sought to provide information on the possibility of enhancing wild stocks of mulloway by the release of fish originating from a hatchery.

Enhancement of mulloway (Argyrosomus hololepidotus) in intermittently opening lagoons

Project number: 1995-148
Project Status:
Completed
Budget expenditure: $131,502.00
Principal Investigator: Stewart Fielder
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 29 Dec 1995 - 30 Jun 2000
Contact:
FRDC

Objectives

1. To evaluate the production of mulloway juveniles using intensive and extensive techniques.
2. To stock two intermittent lagoons with some 50 000 juvenile mulloway

Mariculture nutrition

Project number: 1984-067
Project Status:
Completed
Budget expenditure: $0.00
Principal Investigator: John Nell
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 28 Dec 1987 - 31 Dec 1987
Contact:
FRDC

Objectives

1. Develop suitable artificial diets for use in higher density prawn farming ponds.
2. Develop micro-encapsulated diets for use in oyster hatchery operations

Nursery culture of the sydney rock oyster saccostrea commercialis and the pacific oyster crassostrea gigas

Project number: 1987-036
Project Status:
Completed
Budget expenditure: $30,764.23
Principal Investigator: John Holliday
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 28 Jun 1990 - 30 Jun 2000
Contact:
FRDC

Objectives

1. Develop alternative hatchery settling techniques to scallop shell chips, for Sydney rock and Pacific oysters

Enhancement and farming of scallops in NSW using hatchery produced seedstock

Project number: 1994-084
Project Status:
Completed
Budget expenditure: $435,251.36
Principal Investigator: Mike Heasman
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 20 Jul 1994 - 12 Jan 1999
Contact:
FRDC

Objectives

1. To develop optimal seeding and harvesting strategies for Jarvis Bay using hatchery reared scallops
2. To extent special hatchery and nursery rearing equipment and techniques to the production of triploid P fumatus seedstock
3. To compare the relative quality and production of diploid and triploid scallops in hanging culture and for reseeding of the Jarvis Bay scallop fishery
4. To evaluate 3 methods of rearing 1-2 mm scallops to a harvestable size of 7-9 mm as outlined in the application at B4

Final report

Authors: M. P. Heasman W. A. O'Connor S. J. O'Connor and W. W. Walker
Final Report • 1998-10-01 • 11.54 MB
1994-084-DLD.pdf

Summary

This is a report on the second stage of a two part program investigating hatchery production, farming and seeding of the commercial scallop, Pecten fumatus. A total of more than four million scallop spat were produced for farming trials and over 250 000 scallops ranging in size from 20-60 mm were released into Jervis Bay.

 

Hatchery techniques were broadened to include procedures for the production of triploid P. fumatus. In general, the survival of triploid scallops was considerably lower than that of normal (diploid) scallops, particularly, immediately after treatment and during early larval rearing. No differences were observed between triploid and diploid spat, however, juvenile triploid scallops tended to be larger and heavier with significantly larger muscle tissues. The significant reduction in embryo development percentages (>80%), the relatively low percentage triploidy achieved initially (41%) followed by consistent reductions in percentage triploidy, mean that further research is required before it would be applied to the commercial sector.  

 

Although our previous research had, for the first time, demonstrated reliable large scale rearing of P. fumatus larvae was possible, several major constraints to hatchery production were noted. Previously, larvae were either retained in the hatchery until they were large enough to be transferred to land based upweller systems, or larvae were settled on mesh in collector bags and transferred directly to the field. A new technique was developed in which larvae were settled on mesh screens held in the hatchery for about a fortnight before being placed in mesh bags at known densities and moved to the field for culture. This technique allows control of spat stocking density, and has produced threefold increases in spat yields over previous bag settlement techniques while significantly reducing maintenance costs.

 

KEYWORDS: Commercial scallop, hatchery production, farming, reseeding.

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PROJECT NUMBER • 2018-125
PROJECT STATUS:
COMPLETED

Evaluation of practical technologies for Perfluoroalkyl (PFA) remediation in marine fish hatcheries

Per- and poly-fluoroalkly substances (PFASs) are now emerging as pollutants with potentially catastrophic impact on aquaculture facilities. Two key research institutes, Port Stephens Fisheries Institute (PSFI) in NSW and Australian Centre for Applied Aquaculture Research (ACAAR) in Western Australia...
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)
Industry
PROJECT NUMBER • 2016-802
PROJECT STATUS:
COMPLETED

Future Oysters CRC-P: Accelerated Sydney Rock Oyster (SRO) Breeding Research

This project focussed on increasing genetic resistance of Select Oyster Company (SOCo) breeding program Sydney rock oyster (Saccostrea glomerata, SRO) families to QX disease and winter mortality (WM) disease. NSW DPI has worked collaboratively with SOCo to develop a SRO family-based breeding program...
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)

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

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
Industry
PROJECT NUMBER • 2016-803
PROJECT STATUS:
COMPLETED

Future oysters CRC-P: New Technologies to Improve Sydney Rock Oyster Breeding and Production

Hatchery production of Sydney Rock Oysters (SROs, Saccostrea glomerata) is a costly and high risk activity for the breeding program and industry exacerbated by factors such as: reliance on hatchery conditioning, low fertilisation success using strip-spawned gametes, extended larval rearing period...
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)
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