32 results
Industry
PROJECT NUMBER • 1998-360
PROJECT STATUS:
COMPLETED

Waterproof labelling and identification systems suitable for shellfish and other seafood products

This report outlines the results of investigations into the feasibility of cost effectively marking or labelling individual oysters and other shellfish for product differentiation and to facilitate rapid and efficient recall of product in the event of a potential public health incident. A number of...
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)
Industry
PROJECT NUMBER • 1996-355
PROJECT STATUS:
COMPLETED

Review of shellfish purification technology research and development

Depuration in the context of this report can be defined as the process by which harvested shellfish are placed in land based plants containing clean estuarine water to permit the purging of their gastrointestinal contents under controlled conditions. Depuration does not include the practice of...
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)
Industry
Industry
PROJECT NUMBER • 1981-069
PROJECT STATUS:
COMPLETED

Clarence River pilot prawn farming project

The research programme was largely comprised of farming trials in a 1 ha prawn farming pond and in swimming pools on the pond bank at the field site. Juvenile school prawns (Metapenaeus macleayi) were collected by commercial trawlers in Lake Wolloweyah, transported by punt to the pond where they...
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)
Environment
PROJECT NUMBER • 2005-076
PROJECT STATUS:
COMPLETED

QX resistant oyster challenge trial 2005 - 2006

The Hawkesbury River is located approximately 50 km north of Sydney NSW. In 2003, the Hawkesbury River was the third largest Sydney rock oyster Saccostrea glomerata (SRO) producing estuary in NSW, with an annual farm gate production of $3.6M (10.1 million oysters). The commercial production of SRO...
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)
Environment
PROJECT NUMBER • 2020-104
PROJECT STATUS:
COMPLETED

Evaluating of the role of direct fish-to-fish contact on horizontal transmission of Koi herpesvirus

Epidemiological modelling has been undertaken to evaluate the impact of CyHV-3 as part of an assessment of the feasibility of this virus as a potential biocontrol for carp in Australia. The present project provides information to support key components of the mechanisms of virus transmission which...
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)
Industry

Seafood CRC: Sydney rock oysters: overcoming constraints to commercial scale hatchery and nursery production

Project number: 2003-209
Project Status:
Completed
Budget expenditure: $664,640.24
Principal Investigator: Wayne O'Connor
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 29 Jun 2003 - 5 Sep 2008
Contact:
FRDC

Need

A systematic program of research and development is needed to enable reliable cost-effective hatchery production of Sydney rock oyster (SRO) seed to allow demonstrated benefits of triploid oysters and advances in SRO selection for growth and disease resistance. This R&D program incorporates relevant recommendations of the recent “Review of Hatchery Production Technology and Breeding Program for Sydney Rock Oysters (“Benzie et al., FRDC 2001/213). This review acknowledged that the potential benefits of solving SRO hatchery production problems far outweigh the likely costs. The R&D program also incorporates and integrates recommendations the of the NSW Fisheries – FRDC “Sydney Rock Oyster Hatchery and Nursery Health Workshop” held on the 8 th and 9th of August 2002 at Nelson Bay. Central among these recommendations were:
1 The need for a revision of hatchery procedures and the assessment/adoption of alternate algal, larval and spat rearing technology.
2 The need to elucidate the fundamental autecological (temperature and salinity) and nutritional requirements of SRO during early ontogeny, that have not yet been addressed and will be central to the production of the species.
3 The need for systematic and appropriate sampling procedures for the diagnosis of potential disease occurrences.

Independent of the species involved, there is a need to document the processes involved in developing techniques and strategies to culture otherwise intransigent species. This research will provide a unique opportunity to document the history of problems with SRO, the consultation undertaken, the strategies developed for SRO and the techniques for their implementation. This document, the FRDC final report for this research, would provide a reference for dealing systematically with hatchery based problems and will provide an array of monitoring and assessment protocols for other molluscs.

Objectives

1. To establish protocols for improved broodstock conditioning and handling, particularly to permit out-of-season spawning of selected oyster stocks.
2. To determine the effects of the key autecological factors (temperature and salinity) and nutrition on SRO embryos and larvae, to evaluate early larval survival and late larval growth in commercial hatcheries.
3. To trial economical, low cost alternative techniques for algal and larval and spat rearing to enhance commercial SRO production. In particular to establish alternative approaches for spat rearing including spat bubblers and field based nursery systems.
4. To systematically assess the major potential pathogenic or toxic factors that might contribute to larval and spat mortality.
5. To facilitate the establishment of a reliable commercial source of genetically improved SRO spat.

Final report

Author: Wayne O'Connor
Final Report • 2009-09-28 • 1.79 MB
2003-209-DLD.pdf

Summary

Objectives:

  • 1. To establish protocols for improved broodstock conditioning and handling, particularly to permit out-of-season spawning of selected oyster stocks.
  • 2. To determine the effects of the key autecological factors (temperature and salinity) and nutrition on SRO embryos and larvae, to elevate early larval survival and late larval growth in commercial hatcheries.
  • 3. To trial economical, low cost alternative techniques for algal and larval and spat rearing to enhance commercial SRO production. In particular to establish alternative approaches for spat rearing including spat bubblers and field based nursery systems.
  • 4. To systematically assess and monitor the major potential pathogenic factors that might contribute to spat mortality.
  • 5. To facilitate the establishment of a reliable commercial source of genetically improved SRO spat.
  • As a function of the early success of this program in overcoming hatchery production problems, two additional milestones were added with the objective:

  • 6. To assess the performance of selectively bred oysters at seven sites across NSW and then monitor the changes in physiological and reproductive condition of those oysters at 3 of those sites.
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