PROJECT NUMBER
•
2022-029
PROJECT STATUS:
CURRENT
ORGANISATION:
University of Sydney (USYD)
6 results
PROJECT NUMBER
•
2023-006
PROJECT STATUS:
CURRENT
ORGANISATION:
University of Sydney (USYD)
Aquatic Animal Health Subprogram: Pacific oyster mortality syndrome (POMS) - understanding biotic and abiotic environmental and husbandry effects to reduce economic losses
Project number:
2011-053
Project Status:
Completed
Budget expenditure:
$130,000.00
Principal Investigator:
Richard Whittington
Organisation:
University of Sydney (USYD)
Project start/end date:
31 Oct 2011
-
16 Dec 2012
Contact:
FRDC
TAGS
SPECIES
There is a disturbing pattern of diseases in commercial molluscs nationally. They have required a succession of government/industry responses, with no clear solutions:QX disease, Sydney rock oysters, NSW and QLD; NSW; Pacific oyster mortality syndrome, NSW; Abalone viral ganglioneuritis, VIC; Oyster oedema disease, pearl oysters, WA; Winter mortality, Sydney rock oyster, NSW.
Economic impacts have been substantial or devastating. Wild fisheries and aquaculture have been impacted. In NSW, the primary impact of QX disease led to replacement of Sydney rock oysters by triploid Pacific oysters to reestablish the industry in some estuaries, but this is now threatened by POMS.
In every case the new disease has spread. It has not been possible to devise an intervention strategy that would halt disease spread or ensure the recovery of the industry. Investigating the behaviour of POMS during its predicted recrudescence this summer provides an opportunity to identify factors which may be used to reduce the impact of the infection.
This project seeks to investigate the effect of host, environmental and husbandry factors on POMS prevalence and mortality rate in Pacific oysters during summer 2011-autumn 2012 with the objective of discovering aspects of epidemiology which can be manipulated by oyster growers.
FRDC strategic R&D theme 1 - biosecurity and aquatic animal health, and Aquatic Animal Health Subprogram priority - Nature of disease and host-pathogen interaction - immunology of aquatic invertebrates.
1. To correlate biotic and abiotic environmental factors with POMS occurrence in selected oyster populations
Final report
ISBN:
978-1-74210-309-9
Author:
Richard Whittington
Optimal stocking density for Sydney and Pacific oyster cultivation
Project number:
1999-307
Project Status:
Completed
Budget expenditure:
$78,292.00
Principal Investigator:
Tony Underwood
Organisation:
University of Sydney (USYD)
Project start/end date:
25 Jul 1999
-
30 Jun 2002
Contact:
FRDC
SPECIES
A means of quantifying the optimal stocking density of oysters relative to their food resources (quantity and nutritional quality) is a necessary feature in the sustainable management of the oyster industry at a time of increasing demand both for a greater volume of production and improved production efficiency. This has been recognized by the industry as a major need for there to be further development of production. It is also urgent because of increasing scrutiny and regulation under principles of ecologically sustainable development. Maximal development can only be sustainable if local carrying capacity is well understood.
Of the various ways, in theory, of arriving at quantification of optimal densities, an approach which concentrates upon the oyster and its food, measured initially at the scale of the individual lease, is practical and feasible. Once this relationship is defined, it may then with confidence be extended to a variety of habitat conditions, since it will be based upon the fundamental physiological properties of the species.
This proposal aims to define these relationships via rigorous physiological determinations, coupled with appropriate field studies and modelling. The proposed product will be a tool of value to the oyster farmer and to those concerned with planning and approving the expansion of leases within coastal habitats.
1. To establish a functional relationship between stocking density, individual growth rate and yield for Sydney rock and Pacific oysters in an estuarine embayment in the Port Stephens estuary.
2. To generalise this relationship for relevance to other habitats by determining the interactions between available food, the feeding physiology and the growth of these oysters.
3. To use these formal relationships to demonstrate the optimal stocking densities for oyster cultivation in a variety of different environmental conditions.
4. To investigate the influence that feral oysters have upon such optimal density estimates.
5. To relate stocking density to the quality of the marketed oysters and investigate possible economic implications.
Final report
PROJECT NUMBER
•
2014-040
PROJECT STATUS:
COMPLETED
Oysters Australia IPA: Pacific Oyster Mortality Syndrome (POMS) – closing knowledge gaps to continue farming C. gigas in Australia
The present project is part of a continued program of epidemiologic investigations of
OsHV-1 in Australia. Sufficient understanding of POMS is required to provide
information for farmers and to direct policy so that profitable farming can continue
despite increasing distribution and devastating...
ORGANISATION:
University of Sydney (USYD)
SPECIES
Aquatic Animal Health Subprogram: Pacific oyster mortality syndrome (POMS) - risk mitigation, epidemiology and OsHV-1 biology
Project number:
2012-032
Project Status:
Completed
Budget expenditure:
$783,045.00
Principal Investigator:
Richard Whittington
Organisation:
University of Sydney (USYD)
Project start/end date:
18 Jun 2012
-
6 Sep 2015
Contact:
FRDC
SPECIES
There is a disturbing pattern of diseases in commercial molluscs nationally. They have required a succession of government/industry responses, with no clear solutions:QX disease, Sydney rock oysters, NSW and QLD; NSW; Pacific oyster mortality syndrome, NSW; Abalone viral ganglioneuritis, VIC; Oyster oedema disease, pearl oysters, WA; Winter mortality, Sydney rock oyster, NSW.
Economic impacts have been substantial or devastating. Wild fisheries and aquaculture have been impacted. In NSW, the primary impact of QX disease led to replacement of Sydney rock oysters by triploid Pacific oysters to reestablish the industry in some estuaries, but this is now threatened by POMS.
In every case the new disease has spread. It has not been possible to devise an intervention strategy that would halt disease spread or ensure the recovery of the industry. Investigating the behaviour of POMS during its recrudescence in summer 2011/2012 in FRDC project 2011-053 afforded a unique insight into the disease, and these observations need to be extended over time to identify factors which may be used to reduce the impact of the infection.
This project seeks to address 6 specific research priorities identified by FRDC and will concurrently investigate the effect of host, environment and husbandry factors on POMS prevalence and mortality rate in Pacific oysters with the objective of discovering aspects of epidemiology which can be manipulated by oyster growers. If POMS spreads beyond its current limited distribution in NSW, commercial scale production of Pacific oysters in the face of POMS will be essential for the viability of the industry pending development of technical solutions such as genetically resistant lines.
FRDC strategic R&D theme 1 - biosecurity and aquatic animal health, and Aquatic Animal Health Subprogram priority - Nature of disease and host-pathogen interaction - immunology of aquatic invertebrates.
1. To determine/confirm the identity of the one or more variant(s) of Ostreid herpesvirus associated with the recent outbreaks of POMS
2. To determine the mechanism(s) of transmission of disease
3. To determine the major risk factors that contribute to precipitation of disease outbreaks thereby identifying potential risk-mitigation management practices
4. To identify the natural reservoir(s) for the virus
5. To determine the stability of the virus in the environment
6. To identify physical and chemical means for viral inactivation
7. To develop an infecitivity model for POMS suitable for selection of resistant oysters and pathogenesis/environmental research
8. To address future shortages of technical expertise through the training and supervision of at least 1 PhD student
Final report
ISBN:
978 -1-74210-368-6
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