Improving early detection surveillance and emergency disease response to Pacific Oyster Mortality Syndrome (POMS) using a hydrodynamic model for dispersion of OsHV-1
Developing on-growing techniques and disease prevention husbandry of pearl oysters in WA
Final report
the major opportunistic cause of mass mortalities of pearl
oysters (Pinctada maxima} on farm lease sites in the north
west of Western Australia. Vibriosis of P. maxima was found
to occur following some form of stressful husbandry practice
as similar mortality outbreaks were never apparent in natural
populations of pearl oysters throughout this investigation.
Potentially harmful Vlbrlo species were found to be associated
with pearl oysters in the Broome region throughout the year;
therefore vibriosis could occur at any time to oysters
subjected to excessive stress.
Aquafin CRC - Atlantic Salmon Aquaculture Subprogram: model development for epidemiology of Amoebic Gill Disease
Application of monoclonal antibody technology to larval identification and disease management in fisheries and aquaculture
APFA IPA: RNAi treatment of broodstock to reduce disease impacts in farmed prawns
Aquatic Animal Health Subprogram: enhancing the emergency disease response capability of NSW and Qld Government agencies and industry bodies associated with oyster culture
Tactical Research Fund: development and validation of effective and affordable oyster production systems in the face of POMS disease of Pacific Oysters and QX disease of Sydney Rock Oysters - evaluation from a production, research and economic perspective
After QX impacted oyster production in 2004, Broken Bay Oyster Association (BBOA) and encouraged by Government at all levels invested in new growing techniques with triploid pacific oysters. NSW DPI forecast 466 bags production by 09/10. by 10/11, BBOA produced 4569 bags - 10 times forecast and was the leading employer in the community and had resulted in an environmental cleanup of 8000 tonnes of rubbish removed. BBOA is today recognised and acknowledged nationally and internationally as an iconic example of a phoenix industry – emerging from the ashes of disaster. Members became active internationally to understand the disease and possible ways of managing oyster farming in the face of this new threats and invested (in-kind and $$) in world leading research to develop management plans around disease.
Despite significant pro-active undertakings by BBOA & government, on 22/01/2013, POMS was confirmed in a major juvenile growing area in the HR. By 8/02/2013, POMS has been identified throughout the Hawkesbury, Patonga and Brisbane Waters estuaries. Oyster losses are extreme (99% death of juvenile oysters) and still unfolding. The disease speed of infection and level of devastation was unprecedented. Oyster businesses got minimal notice to handle or sell stock before it became un-saleable.
To move forward, BBOA recognises the need to work with stakeholders (researchers, administrators and other river citizens) to identify possible survival mechanisms for the oyster industry in the Hawkesbury. IMPORTANTLY, the combination of QX and POMS offers a unique opportunity for production solutions to be identified, analysed and costed as a planning tool for other as yet unaffected oyster production areas around Australia. The devastating speed of the disease has resulted in the total removal of cash flow from BBOA and limited their opportunity to respond with alternate production methods.