Diseases of prawns in aquaculture: to develop procedures to detect pathogens of prawns shipped interstate
Aquatic Animal Health Subprogram: development of a database for Australian laboratory diagnostic expertise for diseases of aquatic organisms
During emergency disease incidents, rapid diagnosis of the pathogen involved is critical to mounting an effective response. Because each laboratory does not have a complete range of diagnostic capability, often a specialist laboratory needs to be identified to assist in the diagnosis. Currently, there is no database of laboratories or their diagnostic abilities. Identification of alternative laboratories is done on an ad hoc basis, and often when the information is required rapidly, the best alternative laboratory is not identified.
In recent times, there have been actual examples of diagnosis being delayed by samples being sent to an inappropriate laboratory. This project will result in a readily accessible database with an up-to-the-minute listing of laboratories, their diagnostic capabilities and capacities, the range of techniques that they have available to diagnose each pathogen and their level of accreditation.
In Australia, each aquatic animal health laboratory has limited resources and it is not cost-effective to have all laboratories develop the full range of diagnostic capability. However,it is not desirable to send samples to overseas laboratories especially in the case of suspect exotic disease. The solution to this resource dilemma is to create a network of diagnostic laboratories within Australia. The first step in achieving this network is to conduct a stocktake of current capability and capacity and subsequently making the information gathered available to all laboratories.
Final report
Seafood CRC: yellowtail kingfish health workshop and feed analysis
Aquatic Animal Health Subprogram: development of a national translocation policy using abalone and prawns as templates for other aquatic species
To maximize gains from the breeding programs they need to cross best performing stock. Where the stock is located in different States, there is a need to move the animals across state borders - preferably as animal or seed, but the ability to move gametes or larvae would be viewed as significant progress towards achieving the objectives of the program. The project leaders are also requesting that the business of selling genetically enhanced stock not be restricted to customers within state borders as this limit would make the program economically unviable.
This need for national translocation policies is becoming urgent with the steady but unpublicized increase in the number of aquatic animal hatcheries across Australia. To make the hatcheries viable, sales across jurisdictions in some industries are essential in some industries. Considering all aquatic animal species, not just abalone, Western Australia alone has in excess of seventeen aquaculture production hatcheries (as at August 2003) and this pattern is similar in other jurisdictions.
Final report
The use of scientifically based hazard identification, risk analysis and risk management is fundamental to managing unwanted effects. Hazards, such as quarantine incursions, will continue to occur despite the use of risk assessment methodologies but the frequency and severity of their occurrence will be reduced.
This was recognised by the Ministerial Council on Forestry, Fisheries and Aquaculture in 1999 when they published the “National policy for the translocation of live aquatic organisms”.
This FRDC project provides a simple risk assessment methodology based on the Australian Standard for Risk Management (AS/NZS 4360: 2004) and one that is consistent with the Ministerial Council policies. It was trialled in a workshop situation involving stakeholders to derive scores for likelihood and consequences associated with identified hazards. From these scores a risk rating can be obtained that will indicate whether risk management measures need be applied. At the workshop a number of management measures were suggested for reducing risks associated with abalone and prawn translocations and these are documented. However, the application of management measures is an issue for individual jurisdictions who assess the risk in terms of their own acceptable level of risk and then adopt appropriate management measures. For example, the risks associated with translocation of trout in Tasmania have far greater consequences to that state than the same risks would in Western Australia.
Overall, and for both abalone and prawns, the known risks associated with translocation of selected lines of juvenile stock bred in high health hatcheries and of known disease status, to onshore grow out facilities should prove to be manageable in terms of risk. Examples of translocation management measures adopted in Western Australia and Queensland are provided as appendices. Translocation of animals of known disease status into open water or semi-open water culture situations is more problematic and is likely to be influenced by genetic issues as well as disease issues.
The risk assessment methodology used is readily adaptable to other species and to risks associated with the environment or genetic issues, though, with the exception of fouling organisms on abalone, these were not specifically addressed during the workshop.
Domestic trade is governed by the Commonwealth Government’s Mutual Recognition Act 1992 and complementary legislation. This ensures that consistency with World Trade Organisation and sanitary and phytosanitary principles extends to trade between States and Territories. It is probable that States and Territories will adopt differing entry requirements due to differing assessments of risk based on individual assessments of likelihood and consequence, and variations between acceptable levels of risk between jurisdictions. However, the measures adopted and the reasons for their adoption must be documented and they must be science based.
Keywords: Abalone, aquaculture, prawns, shrimp, translocation, risk assessment.