National Guidelines to develop fishery harvest strategies
Detection and abundance of Paramoeba species in the environment
Vaccination for emergency and long-term control of nodavirus in Australian marine aquaculture
Shark depredation in Australian fisheries: understanding the scope of the issue and identify potential mitigation options
Aquatic Animal Health Subprogram: establishment of a national aquatic animal health diagnostic network
The lack of many recognised serious diseases is perceived as one of Australian aquaculture’s prime competitive advantages to meet future global demand. Maintenance of this high health status through initiatives which reduce the risk of disease incursions and facilitate early detection and response to emerging disease problems is seen as critical to continuing industry expansion. The range of commercially significant aquatic animal species, and their diseases, is increasing steadily. It is clear that, due to limited resources, diagnostic laboratories cannot develop proficiency in the diagnosis of all significant diseases, for example those listed in the Australian National List of Reportable Diseases of Aquatic Animals. Appropriately, State laboratories, in support of local industries, concern themselves with local aquatic animal species and their significant diseases and have developed expertise in those areas. Rather than duplicate this effort, AAHL’s involvement and expertise focuses on exotic diseases of concern to Australia, as well as new or emerging endemic diseases. As a consequence, expertise in specific diseases has developed in different laboratories throughout the country. To take advantage of this development, to ensure that expertise in different diseases is available Australia-wide, and to create a consistent system of aquatic animal disease diagnosis and reporting, it is proposed that a national network of laboratories should be established for the diagnosis and monitoring of aquatic animal diseases underpinned by a formal quality assurance program. Through a consultation process, uniform data standards and reporting formats need to be developed and adopted by all jurisdictions. Standard diagnostic tests and operating procedures also need to be developed and subsequently adopted by laboratories within the network. Thus this project is concerned with the establishment of the network and commencement of activities, including proficiency tests (“ring tests”) designed to assist laboratories in further developing their diagnostic capabilities and/or to allow demonstration that performance of a particular test is at a nationally accepted standard, using Australian and New Zealand Standard Diagnostic Procedures (ANZSDPs). In this way confidence of stakeholders in the quality of diagnosis provided is increased. The project is in complete alignment with AQUAPLAN 2005-2010.
Final report
Seafood CRC: Increasing the profitability of Penaeus monodon farms via the use of low water exchange, microbial floc production systems at Australian Prawn Farms and at CSIRO
The economic viability of the Australian prawn farming industry is under threat because of the increased production of shrimp in south-east Asia and the substantial decrease in global prawn prices. The Australian industry is experiencing difficulty competing with imports – prawns can be landed from China and Thailand for $7 to $9 per kg, compared with the current cost of production in Australia of $5 to $12 per kg. In addition, the industry is under increasing pressure from environmental regulators to reduce the scale and impact of nutrient discharges from prawn farms.
The critical need is to develop a production technology for P. monodon that enables Australian prawn farmers to gain the same improvements in production efficiency that have been achieved overseas with P. vannamei with high intensity, zero discharge systems. The need for the proposed research is to gain an understanding of the chemical and physical processes occurring in the zero water exchange ponds so as to be able adapt and manage this novel production system for P. monodon. A reduction in nitrogen input into the pond throughout the entire growing season is a critical part in managing a zero water exchange pond system. This can be achieved through lower feeding rates and the use of low-protein feeds. However, this can only be achieved by managing the system so that the prawns get a substantial part of their nutrition from the microbial floc. Hence, there is a need to develop protocols to maximise the nutritional value of microbial flocs and their physical characteristics. In doing this, it will be possible to reduce the amount of feed used and its cost for the production of the prawns, thereby improving farm profitability.
Final report
The economic viability of the Australian prawn farming industry is under threat from increased production of farmed prawns in south-east Asia and the substantial decrease in global prawn prices. The Australian industry is experiencing difficulty competing with imports; prawns can be landed from China and Thailand for about $8 per kg, compared with the current cost of production in Australia of about $10 per kg. The industry is also under increasing pressure from environmental regulators to reduce the scale and impacts of sediment and nutrient discharges from prawn farms. There is a critical need to develop production technology for black tiger prawns (Penaeus monodon) that enables Australian prawn farmers to gain the same improvements in production efficiency that have been achieved overseas with Pacific white shrimp (Litopenaeus vannamei), with high intensity, low discharge systems. Australian Prawn Farms Pty Ltd (APF) investigated the production technology used for L. vannamei and concluded that it was not suitable for Australian farming conditions and for the culture of P. monodon. As a result, APF did some preliminary trials using their own ideas for a low water exchange system that was more suitable for P. monodon, with promising results. However, to make further progress, there was a need for a broader and more extensive research effort than APF could do on its own without some external funding and scientific support.