Assess causes and implications of anomalous low lobster catch rates in the shallow water areas near the centre of the Western Rock Lobster fishery
The use of BRUVs as a tool for assessing marine fisheries and ecosystems: A review of the hurdles and potential
National reviews of Fisheries R&D needs (FRDC95/055) have identified the need for non-extractive, fishery-independent sampling and stock assessment techniques which are cost-effective, repeatable and robust across and range of habitats and depths. These methods are becoming increasingly important as Australian fisheries face the challenge of addressing ecosystem based fisheries management and climate change. A national workshop on the use of video for sensing the size and abundance of target and non-target fauna in Australian fisheries (FRDC2000/187) highlighted the potential for Baited Remote Underwater Video systems (BRUVs). After a decade, there has been wide adoption of this technique. However, differences in protocols for deployment, analysis and interpretation make spatial and temporal
comparisons of data difficult.
There is the need to develop a robust set of nationally agreed upon protocols to ensure that users are appropriately informed and trained through a comprehensive extension and capacity building program that also identifies key unresolved technical issues.
With the increased testing and use of BRUVs a number of independent developments have occurred. Future technological advances and more detailed statistical and modelling approaches will result in the BRUVs data being more useful for ecosystem assessment and management. Maximising the potential that these advances will provide to Australian fisheries will be achieved by a co-ordinated and
collaborative research strategy. We propose to host a two day workshop to critically evaluate the use of BRUVs as a data collection tool
for scalefishes and sharks. The workshop will identify the strengths, limitations and identify potential solutions.
Final report
Tactical Research Fund: Economic assessment of the impact of recent major changes to fisheries management in the WA West Coast demersal wetline fishery
The West Coast demersal wetline fish stocks are currently overfished. The best assessment calls for an immediate 50% reduction in the catches of Category 1 “high risk” species.
New management initiatives are being implemented across the commercial, recreational and charter sectors to secure the necessary catch reductions. The success of these initiatives depends upon each sector responding appropriately.
Early assessment of the impact of these changes and the response of each sector is essential. The time for this assessment is now, as the changes begin to take effect, in order that an early understanding of the reactions of fishers and the likely long-term impacts can be formed.
The new restrictions will impact significantly on recreational fishing over the next year, therefore, there is a pressing need to understand how the sector responds in terms of behaviour, catches, and overall satisfaction with the fishing experience. The proposed recreational fisher survey is designed to meet this requirement, so that the early operation of the new regime can be measured, and compared to the pre-change situation captured in a similar survey funded under FRDC 2001/036 undertaken by Nicholls and McLeod. Knowledge about changes in behaviour and satisfaction with the fishing experience are crucial to understanding the impact of the changes.
Department of Fisheries estimates show that the commercial catch has been brought within the desired range. There is now a need to assess how these changes have impacted upon the commercial viability and social dynamics of coastal harbour towns. No pre- and post-change comparisons have been undertaken, a deficiency that the proposed data collection is designed to address.
The role of the Charter sector and its response to management changes is an integral part of the project.
All components of the project are designed to deliver the required information in a timely fashion.