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A Quantitative Analysis of Prawn Harvesting Strategies. Prawn fisheries in NSW are undergoing major changes in their management. This unusual PhD project will design and test new decision-rules and strategies for fishery managers that are based upon pragmatic quantities of catch-per-unit-effort, prawn size, and river temperature and discharge. The performance of rules and strategies will be measured to ensure that they generate satisfactory outcomes for the prawn resources and the people that de ....A Quantitative Analysis of Prawn Harvesting Strategies. Prawn fisheries in NSW are undergoing major changes in their management. This unusual PhD project will design and test new decision-rules and strategies for fishery managers that are based upon pragmatic quantities of catch-per-unit-effort, prawn size, and river temperature and discharge. The performance of rules and strategies will be measured to ensure that they generate satisfactory outcomes for the prawn resources and the people that depend upon them. A major outcome will be precautionary or risk-averse decision-rules and strategies that are robust to the uncertainties that exist in prawn fisheries.Read moreRead less
A genetic and experimental assessment of the frequency and importance of hybridisation of Black and Yellow Fin Bream. Bream (Acanthopagrus spp.) species underpin several valuable and heavily exploited fisheries in eastern Australia, but the two principal species, yellowfin (A. australis) and black (A, butcheri), interbreed significantly. This hybridisation is poorly documented and, with increasing harvests, could lead to long-term economic impacts and severe repercussions on biodiversity. It cou ....A genetic and experimental assessment of the frequency and importance of hybridisation of Black and Yellow Fin Bream. Bream (Acanthopagrus spp.) species underpin several valuable and heavily exploited fisheries in eastern Australia, but the two principal species, yellowfin (A. australis) and black (A, butcheri), interbreed significantly. This hybridisation is poorly documented and, with increasing harvests, could lead to long-term economic impacts and severe repercussions on biodiversity. It could, for example, increase the risk of localised extinctions and impact on genetic diversity of both species. We will use an innovative combination of molecular genetics and breeding experiments to: (i) determine frequency and direction of hybridisation; (ii) infer strength of genetic connections among estuaries; and, (iii) explore implications for sustainable fisheries management.Read moreRead less
Reducing the bycatch pf juvenille bream, luderick and mullet in the NSW ocean haul fishery. To ensure long-term sustainability of the targeted species, it is imperative that the ocean haul fishery implements conservation-orientated practices. Failure to reduce the mortality of bycaught bream, luderick and mullet in the ocean haul fishery is likely to impact on the quality of both commercial and recreational fishing for these important species. The aims of the project are to (i) determine selecti ....Reducing the bycatch pf juvenille bream, luderick and mullet in the NSW ocean haul fishery. To ensure long-term sustainability of the targeted species, it is imperative that the ocean haul fishery implements conservation-orientated practices. Failure to reduce the mortality of bycaught bream, luderick and mullet in the ocean haul fishery is likely to impact on the quality of both commercial and recreational fishing for these important species. The aims of the project are to (i) determine selectivity of the existing nets used and (ii) to develop and assess modifications to gears that reduce bycatch. More specifically the utility of simple changes to existing mesh sizes and shapes to improve selectivity and bycatch reduction devices will be investigated. The expected outcomes of this project will be the conservation of hundreds of thousands of juvenile fish ensuring a better fishery, whilst also securing the economic and social structure of coastal communities that support this fishery.Read moreRead less