Closing the loop: understanding the relationships between recreational fishing surveys, fishing regulations and fisheries management objectives. The project aims to improve the management of recreational fisheries in Australia by using model-based evaluations to understand the effects of recreational fishing regulations and survey design on the realisation and assessment of fisheries management objectives.
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
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
Understanding the stock-recruitment relationship to reverse the decline in the southern rock lobster. Declines in southern rock lobster fisheries across three Australian states show that we need to understand the flow and survival of larvae. The project aims to identify the fundamental links between recruitment and spawning stock, to enable predictions of recruitment for the management of adult stocks, safeguarding the future of the fishery.
Design and Development of DNA Oligonucleotide Microarrays (Biochips) for Fish Species Identification From Processed Food Products. Australia's seafood industry (valued at A$2 billion/annum) imports and exports a wide variety of fish and shellfish products. This industry is open to exploitation, specifically in respect of product labelling. A rapid and reliable method for identifying commercial and endangered fish species in seafood products is urgently needed for effective management and regulat ....Design and Development of DNA Oligonucleotide Microarrays (Biochips) for Fish Species Identification From Processed Food Products. Australia's seafood industry (valued at A$2 billion/annum) imports and exports a wide variety of fish and shellfish products. This industry is open to exploitation, specifically in respect of product labelling. A rapid and reliable method for identifying commercial and endangered fish species in seafood products is urgently needed for effective management and regulation of the industry. New genetic biochip technology enables any species or strains of an organism to be rapidly, and accurately, identified by non-experts. In collaboration with GeneScan Australia, this project applies this new technology to develop a diagnostic tool for checking the labelling of Australian seafood products.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
Movement, migration and social networks in wild shark populations. Sharks are vital components of marine ecosystems and contribute significantly to ecotourism and fisheries. Due to their slow rate of growth and reproduction, sharks are susceptible to over exploitation. A lack of knowledge regarding their behaviour and movement patterns is a key impediment to effective management. This project aims to examine social interactions and migration patterns of Port Jackson sharks using a unique combina ....Movement, migration and social networks in wild shark populations. Sharks are vital components of marine ecosystems and contribute significantly to ecotourism and fisheries. Due to their slow rate of growth and reproduction, sharks are susceptible to over exploitation. A lack of knowledge regarding their behaviour and movement patterns is a key impediment to effective management. This project aims to examine social interactions and migration patterns of Port Jackson sharks using a unique combination of genetic techniques, novel acoustic tag technology, behavioural manipulations and modern social network analysis. Once verified, the approach developed can be applied to other marine predators of particular management concern. The data generated will directly inform fisheries and conservation management policy.Read moreRead less
Linking fish recruitment and habitat use to ecosystem processes. Estuaries are transition zones between fresh and marine waters and form key nursery areas for fisheries. Understanding what makes an estuary a nursery area, and how dependent fish are on estuaries, is difficult because we lack vital information on fish recruitment and migrations. We will utilise chemical and genetic techniques to determine patterns of recruitment and migration of fish and link these patterns to biological character ....Linking fish recruitment and habitat use to ecosystem processes. Estuaries are transition zones between fresh and marine waters and form key nursery areas for fisheries. Understanding what makes an estuary a nursery area, and how dependent fish are on estuaries, is difficult because we lack vital information on fish recruitment and migrations. We will utilise chemical and genetic techniques to determine patterns of recruitment and migration of fish and link these patterns to biological characteristics of fish and physical variables of surrounding landscapes. Outcomes will provide managers with key landscape attributes than require conservation. Such information is vital for continued sustainability of fish and estuarine resources and will benefit rural coastal communities.Read moreRead less
Developing solutions to marine mammal interactions with long-line fisheries. Developing solutions to marine mammal interactions with long-line fisheries. This project aims to use innovative techniques to determine aspects of natural marine mammal behaviour that can be exploited, in conjunction with optimal fishing vessel operations, to minimise their interactions with commercial fisheries. Marine mammal interactions with commercial fisheries are a growing worldwide issue with both ecological (in ....Developing solutions to marine mammal interactions with long-line fisheries. Developing solutions to marine mammal interactions with long-line fisheries. This project aims to use innovative techniques to determine aspects of natural marine mammal behaviour that can be exploited, in conjunction with optimal fishing vessel operations, to minimise their interactions with commercial fisheries. Marine mammal interactions with commercial fisheries are a growing worldwide issue with both ecological (incidental bycatch and increased dependence on fisheries) and economic consequences (annual losses of tens of millions of dollars to the fishing industry). Successful solutions to reduce these interactions have remained elusive. Outcomes from this research are expected to be applicable worldwide, have substantial economic and ecological benefits, and ensure the sustainability of the fishing industry.Read moreRead less
Stocking of fish and prawns at ecologically determined densities into Australian estuaries. Increasing numbers of people like to go fishing, and to catch a fish, which translates into tourism income and aquaculture business. Restocking is a fisheries management option when the natural supply or survival of larvae is limited. This study will determine for the first time the ecologically appropriate abundance of small mulloway and prawns that an estuary can sustain. We will assess the extra eff ....Stocking of fish and prawns at ecologically determined densities into Australian estuaries. Increasing numbers of people like to go fishing, and to catch a fish, which translates into tourism income and aquaculture business. Restocking is a fisheries management option when the natural supply or survival of larvae is limited. This study will determine for the first time the ecologically appropriate abundance of small mulloway and prawns that an estuary can sustain. We will assess the extra effort needed to release larvae into particular key habitats, and develop new technologies to identify our larvae from the wild. Our findings will be relevant to restocking of Australia's inland rivers, which at present has little ecological basis.Read moreRead less