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DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Workshop Introduction Michael Phelan, Coastal Fisheries Scientist.

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Presentation on theme: "DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Workshop Introduction Michael Phelan, Coastal Fisheries Scientist."— Presentation transcript:

1 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Workshop Introduction Michael Phelan, Coastal Fisheries Scientist

2 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Black Jewfish Black jewfish is the largest tropical sciaenid. Fish grow to 154 cm and ~50 kg. –Large size = revered by ind., rec., and com fishers. Fillets of a 130 cm fish = 70 restaurant serves.

3 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Many examples from across the globe that indicates target fishing aggregations may: –truncate size/age structure (e.g. Beets & Friedlander 1992). –decrease reproductive capacity (e.g. Eckland et al. 2000). –alter genetic composition (e.g. Altukhov & Salmenkova 1991). –result in the total loss of aggregations (e.g. Koenig et al. 1997). Pro-active stance taken to avoid the same occurring in NT waters. Need for jewfish research

4 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES The four projects focusing on NT black jewfish being undertaken by NT Fisheries, AIMS & TAFI. Funded by NT Government and the Fisheries Research and Development Corporation. Collaborative Projects

5 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Acknowledgements Project indebted to many people and organisations: Ind., rec., com. fishers and fishing tour operators. Special thanks to: –Tony Franklin, –Adam Collins, –Shane Richardson, –Norm Heditch; –Arafura Pearls, –Marine Harvest; –Dundee, Arafura & Equinox Fishing Charters.

6 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Project 1: Age/Reproduction Aim: Determine the age structure and reproductive strategy of black jewfish. –Undertaken by DPIFM. –Preliminary results to be presented by Michael Phelan.

7 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Project 2: Acoustic Tagging Aim: Determine the degree of movement between two known aggregation sites. –Project undertaken by TAFI and DPIFM. –Preliminary results to be presented by Michael Phelan

8 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Aim: Profile the characteristics of the two aggregation study sites. –Project undertaken by AIMS and DPIFM –Preliminary results to be presented by Dr Mark Meekan Project 3: Habitat Mapping

9 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES Aim: Pilot study to define the spatial structure of black jewfish stocks. –Project undertaken by DPIFM and AIMS –Preliminary results to be presented by Dr Mark Meekan. Project 4: Otolith Microchemistry

10 DEPARTMENT OF PRIMARY INDUSTRY, FISHERIES AND MINES These are preliminary results……the results are subject to change……so why present now? This workshop provides the opportunity to: 1. Contribute to the final analysis of the data, and 2. Guide the final report’s recommendations. Project objectives


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