Tropical Tunas Working Group Recife, April 2007

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Presentation transcript:

Tropical Tunas Working Group Recife, April 2007

Main topics studied Update of basic statistics, CAS and tagging database Estimation of landings that are directed out of the canning factories (“faux-poisson”) Review of new biological information and fishery indicators for YFT, BET and SKJ Indicators relevant to multi-species fisheries and ecosystems Recommendations

Statistics Task 1 and 2: revisions following the work done in Sète (2006) Sizes: update and building of the CAS for YFT and SKJ Tagging: progress on improving the tropical tunas databases; still work to be done for YFT and SKJ by Secretariat and scientists Preparation of BET assessment: revision of the “fisheries” definition and data preparation for Multifan-CL analysis

« Faux-poisson » 1- Total amount landed in Abidjan

« Faux poisson » 2- Quantities according to the fleet

« Faux poisson » 3- Species composition 1997-1998 sampling 2004-2005 sampling

« Faux poisson » 4- Size composition Major Tunas Minor Tunas

« Faux poisson » 5- Conclusion These landings are quite important and should be taken in account for assessments Ways to avoid risks of double counting of catches (transshipments, observers) have to be axamined Studies to better estimate the species composition by fleet should be continued The way to take them in account in the statistics has still to be defined (discards, new category?)