Tropical Tunas Working Group Recife, April 2007

Main topics studied 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

StatisticsStatistics

• 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 »1- Total amount landed in Abidjan

« Faux poisson »2- Quantities according to the fleet

« Faux poisson »2- Quantities according to the fleet

% 'Faux Thon'

Tons % Tons % %Ghana and associated 10 556 58% 25 136 23% 42%France 2 424 13% 27 044 25% 9%Spain and associated 5 252 29% 56 124 52% 9%All fleets 18 231 100% 108 305 100% 17%

Average 2004-2006

Fleet'Faux Thons' Unloaded and

transshipped tuna

« Faux poisson »3- Species composition

« Faux poisson »3- Species composition

1997-1998 sampling 2004-2005 sampling

« Faux poisson »4- Size composition

« Faux poisson »4- Size composition

Major Tunas Minor Tunas

• 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?)

« Faux poisson »5- Conclusion

« Faux poisson »5- Conclusion