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41 st SAW Assessment Report 7 A. SUMMER FLOUNDER Stock Assessment Update And Biological Reference Point Estimation A report of the

By Mark Terceiro Chairman and Woods Hole Ma

Abstract

The Terms of Reference (ToR) for SAW 41 were completed as summarized below: 1) Update the summer flounder assessment models (i.e. ADAPT VPA and AGEPRO projection) using the same configurations as those used in the 2004 SAW Southern Demersal Working Group (WG) assessment update. The assessment was updated using fishery catches through 2004, survey indices through 2004/2005, and the same ADAPT VPA and AGEPRO model configurations as in the 2004 update. Fully recruited fishing mortality (ages 3-5) was estimated by ADAPT VPA to be 0.40 in 2004, above the current overfishing definition reference point (Fthreshold = Fmax = 0.26) and above the updated estimate of Fthreshold = 0.276. Total stock biomass on Jan. 1, 2005 was estimated to be 54,900 mt, slightly above the biomass threshold (53,200 mt). Forecasts indicate that the currently specified TAL of 13,744 mt (30.3 million lbs) in 2005 will result in a median F in 2005 = 0.40, and the currently specified TAL of 14,969 mt (33.0 million lbs) in 2006 will result in a median F in 2006 = 0.41. 2) Estimate biological reference points derived by yield and SSB per recruit analysis and by stock-recruitment modeling, following the procedures adopted by the 2002 Workin

Year: 2008
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