Yellowfin Sole Stock in the Bering Sea and Aleutian Islands Thomas K
Chapter 4 Assessment of the Yellowfin sole stock in the Bering Sea and Aleutian Islands Thomas K. Wilderbuer, Daniel G. Nichol and James Ianelli Executive Summary Summary of Changes in Assessment Inputs Changes to the input data 1) 2011 fishery age composition. 2) 2011 survey age composition. 3) 2012 trawl survey biomass point estimate and standard error. 4) Estimate of the discarded and retained portions of the 2011 catch. 5) Estimate of total catch made through the end of 2012. Changes to the assessment methodology No changes to the assessment methodology. The assessment updates last year’s with results and management quantities that are very similar to the 2011 assessment. Yellowfin sole continue to be well- above BMSY and the annual harvest is below the ABC level. Summary of Results As estimated or As estimated or specified last year for: recommended this year for: Quantity 2012 2013 2013 2014 M (natural mortality rate) 0.12 0.12 0.12 0.12 Tier 1a 1a 1a 1a Projected total (age 6+) biomass (t) 1,945,000 1,985,000 1,963,000 1,960,000 Female spawning biomass (t) 592,700 604,900 582,300 601,000 Projected B0 954,100 966,900 BMSY 341,000 353,000 FOFL 0.114 0.114 0.112 0.112 maxFABC 0.104 0.104 0.105 0.105 FABC 0.104 0.104 0.105 0.105 OFL (t) 222,000 226,400 220,000 219,000 maxABC (t) 203,000 206,700 206,000 206,000 ABC (t) 203,000 206,700 206,000 206,000 As determined last year for: As determined this year for: Status 2011 2012 2012 2013 Overfishing No No No No Overfished No No No No Approaching overfished No No No No SSC Comments For the BSAI, the SSC’s recommended priorities for CIE reviews are yellowfin sole, northern rock sole, and Greenland turbot.
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