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Stock assessment update of Summer Flounder for 2015
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2015
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Description:"This assessment of summer flounder (Paralichthys dentatus) is an update through 2014 of commercial and recreational fishery catch data, research survey indices of abundance, and the analyses of those data. The summer flounder stock was not overfished but overfishing was occurring in 2014 relative to the biological reference points from the 2013 Stock Assessment Workshop (SAW) 57 benchmark assessment (NEFSC 2013; Figures 1-4). Fishing mortality on the fully selected age 4 fish ranged between 0.793 and 1.776 during 1982-1996 then decreased from 0.867 in 1997 to 0.284 in 2007. Since 2007 the fishing mortality rate has increased to 0.359 in 2014, 16% above the 2013 SAW 57 FMSY proxy = F35% = 0.309 (Figures 1-3). The 90% confidence interval for F in 2014 was 0.274 to 0.435. Spawning stock biomass (SSB) decreased from 24,134 mt in 1982 to 5,394 mt in 1989 and then increased to peaks of 50,357 mt in 2003 and 47,499 mt in 2010. SSB was estimated to be 40,323 mt in 2014, 65% of the 2013 SAW 57 SSBMSY proxy = SSB35% = 62,394 mt, and 29% above the 2013 SAW 57 1/2 SSBMSY proxy = 1/2 SSB35% = 31,197 mt (Figures 1-2, 4). The 90% confidence interval for SSB in 2014 was 35,486 to 49,918 mt. The average recruitment from 1982 to 2014 is 41 million fish at age 0. The 1983 and 1985 year classes are the largest in the assessment time series, at 75 and 62 million fish, while the 1988 year class is the smallest at only 10 million fish. After four below-average year classes in 2010-2013 (36, 20, 23, and 27 million fish), the 2014 year class is currently estimated to be average at 41 million fish (Figures 4-5)"--State of stock. [doi:10.7289/V57D2S4G (http://dx.doi.org/10.7289/V57D2S4G)]
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Content Notes:by Mark Terceiro.
"Web version posted August 12, 2015"--Document's home page: http://www.nefsc.noaa.gov/publications/crd/crd1513/
"August 2015."
doi:10.7289/V57D2S4G (http://dx.doi.org/10.7289/V57D2S4G)
System requirements: Adobe Acrobat Reader.
Includes bibliographical refeerences (page 6).
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