Assessment of the shallow-water flatfish stock complex in the Gulf of Alaska
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Assessment of the shallow-water flatfish stock complex in the Gulf of Alaska

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  • Alternative Title:
    GOA Chapter 4
  • Description:
    Survey abundance estimates for the shallow-water complex were higher in 2017 compared to 2015 for all species except Yellowfin sole and Butter sole. The random effects model was used to estimate current biomass for estimating the OFL and ABC values. The total 2018 biomass estimate is 339,152 t an increase from the 2016 assessment estimate of 301,047 t. The survey biomass estimate for the shallow-water complex increased from 265,116 t in 2015 to 285,047 t in 2017. Butter sole, English sole and southern rock sole survey biomass declined, while all other species increased. The random effects model estimates for current biomass of shallow-water flatfish without rock sole were higher than estimated in the 2015 assessment. The model estimates of current biomass for both Southern and Northern rock sole were higher than last year as well (Bryan, et al. 2017).
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