The Gulf of Alaska flathead sole stock is assessed every four years and was last assessed in 2017. In years without a full assessment, we present an executive summary to recommend harvest levels for the next twoyears. Please refer to the 2017 full stock assessment report for further information regarding the assessment model (Turnock, et al., 2017, available online at https://www.afsc.noaa.gov/REFM/Docs/2017/GOAflathead.pdf). A full stock assessment document with updated assessment and projection model results will be presented in 2021. Flathead sole is assessed using an age-structured model and Tier 3 determination. Thus, the single species projection model was run using parameter values from the accepted 2017 flathead sole assessment model (Turnock et al. 2017), together with updated catch information for 2017-2018, to predict stock status for flathead sole in 2019 and 2020 and to make ABC recommendations for those years. Projections are conducted using numbers-at -age for flathead sole from age 3-21+ and historical recruitment of age 3 individuals is used to calculate OFL’s and ABC’s.
[NOTE: In accordance with the approved assessment schedule, no stock assessment was conducted for this stock this year, however, a full stock assessme...
[NOTE: In accordance with the approved assessment schedule, no stock assessment was conducted for this stock this year, however, a full stock assessme...
[NOTE: In accordance with the approved assessment schedule, no stock assessment was conducted for this stock this year, however, a full stock assessme...
The Gulf of Alaska rex sole stock is assessed every four years and was last assessed in 2017. In between the full assessment years, we present an exec...
Relative to last year’s assessment, the following changes have been made in the current assessment: Changes in the input data-- 1.Federal and state ...
Rockfish have historically been assessed on a biennial stock assessment schedule to coincide with the availability of new trawl survey data (odd years...
The Gulf of Alaska (GOA) northern and southern rock sole assessment has been moved to a 4-year assessment cycle per the stock assessment prioritizatio...
Rockfish are assessed on a biennial stock assessment schedule to coincide with the availability of new survey data. For Gulf of Alaska rockfish in alt...
In 2017, the scheduled frequency for some stock assessments was changed in response to the National Stock Assessment Prioritization effort (Methot 201...
[NOTE: In accordance with the approved assessment schedule, no stock assessment was conducted for this stock this year, however, a full stock assessme...
The scheduled frequency for some stock assessments was recently changed in response to the National Stock Assessment Prioritization effort (Methot 201...
The demersal shelf rockfish (DSR) complex (yelloweye, quillback, copper, rosethorn, China, canary, and tiger rockfish) is assessed on a triennial cycl...
The shallow-water flatfish stock complex in the Gulf of Alaska (GOA) includes Alaska plaice (Pleuronectes quadrituberculatus), butter sole (Pleuronect...
North Pacific Fishery Management Council. Plan Team for the Groundfish Fisheries of the Gulf of Alaska
2018 | Gulf of Alaska Stock Assessments
Description:
The National Standard Guidelines for Fishery Management Plans published by the National Marine Fisheries Service (NMFS) require that a stock assessmen...
[NOTE: In accordance with the approved assessment schedule, no stock assessment was conducted for this stock this year, however, a full stock assessme...
New survey data in 2018 are highly contrasting, with the 2018 Shelikof Strait acoustic survey indicating high biomass, and the ADFG trawl survey indic...
The Gulf of Alaska deepwater flatfish complex (consisting of Dover sole, Greenland turbot, and deepsea sole) is assessed every four years and was last...
The Gulf of Alaska (GOA) arrowtooth flounder (ATF, Atheresthes stomias) stock is managed in Tier 3a and is assessed on a biennial basis to coincide wi...
The longline survey abundance index increased 9 % from 2017 to 2018 following a 14% increase in 2017 from 2016. The lowest point of the time series wa...
North Pacific Fishery Management Council. Plan Team for the Groundfish Fisheries of the Gulf of Alaska
2016 | Gulf of Alaska Stock Assessments
Description:
The demersal shelf rockfish (DSR) complex (yelloweye, quillback, copper, rosethorn, canary, China, and tiger rockfish) is assessed on a biennial cycle...
The longline survey abundance index increased 14% from 2016 to 2017 following a 28% increase in 2016 from 2015. The lowest point of the time series wa...
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