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Alaska Groundfish Research Results

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2021 Assessment Of The Skate Stock Complex In The Bering Sea And Aleutian Islands

The Bering Sea and Aleutian Islands (BSAI) skate complex is managed in aggregate, with a single set of harvest specifications applied to the entire complex. However, to generate the harvest recommendations the stock is divided into two units.
February 08, 2022 - Assessments ,

2021 Assessment Of The Rex Sole Stock In The Gulf of Alaska

The key results of the assessment, based on the author’s preferred (base case) model, are compared to the key specifications from 2020 in the table below. A Tier 3a approach was used to calculate recommended quantities for the 2021 assessment.
February 07, 2022 - Assessments ,

2021 Assessment Of The Walleye Pollock Stock In The Gulf Of Alaska

Walleye pollock (Gadus chalcogrammus; hereafter referred to as pollock) is a semi-pelagic schooling fish widely distributed in the North Pacific Ocean. Pollock in the central and western Gulf of Alaska (GOA) are managed as a single stock independently...
February 07, 2022 - Assessments ,

2021 Assessment Of The Pacific Ocean Perch Stock In The Gulf Of Alaska

Pacific ocean perch in the Gulf of Alaska are assessed on a biennial stock assessment schedule to coincide with the availability of new survey data. For Gulf of Alaska rockfish in on-cycle (odd) years, we present a full stock assessment document with...
February 07, 2022 - Assessments ,

2021 Assessment Of The Pacific Cod Stock In The Gulf Of Alaska

Pacific cod (Gadus macrocephalus) is a transoceanic species, occurring at depths from shoreline to 500 m. The southern limit of the species’ distribution is about 34° N latitude, with a northern limit of about 63° N latitude. Pacific cod is distributed...
February 07, 2022 - Assessments ,

2021 Assessment Of The Other Rockfish Stock Complex In The Gulf Of Alaska

The Other Rockfish (OR) complex in the Gulf of Alaska (GOA) is assessed on a biennial stock assessment schedule to coincide with the availability of new trawl survey biomass estimates.
February 07, 2022 - Assessments ,

2021 Assessment Of Northern And Southern Rock Sole (Lepidopsetta Polyxstra And Bilineata) Stocks In The Gulf Of Alaska

The Gulf of Alaska (GOA) northern and southern rock sole assessment is conducted on a 4-year assessment cycle following the stock assessment prioritization schedule. During years when a full assessment is not completed, a partial assessment is conducted.
February 07, 2022 - Assessments ,

2021 Assessment Of The Northern Rockfish Stock In The Gulf Of Alaska

We use a statistical age-structured model as the primary assessment tool for GOA northern rockfish which qualifies as a Tier 3 stock. This assessment consists of a population model, which uses survey and fishery data to generate a historical time...
February 07, 2022 - Assessments ,

2021 Status Of Forage Species In The Gulf Of Alaska Region

A report on the status of forage species in the Gulf of Alaska (GOA) region is prepared on a biennial basis and presented to the GOA Plan Team and the North Pacific Fishery Management Council (NPFMC) in even years. This report is not intended as a...
February 07, 2022 - Assessments ,

2021 Assessment Of The Flathead Sole Stock In The Gulf Of Alaska

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 two years. Please refer to the 2017 full...
February 07, 2022 - Assessments ,