Assessment of the sablefish stock in Alaska
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Assessment of the sablefish stock in Alaska
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Assessment of the sablefish stock in Alaska
Details:
  • Alternative Title:
    BSAI Chapter 3
  • Personal Author:
  • Description:
    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 was 2015. The fishery abundance index decreased 23% from 2015 to 2016 and is the time series low (the 2017 data are not available yet). There was a new Gulf of Alaska (GOA) trawl survey in 2017 which increased 89% from 2015 to 2017. Spawning biomass is projected to increase rapidly from 2018 to 2022, and then stabilize. Sablefish are managed under Tier 3 of NPFMC harvest rules. Reference points are calculated using recruitments from 1977-2013. The updated point estimates of B40%, F40%, and F35% from this assessment are 98,332 t (combined across the EBS, AI, and GOA), 0.096, and 0.114, respectively. Projected female spawning biomass (combined areas) for 2018 is 88,928 t (90% of B40%, or B36%), placing sablefish in subtier “b” of Tier 3. The maximum permissible value of FABC under Tier 3b is 0.086, which translates into a 2018 ABC (combined areas) of 25,583 t. The OFL fishing mortality rate is 0.102 which translates into a 2018 OFL (combined areas) of 30,211 t. Model projections indicate that this stock is not subject to overfishing, overfished, nor approaching an overfished condition.
  • Keywords:
  • Document Type:
    Stock Assessment
  • Place as Subject:
  • Collection(s):
    National Marine Fisheries Service (NMFS)
  • Main Document Checksum:
  • File Type:
  • Supporting Files:
    No Additional Files
    1. Filetype[PDF - 10.95 MB]
      Personal Author:
      Thompson, Grant G. (Grant Garrison)
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      Relative to the November edition of last year’s BSAI SAFE report, the following substantive changes have been made in the eastern Bering Sea (EBS) Pacific cod stock assessment. Changes in the Input Data: 1) Catch data for 1991-2016 were updated, an...
      File Type:
      Filetype[PDF - 10.95 MB]
    2. Filetype[PDF - 19.34 KB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      NOTE: In accordance with the approved schedule, no assessment was conducted for this stock this year, however, a full stock assessment will be conducted in 2018. Until then, the values generated from the previous stock assessment will be rolled over ...
      File Type:
      Filetype[PDF - 19.34 KB]
    3. Filetype[PDF - 3.60 MB]
      Personal Author:
      Ianelli, James N.; Kotwicki, Stan; Honkalehto, Taina; Holsman, Kirstin; Fissel, Ben;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      This chapter covers the Eastern Bering Sea (EBS) region—the Aleutian Islands region (Chapter 1A) and the Bogoslof Island area (Chapter 1B) are presented separately (this year only updates–“full” assessments expected in 2018).
      File Type:
      Filetype[PDF - 3.60 MB]
    4. Filetype[PDF - 69.55 KB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      In 2005, BSAI rockfish were moved to a biennial assessment schedule with full assessments in even years to coincide with the frequency of trawl surveys in the Aleutian Islands (AI) and the eastern Bering Sea (EBS) slope. In 2017, the scheduled freque...
      File Type:
      Filetype[PDF - 69.55 KB]
    5. Filetype[PDF - 715.21 KB]
      Personal Author:
      Thompson, Grant G. (Grant Garrison); Palsson, Wayne;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      Relative to the November edition of last year’s BSAI SAFE report, the following substantive changes have been made in the Aleutian Islands (AI) Pacific cod stock assessment: Catch data for 1991-2016 were updated, and preliminary catch data for 2017...
      File Type:
      Filetype[PDF - 715.21 KB]
    6. Filetype[PDF - 26.05 KB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      This document provides a summary of the 2017 recommended ABCs and OFLs relative to the 2016 recommendations for Other flatfish in the Bering Sea/Aleutian Islands (BSAI).
      File Type:
      Filetype[PDF - 26.05 KB]
    7. Filetype[PDF - 72.71 KB]
      Personal Author:
      Spencer, Paul D.; Ianelli, James N.;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      In 2005, BSAI rockfish were moved to a biennial assessment schedule with full assessments in even years to coincide with the frequency of trawl surveys in the Aleutian Islands (AI) and the eastern Bering Sea (EBS) slope. In 2017, the scheduled freque...
      File Type:
      Filetype[PDF - 72.71 KB]
    8. Filetype[PDF - 23.65 KB]
      Personal Author:
      Spies, Ingrid B.; Spencer, Paul D.; Ianelli, James N.; Rooper, Chris N.;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      [NOTE: In accordance with the approved schedule, no assessment was conducted for this stock this year, however, a full stock assessment will be conducted in 2018. Until then, the values generated from the previous stock assessment (below) will be rol...
      File Type:
      Filetype[PDF - 23.65 KB]
    9. Filetype[PDF - 22.32 KB]
      Personal Author:
      Ianelli, James N.; Barbeaux, Steven .J.; McKelvey, D.;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      NOTE: In accordance with the approved schedule, no assessment was conducted for this stock this year, however, a full stock assessment will be conducted in 2018. Until then, the values generated from the previous stock assessment (below) will be roll...
      File Type:
      Filetype[PDF - 22.32 KB]
    10. Filetype[PDF - 297.72 KB]
      Personal Author:
      Ormseth, Olav A.
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      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. Harvest...
      File Type:
      Filetype[PDF - 297.72 KB]
    11. Filetype[PDF - 137.48 KB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      "Flathead sole" as currently managed by the North Pacific Fishery Management Council (NPFMC) in the Bering Sea and Aleutian Islands (BSAI) represents a two-species complex consisting of true flathead sole (Hippoglossoides elassodon) and its morpholog...
      File Type:
      Filetype[PDF - 137.48 KB]
    12. Filetype[PDF - 2.69 MB]
      Personal Author:
      Wilderbuer, Thomas K.; Nichol, Daniel G.; Ianelli, James N.;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      The assessment updates last year’s with results and management quantities that are higher than the 2016 assessment primarily due to 1) including 2016 fishery weight-at-age information, 2) including two more years in the spawner-recruit time-series,...
      File Type:
      Filetype[PDF - 2.69 MB]
    13. Filetype[PDF - 178.65 KB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      The assessment of Bering Sea and Aleutian Islands (BSAI) Kamchatka flounder has been moved to a biennial schedule according to the stock assessment prioritization schedule. A partial assessment was done for BSAI Kamchatka flounder this year. In parti...
      File Type:
      Filetype[PDF - 178.65 KB]
    14. Filetype[PDF - 159.10 KB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      Northern rock sole (Lepidopsetta polyxystra) are assessed on a biennial stock assessment schedule as part of the National Marine Fisheries Service assessment prioritization plan implemented in 2017. For Bering Sea/Aleutian Islands partial assessments...
      File Type:
      Filetype[PDF - 159.10 KB]
    15. Filetype[PDF - 1.54 MB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      The Stock Assessment and Fishery Evaluation (SAFE) report summarizes the best available scientific information concerning the past, present, and possible future condition of the stocks, marine ecosystems, and fisheries that are managed under Federal ...
      File Type:
      Filetype[PDF - 1.54 MB]
    16. Filetype[PDF - 20.34 KB]
      Personal Author:
      Tribuzio, Cindy A.; Echave, Katy; Rodveller, Cara J.; Hulson, Peter-John;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      [NOTE: In accordance with the approved schedule, no assessment was conducted for this stock this year, however, a full stock assessment will be conducted in 2018. Until then, the values generated from the previous stock assessment (below) will be rol...
      File Type:
      Filetype[PDF - 20.34 KB]
    17. Filetype[PDF - 46.32 KB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      [NOTE: In accordance with the approved schedule, no assessment was conducted for this stock this year, however, a full stock assessment will be conducted in 2018. Until then, the values generated from the previous stock assessment will be rolled over...
      File Type:
      Filetype[PDF - 46.32 KB]
    18. Filetype[PDF - 116.99 KB]
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      The Bering Sea and Aleutian Islands (BSAI) arrowtooth flounder (Atheresthes stomias) stock is managed in Tier 3a and is assessed on a biennial basis. Survey data for the BSAI comes from the BSAI shelf survey which takes place annually, the Aleutian I...
      File Type:
      Filetype[PDF - 116.99 KB]
    19. Filetype[PDF - 1.27 MB]
      Personal Author:
      Wilderbuer, Thomas K.; Nichol, Daniel G.;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      The survey increased 15% from 2016 to 2017 and is now just below the long-term average. The assessment model estimate of 3+ total biomass for 2018 is 417,300 t and the projected female spawning biomass for 2018 is 191,460 t, a value that is well-abov...
      File Type:
      Filetype[PDF - 1.27 MB]
    20. Filetype[PDF - 263.12 KB]
      Personal Author:
      Spies, Ingrid B.; Aydin, Kerim; Nichol, Dan; Palsson, Wayne; Hoff, Gerald Raymond, 1962-; TenBrink, Todd T.;
      Published Date:
      2017
      Series:
      Bering Sea and Aleutian Islands Stock Assessments
      Description:
      The estimated ABC and OFL values for 2018 and 2019 in this update are slightly lower than the values for 2017 and 2018 produced in the 2016 assessment because the biomass estimate of sculpins in the Bering Sea shelf were lower than the 2016 estimate ...
      File Type:
      Filetype[PDF - 263.12 KB]

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