Results of the acoustic-trawl survey of walleye pollock (Gadus chalcogrammus) in Shelikof Strait, Chirikof Shelfbreak, and Marmot Bay March 2025 (DY25-03)

Details

• Personal Author:
  Jones, Darin ; Levine, Mike
• NOAA Program & Office:
  NMFS (National Marine Fisheries Service) ; AFSC (Alaska Fisheries Science Center)
• Description:
  Scientists from the Alaska Fisheries Science Center conducted acoustic-trawl surveys in the Gulf of Alaska during winter 2025 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus) at three of their primary spawning grounds. These pre-spawning walleye pollock surveys covered the Shelikof Strait, Chirikof Shelfbreak, and Marmot Bay regions. Abundance estimates were based on an analysis where backscatter was attributed to all trawl-captured species and size classes using the biological length-frequency data from the nearest trawl locations. Abundance estimates also included a correction for escapement of fishes and other catch from the survey trawl (i.e., net selectivity).
• Keywords:
  • Acoustic trawl surveys
  • Gulf of Alaska
  • Walleye pollock
  • Alaska Fisheries Science Center
  • Midwater Assessment and Conservation Engineering
• Series:
  NOAA technical memorandum NMFS-AFSC 526
• DOI:
  https://doi.org/10.25923/wgr0-2a82
• Format:
  pdf
• Document Type:
  Technical Memorandum
• License:
  https://creativecommons.org/publicdomain/zero/1.0/
• Rights Information:
  CC0 Public Domain
• Compliance:
  Submitted
• Download URL:
  https://repository.library.noaa.gov/view/noaa/76547/noaa_76547_DS1.pdf
• File Type:
  [PDF - 4.97 MB]
• Collection(s):
  National Marine Fisheries Service (NMFS)
• Main Document Checksum:
  urn:sha-512:110dce8d297e39353651152a993e26bb873894293744b21042057c2c120d0be15a2b4f782ab72347e61872df459698fd5e7c21482aed996fc39789cfed2ae3ad