Results of the 2016 eastern Bering Sea continental shelf bottom trawl survey of groundfish and invertebrate resources
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields

Dates

to

Document Data
Library
People
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Results of the 2016 eastern Bering Sea continental shelf bottom trawl survey of groundfish and invertebrate resources

Filetype[PDF-14.73 MB]


Select the Download button to view the document
This document is over 5mb in size and cannot be previewed

Details:

  • Alternative Title:
    2016 eastern Bering Sea continental shelf bottom trawl survey of groundfish and invertebrate resources
  • Personal Author:
  • Corporate Authors:
  • NOAA Program & Office:
  • Description:
    The Resource Assessment and Conservation Engineering Division of the Alaska Fisheries Science Center conducts annual bottom trawl surveys to monitor the condition of the demersal fish and crab stocks of the eastern Bering Sea continental shelf. The standard study area encompasses a major portion of the eastern Bering Sea shelf (depths between 20 and 200 m) from the Alaska Peninsula north to approximately the latitude of St. Matthew Island (60° 50' N). In 2016, two chartered trawlers, the 38-m FV Vesteraalen and the 43.5-m FV Alaska Knight, surveyed this area. Demersal populations were sampled by trawling for 30 minutes at stations centered within 37.04 × 37.04 km (20 × 20 nautical miles (nmi)) grid cells covering the survey area. At each station, the species composition of the catch was determined, and length distributions and age structure samples were collected from ecologically and commercially important species. Three-hundred seventy-six standard survey stations were sampled successfully. A total of 94 fish taxa and 232 invertebrate taxa were identified in catches from the EBS survey. The combined estimated biomass of walleye pollock (Gadus chalcogrammus), Pacific cod (Gadus macrocephalus), yellowfin sole (Limanda aspera), and northern rock sole (Lepidopsetta polyxystra) was estimated to be 10.2 million metric tons (t), which was 82% of the total fish biomass. The biomass of invertebrates was composed primarily of echinoderms (1.6 million t) and crustaceans (0.7 million t). Survey results presented in this report include abundance estimates for fishes and invertebrates, geographic distributions and size compositions of selected fish species, and contour plots of surface and bottom temperatures during the survey sampling period. Appendices provide station data, catch data summarized by station, taxon listings, and details of size composition for various fish species of commercial interest. [doi:10.7289/V5/TM-AFSC-352 (https://doi.org/10.7289/V5/TM-AFSC-352)]
  • Content Notes:
    J. Conner and R. R. Lauth.

    "May 2017."

    System requirements: Adobe Acrobat Reader.

    Includes bibliographical references (pages 76-80).

  • Keywords:
  • Series:
  • DOI:
  • Document Type:
  • Place as Subject:
  • Rights Information:
    Public Domain
  • Compliance:
    Submitted
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files
More +

You May Also Like

Checkout today's featured content at repository.library.noaa.gov

Version 3.26.1