• AFSC/RACE/GAP/Palsson: Gulf of Alaska and Aleutian Islands Biennial Bottom Trawl Survey estimates of catch per unit effort, biomass, population at length, and associated tables

    The GOA/AI Bottom Trawl Estimate database contains abundance estimates for the Alaska Biennial Bottom Trawl Surveys conducted in the Gulf of Alaska and the Aleutian Islands in alternate years. The estimates build upon raw and summary data available from the RACEBASE database and include calculated catch-per-unit-effort (cpue)s for principal species of groundfish and key invertebrates for each survey region. The cpues are averaged by survey strata, and then average cpues are multiplied by stratum areas which results in estimates of biomass and numerical abundance. Length and age data are combined with abundance to estimate the population at length and sex and population at age and sex.

    Data and Resources

    Metadata Source

    Harvested from NMFS AFSC

    Additional Info

    Field Value
    Resource Type Dataset
    Metadata Date May 18, 2016
    Reference Date(s) (publication)
    Responsible Party (Point of Contact)
    Contact Email wayne.palsson@noaa.gov
    Access Constraints ["Access Constraints: \"FISMA Controls are in place to protect stored data from unauthorized access and/or disclosure\" | Use Constraints: Disclaimer - While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty."]
    Contact Name Palsson, Wayne
    Coupled Resource
    Frequency Of Update asNeeded
    Guid gov.noaa.nmfs.inport:22956
    Harvest Object Id ee99efb2-5f55-498d-aa93-d20feac1b8e2
    Harvest Source Id c6c69e0a-95c8-4f29-a8aa-55528aa80879
    Harvest Source Title NMFS AFSC
    Licence
    Metadata Language eng
    Metadata Type geospatial
    Progress onGoing
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1980

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