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

Additional Info

Field Value
Last Updated June 10, 2017, 17:46
Created June 10, 2017, 17:46
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-email wayne.palsson@noaa.gov
coupled-resource []
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frequency-of-update asNeeded
guid gov.noaa.nmfs.inport:22956
licence []
metadata-date 2016-05-18T19:28:31
metadata-language eng
progress onGoing
resource-type dataset
responsible-party [{"name": "", "roles": ["pointOfContact", ""]}, {"name": "Alaska Fisheries Science Center", "roles": ["custodian"]}]
spatial-data-service-type
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spatial_harvester true
temporal-extent-begin 1980