28146 Pollock Acoustic-Trawl Survey Biennial Bering Sea Project Published / External 22353 Midwater Assessment and Conservation Engineering Program Project In Work Alaska pollock (Gadus chalcogrammus), a semi-demersal gadoid fish species that inhabit the continental shelves of the North Pacific Ocean and Bering Sea, support one of the largest single species fisheries in the world. Sustainable management of this stock is based on fishing industry catch and effort information as well as fishery-independent information from acoustic and trawl surveys. The biennial acoustic-trawl survey is conducted between June and August by NOAA fisheries scientists aboard a U.S. government research vessel (currently NOAA ship Oscar Dyson) to monitor pollock on the eastern Bering Sea shelf and slope. Results from this acoustic-trawl survey provide midwater pollock abundance and spatial distribution information by length and age from Bristol Bay in the United States, to Cape Navarin, Russia, over bottom depths of approximately 50 m to 1000 m. Temperature, salinity and other water column properties are measured. Midwater and bottom trawl catches associated with the acoustic backscatter are enumerated by species or species group. Preliminary spatial distributions of euphausiid backscatter are also estimated. The midwater pollock population estimates from the acoustic-trawl survey is one of three key inputs for the pollock stock assessment model, which in turn guides the North Pacific Fisheries Management Council’s annual decisions on U.S. Bering Sea pollock stock management. (Additional key inputs are demersal pollock population estimates from an annual NOAA Bering Sea bottom trawl survey, and biological data from the pollock fishing industry.) Acoustic-trawl survey, biennial, summer, midwater, walleye pollock, Gadus chalcogrammus, Bering Sea, Alaska, Cape Navarin, continental shelf Geographic Area Bering Sea: http://www.marineregions.org/gazetteer.php?p=details&id=4310 Alaska Fisheries Science Center Seattle WA USA Data Steward 2015-10-29 Person Towler, Rick rick.towler@noaa.gov Distributor 2015 Person Anderson, Charles charles.anderson@noaa.gov 325 Broadway, E/GC3 Boulder CO 33149 303-497-4742 Metadata Contact 2015-10-29 Person McCarthy, Abigail abigail.mccarthy@noaa.gov Point of Contact 2015-10-28 Person Honkalehto, Taina taina.honkalehto@noaa.gov Bering Sea: http://www.marineregions.org/gazetteer.php?p=details&id=4310 Continuing 2004 Unclassified Go to https://www.ngdc.noaa.gov/mgg/wcd/ or email Anderson, Charles (charles.anderson@noaa.gov) None https://www.ncei.noaa.gov/ 28196 Data Set 28407 Data Set 28408 Data Set 28341 Data Set 28313 Data Set 65610 Data Set 65609 Data Set 65623 Data Set 65624 Data Set 65625 Data Set 76708 Data Set 77782 Data Set 28307 Data Set gov.noaa.nmfs.inport:28146 Abigail McCarthy 2015-10-23T13:56:56 Abigail McCarthy 2026-01-30T23:53:06 2026-01-30 Alaska Fisheries Science Center AFSC 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA https://www.afsc.noaa.gov 0700-1700 Pacific Time 1001 Public No 2016-05-18 1 Year 2017-05-18