Acoustic-Trawl Survey of Walleye Pollock in the Gulf of Alaska (DY1503, EK60)
The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Shelikof Strait, Marmot Bay, and Chirikof shelf break areas of the Gulf of Alaska (GOA) during late winter/early spring of 2015 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey was conducted 15-31 March (Marmot Bay, 15-16 March; Shelikof Strait 17-23 March; Chirikof shelf break, 23-24 March), starting and ending in Kodiak, Alaska. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation. The primary instrument for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz).
Resources
3 resources available
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Water Column Sonar Data Map Viewer
TEXT/HTML -
Global Change Master Directory (GCMD) Keywords
TEXT/HTML -
International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
TEXT/HTML
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{ "fn": "DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center", "@type": "vcard:Contact", "hasEmail": "mailto:chris.wilson@noaa.gov" } |
| describedByType | application/octet-steam |
| description | The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Shelikof Strait, Marmot Bay, and Chirikof shelf break areas of the Gulf of Alaska (GOA) during late winter/early spring of 2015 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey was conducted 15-31 March (Marmot Bay, 15-16 March; Shelikof Strait 17-23 March; Chirikof shelf break, 23-24 March), starting and ending in Kodiak, Alaska. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation. The primary instrument for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz). |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Water Column Sonar Data Map Viewer", "accessURL": "http://maps.ngdc.noaa.gov/viewers/water_column_sonar/", "mediaType": "text/html", "description": "Interactive map viewer to allow discovery and access to water column sonar data", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Global Change Master Directory (GCMD) Keywords", "accessURL": "https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords", "mediaType": "text/html", "description": "The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)", "accessURL": "https://iho.int/", "mediaType": "text/html", "description": "Publication of Sea Areas is maintained by IHO.", "describedByType": "application/octet-stream" } ] |
| identifier | https://data.noaa.gov/waf/NOAA/NESDIS/NGDC/MGG/Sonar_Water_Column/iso/xml/DY1503_EK60.xml |
| issued | 2015-03-15T00:00:00.000+00:00 |
| keyword |
[ "Earth Science > Oceans > Ocean Acoustics > Acoustic Scattering", "Earth Science > Oceans > Aquatic Sciences > Fisheries", "Earth Science > Oceans > Ocean Acoustics", "Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic", "Earth Science > Biosphere > Ecosystems > Marine Ecosystems", "Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic", "Earth Science > Biosphere > Ecosystems > Aquatic Ecosystems", "Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry", "Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography", "Gulf of Alaska", "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce", "DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce", "DOC/NOAA/NMFS > National Marine Fisheries Service, NOAA, U.S. Department of Commerce", "GEOGRAPHIC REGION > GLOBAL", "Vertical Location > VERTICAL LOCATION > SEA FLOOR", "In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System" ] |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2015-03-15T00:00:00.000+00:00 |
| publisher |
{ "name": "NOAA National Centers for Environmental Information", "@type": "org:Organization" } |
| rights | otherRestrictions, otherRestrictions |
| spatial | -151.61283,55.60306,-156.72228,58.55018 |
| temporal | 2015-03-15T00:37:49+00:00/2015-03-31T16:04:29+00:00 |
| title | Acoustic-Trawl Survey of Walleye Pollock in the Gulf of Alaska (DY1503, EK60) |
