gov.noaa.nmfs.inport:27710 eng UTF8 dataset Alaska Fisheries Science Center 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA https://www.afsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 0700-1700 Pacific Time resourceProvider 2025-05-15T19:15:48 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) AFSC/ABL: Frederick Sound Echo-integrated Trawl Survey, 2001 to 2004 AFSC/ABL: Frederick Sound Echo-integrated Trawl Survey, 2001 to 2004 publication NOAA/NMFS/EDM 27710 https://www.fisheries.noaa.gov/inport/item/27710 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Vollenweider, Johanna joanna.volleweider@noaa.gov originator Csepp, Dave dave.csepp@noaa.gov originator The acoustic trawl database for Frederick Sounds echo-trawl survey was conducted from 2001 to 2004. The surveys were conducted throughout most of the southern part of Stephens Passage and Frederick Sound in southeast Alaska and all their adjoining bays. Acoustic and trawl surveys were conducted every 3 months to verify acoustic signals and to collect biological data. This study was conducted to study the relationship between Steller sea lions (Eumetopias jubatus) and their prey. Acoustic equipment were calibrated before every trawl survey. Trawls were used to identify the fish species associated with a specific acoustic signal and to get length weight data per species. Acoustic data were analyzed by the same qualified acoustician throughout the surveys duration with calibrations entered into the analytical software after each calibration. Trawl data were used to enumerate and identify all nekton found within the study area and to generate length frequencies, species composition and abundance by season. The acoustic data was use to generate biomass estimates for Pacific herring, Pacific hake and walleye pollock. Longlines were deployed to better identify and enumerate the benthic species not usually caught in pelagic trawls. This dataset contains the data from the echo-integrated trawl survey from 2001 to 2004. completed Csepp, Dave dave.csepp@noaa.gov pointOfContact Csepp, Dave dave.csepp@noaa.gov custodian notPlanned Pacific hake Pacific herring walleye pollock theme ITIS Alaska place Geographic Names Information System acoustics demersal echo integration trawl survey longline pelagic theme DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Auke Bay Laboratories project InPort otherRestrictions Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/ABL: Frederick Sound Echo-integrated Trawl Survey, 2001 to 2004 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/27710. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. otherRestrictions Use Constraints: User must read and fully comprehend the metadata prior to use. Data should not be used beyond the limits of the source scale. Acknowledgement of NOAA, as the source from which these data were obtained, in any publications and/or other representations of these data is suggested. otherRestrictions Distribution Liability: The user is responsible for the results of any application of this data for other than its intended purpose. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 27710 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/27710.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US biota Microsoft Excel Spreadsheet -134.5 -133.5 56 57.167 Alaska, Southeast Alaska, Stephens Passage, Frederick Sound | Currentness: Ground Condition 2001-06-01 2004-05-01 dataset Completeness Report None Conceptual Consistency Acoustic equipment were tested through monthly calibrations. Data were checked throughout its analysis quantitatively and qualitatively throughout their analytical processes. Echo integration-trawl surveys were conducted over 2700 km2 in Stephens Passage, Frederick Sound, and associated bays in southeastern Alaska every 3 months between June 2001 and May 2004. Longline surveys were conducted in the same area from September 2003 to May 2004. Standardized acoustic box surveys were run in Frederick sound and Stephens passage and zigzag transects in the bays. Trawls were run on all interesting sign, schools and layers to identify acoustic sign. A Simrad split beam 38 kHz system was used. Samples were taken from both fishing methods for age, length, weight and nutritional analysis.