27709 AFSC/ABL: Lynn Canal Echo-Integrated Trawl Surveys, 2001-2004 Data Set Published / External 12324 Auke Bay Laboratories Project Completed Unknown The acoustic trawl database for Lynn Canals echo-trawl survey was conducted from 2001 to 2004 throughout southern Lynn Canal in southeast Alaska. Acoustic surveys were conducted one day per month and trawl surveys were conducted every 3 months to verify acoustic signals and collect biological data. This study was conducted to study the relationship between Steller sea lions (Eumetopias jubatus) and their prey. Additional acoustic surveys were conducted throughout the winter of 2004 to 2005 on 6 consecutive days once a month in order to study forage fish hots spots. Acoustic equipment were calibrated before every trawl survey. Acoustic data were analyzed by the same qualified acoustician throughout the surveys duration with calibrations entered into the analytical software after each calibration. Trawls were used to identify the fish species associated with a specific acoustic signal and to get length weight data per species. Trawl data were also used to enumerate and identify all nekton found within the study area and to generate length frequencies, species composition and abundance by species and season. The acoustic data was use to generate biomass estimates for Pacific herring 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 surveys from 2001 to 2004. Loaded by FGDC Metadata Uploader, batch 7179, 10-05-2015 18:35 Theme ISO 19115 Topic Category biota Theme ITIS herring Theme ITIS walleye pollock Theme ecology Theme forage fish Theme seasonality Spatial Geographic Names Information System Alaska Auke Bay Laboratories Juneau AK US Data Set None Planned Image (digital) The user is responsible for the results of any application of this data for other than its intended purpose. unknown unknown unknown Data Steward 2015-10-01 Person Csepp, Dave dave.csepp@noaa.gov Distributor 2015-10-01 Person Csepp, Dave dave.csepp@noaa.gov Originator 2015-10-05 Person Csepp, Dave dave.csepp@noaa.gov Point of Contact 2015-10-02 Person Csepp, Dave dave.csepp@noaa.gov Ground Condition -135.4189 -134.7697 58.5819 58.4156 Alaska, Southeast Alaska, Lynn Canal, Favorite Channel Range 2001-06 2004-05 Unclassified N/A There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. 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. https://www.ncei.noaa.gov/ NCEI to be determined Microsoft Excel Spreadsheet None Tests were regularly done on acoustic gear as cited in publication with calibrations and constant noise and signal evaluation throughout all surveys. Data was regularly checked during data entry, while making spreadsheets, master sheets, sorting, analyzing data and making plots and tables. When everything was done we rechecked everything for consistency, completeness and accuracy. Contact the dataset POC for full QA/QC methodology Yes Unknown Yes Yes yes unknown no delay To Be Determined unknown IT Security and Contingency Plan for the system establishes procedures and applies to the functions, operations, and resources necessary to recover and restore data as hosted in the Western Regional Support Center in Seattle, Washington, following a disruption. 1 See publications for methodology gov.noaa.nmfs.inport:27709 Emily Fergusson 2015-10-05T18:34:02 SysAdmin InPortAdmin 2025-05-15T19:15:48 2016-05-18 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 No 2016-05-18 1 Year 2017-05-18