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AFSC/ABL: 2007 Chum Salmon Bycatch Sample Analysis Bering Sea

Metadata Updated: April 1, 2024

A genetic analysis of samples from the chum salmon (Oncorhynchus keta) bycatch of the 2007 Bering Sea walleye pollock (Theragra chalcogramma) trawl fishery was undertaken to determine the overall stock composition of the sample set. Samples were genotyped for eleven microsatellite markers and results were estimated using the current chum salmon microsatellite baseline. In 2007, genetic samples were collected opportunistically as part of a special project, but sample biases have the potential to affect stock composition analysis results. Consequently, stock composition estimates apply to the sample set and may not represent the entire chum salmon bycatch. Based on the analysis of 1,279 chum salmon bycatch samples collected throughout the 2007 Bering Sea trawl fishery, North Asian (35%), East Asian (34%), and Eastern Gulf of Alaska/Pacific Northwest (16%) stocks dominated the sample set, with smaller contributions from Western Alaska (10%) and Upper/Middle Yukon River (5%) stocks. The estimates for the 2007 chum salmon bycatch sample set were similar to the 2005, 2006, and 2009 chum salmon bycatch estimates, suggesting consistency of the regional stock contributions across years. Analysis of temporal groupings within the groundfish B season revealed changes in stock composition during the course of the season with decreasing contribution of Upper/Middle Yukon stocks over time, but leaves unanswered whether these changes are due to temporal or spatial differences in the sample set.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date February 29, 2024
Metadata Created Date October 28, 2022
Metadata Updated Date April 1, 2024
Reference Date(s) 2011 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NMFS AFSC

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date October 28, 2022
Metadata Updated Date April 1, 2024
Reference Date(s) 2011 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:24858
Access Constraints Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/ABL: 2007 Chum Salmon Bycatch Sample Analysis Bering Sea [Data Date Range], https://www.fisheries.noaa.gov/inport/item/24858., Access Constraints: For scientific, management, and regulation compliance purposes, all data collected by observers are confidential under the Magnuson-Stevens Fishery Conservation and Management Act [bm1]; as amended, Public Law 109-479; 16 U.S.C. 1953; implemented at 50 CFR 679.50. Therefore unprocessed (raw) data can be shared only with authorized persons; however aggregated forms of the data are generally available., 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. The user must adhere to restrictions placed on publication of data by the Magnuson-Stevens Fishery Conservation and Management Act. The user is responsible for the results of any application of this data for other than its intended purpose., Distribution Liability: The user is responsible for the results of any application of this data for other than its intended purpose.
Bbox East Long -162.62
Bbox North Lat 61.35
Bbox South Lat 51.25
Bbox West Long -179.36
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id 93a9739e-e930-4b42-a2d8-124a5356cb20
Harvest Source Id 26a29bb9-50b0-47fd-920b-edc74aa6ec76
Harvest Source Title NMFS AFSC
Licence 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.
Lineage
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-179.36, 51.25], [-162.62, 51.25], [-162.62, 61.35], [-179.36, 61.35], [-179.36, 51.25]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2007-02-10
Temporal Extent End 2007-10-29

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