Slide Menu
Search Help Show/Hide Menu
Short Citation:
Alaska Fisheries Science Center, 2023: AFSC/ABL: 2012 Chum Salmon Bycatch Sample Analysis Bering Sea,

Item Identification

Title: AFSC/ABL: 2012 Chum Salmon Bycatch Sample Analysis Bering Sea
Short Name: AFSC/ABL: 2012 Chum Salmon Bycatch Sample Analysis Bering Sea
Status: Completed
Publication Date: 2013

A genetic analysis of samples from the chum salmon (Oncorhynchus keta) bycatch from the 2012 Bering Sea walleye pollock (Gadus chalcogrammus) trawl fishery was undertaken to determine the overall stock composition of the sample set. A genetic analysis of chum salmon collected during a test of a salmon excluder device was also conducted. Samples were genotyped for 11 microsatellite markers and results were estimated using the current chum salmon microsatellite baseline. In 2012, genetic samples were collected systematically as part of a special project that commenced in 2011 to reduce sample biases that exist in collections from previous years and have the potential to affect stock composition analysis results. One genetic sample was collected for every 31.5 chum salmon caught in the 98% of the midwater trawl fishery that was sampled. Evaluation of sampling based on time, location, and vessel indicated that the genetic samples were representative of the total bycatch. Based on the analysis of 673 chum salmon bycatch samples collected throughout the 2012 Bering Sea trawl fishery, the North Asian stocks dominated the sample set (39%), with moderate contributions from East Asian (20%), Eastern Gulf of Alaska (GOA)/Pacific Northwest (PNW) (18%), and Western Alaska (14%) stocks, and smaller contributions from Upper/Middle Yukon River (7%) and Southwest Alaska (2%) stocks. The estimates for the 2012 chum salmon bycatch sample set differed from the mean of the 20052011 estimates for the two Asian regions, but not for the North American regions. The pattern of changes of regional stock contributions over three time periods in 2012 differed from previous years for some regions. There were some spatial differences in stock distribution; e.g., the East Asian stock contribution was higher in the central Bering Sea than in the southeastern Bering Sea. As with the bycatch samples, the salmon excluder device test samples included fish from all geographic regions despite being collected at small spatial and temporal scales.


This dataset contains the data from genetic analyses of fish captured in 2011 in the Bering Sea.


Loaded by FGDC Metadata Uploader, batch 6000, 05-01-2015 20:36

The following FGDC sections are not currently supported in InPort, but were preserved and will be included in the FGDC export:

- Taxonomy (FGDC:taxonomy)


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
ITIS chum salmon
ITIS Oncorhynchus keta
None bycatch
None genetic stock identification

Spatial Keywords

Thesaurus Keyword
Geographic Names Information System Alaska
Geographic Names Information System Bering Sea

Physical Location

Organization: Auke Bay Laboratories
City: Juneau
State/Province: AK
Country: US

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: maps and data
Distribution Liability:

The user is responsible for the results of any application of this data for other than its intended purpose.

Data Set Credit: National Marine Fisheries Services Observer Program

Support Roles

Data Steward

CC ID: 201276
Date Effective From: 2015-05-01
Date Effective To:
Contact (Person): Kondzela, Chris
Email Address:


CC ID: 201275
Date Effective From: 2015-05-01
Date Effective To:
Contact (Person): Kondzela, Chris
Email Address:

Metadata Contact

CC ID: 201273
Date Effective From: 2015-05-01
Date Effective To:
Contact (Person): MC, Metadata Coordinators
Email Address:


CC ID: 201277
Date Effective From: 2015-05-01
Date Effective To:
Contact (Person): Kondzela, Chris
Email Address:

Point of Contact

CC ID: 201274
Date Effective From: 2015-05-01
Date Effective To:
Contact (Person): Kondzela, Chris
Email Address:


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 201272
W° Bound: -178.61
E° Bound: -164.07
N° Bound: 60.97
S° Bound: 54.11

Alaska, Bering Sea

Extent Group 1 / Time Frame 1

CC ID: 201271
Time Frame Type: Range
Start: 2012-06-11
End: 2012-11-01

Access Information

Security Class: Unclassified
Data Access Procedure:


Data 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.

Data 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 Information

Distribution 1

CC ID: 233732
Download URL:

NCEI to be determined

Technical Environment


Microsoft Excel Spreadsheet

Data Quality

Completeness Report:


Conceptual Consistency:

Genotypes were scored by two people with the software GeneMapper 4.0. Samples missing genotypes from four or more loci, or having six or more homozygous loci were removed.

Quality Control Procedures Employed:

Contact the dataset POC for full QA/QC methodology

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: Yes
Is Access to the Data Limited Based on an Approved Waiver?: Yes
If Distributor (Data Hosting Service) is Needed, Please Indicate: yes
Approximate Delay Between Data Collection and Dissemination: unknown
If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed:

no delay

Actual or Planned Long-Term Data Archive Location: To Be Determined
If To Be Determined, Unable to Archive, or No Archiving Intended, Explain:

NCEI stie yet to be determined

Approximate Delay Between Data Collection and Archiving: unknown
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

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.


Process Steps

Process Step 1

CC ID: 201281

All allele designations were standardized to the 381-population baseline dataset from Fisheries and Oceans Canada (DFO), available at

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity 2012 Chum Bycatch

Catalog Details

Catalog Item ID: 24868
GUID: gov.noaa.nmfs.inport:24868
Metadata Record Created By: Emily A Fergusson
Metadata Record Created: 2015-05-01 20:35+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:10+0000
Metadata Record Published: 2016-05-04
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2016-05-04
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2017-05-04