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Alaska Fisheries Science Center, 2022: AFSC FIT Pacific cod tagging data from the Bering Sea, 2002-2006,

Item Identification

Title: AFSC FIT Pacific cod tagging data from the Bering Sea, 2002-2006
Short Name: AFSC FIT Pacific cod tagging data from the Bering Sea, 2002-2006
Status: Completed

Data from opportunistic tagging studies in the southest Bering Sea 2002-2003. Individually numbered loop spaghetti tags released during research cruises; all recoveries from fishing industry. Main release groups in February 2003 at two locations: 1) N of Cape Sarichef, Unimak Island, and 2) off Amak Island, north of the Alaska peninsula. Other smaller releases at several locations in southeat Bering Sea from April 2002 to November 2003. Pacific cod (Gadus macrocephalus) caught with commercial and research pot gear from depths of 50-150 meters; length of tagged fish primarily 50-80 cm. Data in MS Access format (digital tabular). Data include lat/long of capture and release locations, release date/time, fish length and condition at release. Recovery data includes location and date of recovery, recovering vessel and gear, fishery observer, recipient for tag reward. Most recovery locations in lat/lon to nearest minute, some to state or federal stat area only; variables code quality of recovery location and date info. Most records include length, weight, sex, and condition of recovered fish, some otoliths collected. Recoveries primarily documented by fishery observers on vessel or at delivery plant. Database includes tags recovered through Dec 2007. Total of 6871 tags released, 2634 tags recovered. Important caveats: 1) tags released opportunistically, not in design or associated with quantitative model, 2) most tage releases were in main commercial fishing ground during fishing season, assumptions of mixing with overall population are invalid, 3) all recoveries through industry, spatial and temporal distribution of recovery effort very non-uniform, some areas little or no effort. Raw data including coordinates of tag recoveries and vessel information are considered observer data and are confidential under the Magnuson-Stevens Act.


Pilot/feasibility study for spaghetti tagging of Pacific cod in Alaskan waters. Qualitative evaluation of cod movement patterns near large spawning ground. Local movement of cod in area of localized depletion study off Cape Sarichef, Unimak Island.


Loaded by FGDC Metadata Uploader, batch 7850, 12-14-2015 17:01

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

- Taxonomy (FGDC:taxonomy)

- Spatial Reference Information (FGDC:spref),

- Spatial Data Organization Information (FGDC:spdoinfo)

Supplemental Information:

Publicaiton of tagging studies in preparation (2009)

Study area and tagging methods described in Conners, M.E, P. Munro, S. Neidetcher. 2004. Pacific cod pot studies 2002-2003. AFSC Processed Report 2004-04.

Tagging conducted in conjunction with Pacific cod localized depletion study off Cape Sarichef, described in: Conners, M.E. and P. Munro. 2008. Effects of commercial fishing on local abundance of Pacific cod (Gadus macrocephalus) in the Bering Sea. Fisheries Bulletin 106:281-292.


Theme Keywords

Thesaurus Keyword
ISO19115 Biota
ISO19115 Oceans
None tagging

Spatial Keywords

Thesaurus Keyword
None Alaska continental shelf
None Amak Island
None Bering Sea
None Pribilof Islands
None southeast Bering Sea
None Unimak Island
None Unimak Pass
None western Gulf of Alaska

Physical Location

Organization: Alaska Fisheries Science Center
City: Seattle
State/Province: WA
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: Table (digital)
Entity Attribute Overview:

Table TagRelease inlcudes position,date, and info on fish at tag release. Table Recovery includes info collected when tag was recovered. Each has a unique key. The two tables are linked by the primary tag number, the serial number of the tag (or, if two tags were placed on a fish, the serial number of the first tag). Subsidiary tables contain information on the cruise and pot launch where fish were collected and codes for variables. All variables documented in Access database; contact authors for details.

Data Set Credit: Most of the releases were performed from cruises funded by NMFS (Steller Sea Lion Research), and recovery information processing and rewards were also funded by NMFS (staff salaries). Data analysis was funded by NPRB.

Support Roles

Data Steward

CC ID: 263879
Date Effective From: 2015
Date Effective To:
Contact (Person): Conners, Liz
Email Address:

Metadata Contact

CC ID: 263768
Date Effective From: 2015-12-14
Date Effective To:
Contact (Person): MC, Metadata Coordinators
Email Address:


CC ID: 263770
Date Effective From: 2015-12-14
Date Effective To:
Contact (Organization): Alaska Fisheries Science Center (AFSC)
Address: 7600 Sand Point Way N.E., Building 4
Seattle, WA 98115
Business Hours: 0700-1700 Pacific Time

Point of Contact

CC ID: 263769
Date Effective From: 2015-12-14
Date Effective To:
Contact (Person): Conners, Liz
Email Address:


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 263767
W° Bound: 179.999999
E° Bound: -154
N° Bound: 62
S° Bound: 53

Main releases in known spawning ground just north of Alaska Peninsula from Amak Island to Unimak Island. Some releases south of Unimak Island and west of Unimak Pass. Recoveries throughout Bering Sea, including areas north of St Matthew Is. One recovery in Aleutian Islands and a few in western GOA. Most recoveries and recovery effort in southeast BS from Unimak Island to Pribilofs

Extent Group 1 / Time Frame 1

CC ID: 263766
Time Frame Type: Range
Start: 2002
End: 2007

Access Information

Security Class: Sensitive
Data Access Procedure:


Data Access Constraints:

Recovery positions and vessel information are confidential under the Magnuson-Stevens Act (observer data). Access to raw data only for persons registered under federal and AFSC data confidentiality agreements. Summarized data may be relased, check with AFSC for summary requirements.

Data Use Constraints:

Data analysis and publication by original authors is ongoing. Must cite originator if used in publications, reports, presentations, etc.

Technical Environment



Data Quality


Location of recoveries strongly affected by spatial and temporal pattern of commercial fishery effort - strongly non-random and non-uniform.

Recovery location generally lat/long to degrees/minutes at end of commercial tow. Some records location to state or federal stat area only; some lat/longs estimated as centroid of stat area. Tags recovered in deliveries to processing plants may have estimated dates over range of vessel trip (usually 3-days). All recovery data reviewed for data entry accuracy and recovery locations checked. Variables in database classify quality of recovery location and date data.

Opportunistic release locations selected to qualitatively assess movement in area northeast of Unimak Pass, not uniform or desigend pattern over space/time. Lat/lon of release locations collected by research vessel navigation GPS/software.

Size of fish tagged restricted by size selectivity of pot gear. Most fish tagged 50-80 cm fork length (3-5 yrs old). No juvenile fish tagged. Sex of tagged fish determined at recovery in most cases.

Species id of tagged fish confirmed by AFSC scientists during tagging. Release length recorded to nearest cm. Accuracy of recovery data dependent on observer training/experience.

Fish with obvious injuries or barotrauma culled before tagging. Some initial tag mortality studies, but no quantiative tag mortality rate estimates. No tag loss or tag recovery rate estimates.

Completeness Report:

Tag number -999 indicate tags that were returned but where the tag was damaged and the serial number unreadable. For some tags the number was partially obscured, where tag number was partially inferrred from fish data is indicated in comment field. Missing values occur in all data fields except primary tag type and number.

Conceptual Consistency:

All data subjected to QA/QC review. Release data files reviewed in Excel format after field cruise. Recovery data entry proofed for accuracy. GIS used to plot release and recovery locations for reasonableness (e.g., not on land)

Database scanned for impossible values (recovery length less than release length, recovery date earlier than release date); anomalies flagged but not removed.

Quality Control Procedures Employed:

See dataqual and method in uploaded FGDC view.

Data Management

Have Resources for Management of these Data Been Identified?: No
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: No
Is Access to the Data Limited Based on an Approved Waiver?: Yes
If Distributor (Data Hosting Service) is Needed, Please Indicate: na
Approximate Delay Between Data Collection and Dissemination: na
If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed:


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

Archival site needed for confidential data.

Approximate Delay Between Data Collection and Archiving: na
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.


Lineage Statement:

See dataqual and method in uploaded FGDC view.

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity tblRecovery
Entity tblTagRelease

Catalog Details

Catalog Item ID: 26255
GUID: gov.noaa.nmfs.inport:26255
Metadata Record Created By: Angie Greig
Metadata Record Created: 2015-08-03 11:43+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2016-05-05
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2016-05-05
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2017-05-05