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Short Citation:
Alaska Fisheries Science Center, 2023: AFSC/ABL: Karluk sockeye salmon scale time series,

Item Identification

Title: AFSC/ABL: Karluk sockeye salmon scale time series
Short Name: AFSC/ABL: Karluk sockeye salmon scale time series
Status: Completed
Publication Date: Unknown

To better understand how density-dependent growth of ocean-dwelling Pacific salmon varied with climate and population dynamics, we examined the marine growth of sockeye salmon in relation to an index of sockeye salmon abundances among climate regimes, population abundances, and body sizes under varied life history stages, from 1925 to 1998 using ordinary least squares and multivariate adaptive regression spline threshold models. The annual marine growth and body size during the juvenile, immature, and maturing life stages were estimated from increments on the scales of adult age 2.2 sockeye salmon that returned to spawn at Karluk River and Lake on Kodiak Island, Alaska. Intra-specific density-dependent growth was inferred from inverse relationships between growth and sockeye salmon abundance based on commercial harvest. Density-dependent growth occurred in all marine life stages, during the cool regime, at lower abundance levels, and at smaller body sizes at the start of the juvenile life stage. The finding that density-dependence occurred during the cool regime and at low population abundances suggests that a shift to a cool regime or extreme warm regime at higher population abundances could further reduce the marine growth of salmon and increase competition for resources.

Alaska salmon production fluctuates with climate and ocean conditions in the North Pacific Ocean. In this study, we evaluated the hypothesis that faster marine growth was related to higher survival as a consequence of more favorable ocean conditions for growth during the 1927-46 and 1977-2000 warm regimes, and slower growth was related to lower survival as a consequence of less favorable climatic and oceanic conditions for growth during the 1947-76 cool regime. We measured and compared the annual growth on scales collected from age 2.2 sockeye salmon that returned to Karluk Lake on Kodiak Island, Alaska from 1927 to 2000 to regime periods, climatic and oceanic indices, and survival. First and second marine-year scale growth fluctuated with the cool regime and recent warm regime. Survival estimated as the ratio of offspring to parental escapement was lower during the 1925-46 warm regime and 1947-76 cool regime. Survival was positively related to first and second marine year scale growth, eastern North Pacific atmospheric circulation, and reduced winter and spring coastal downwelling in the Gulf of Alaska. Winter and spring climatic and oceanic conditions influences on first and second year marine growth of Karluk Lake sockeye are a possible mechanisms linking Karluk Lake sockeye salmon survival to climate over the past half century.


This database contains the mean annual marine and total freshwater scale measurements for the age 2.2 sockeye.


Loaded by batch 3865, 12-18-2012 17:59


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
ITIS Oncorhynchus nerka
ITIS Sockeye salmon
None growth
None scale

Spatial Keywords

Thesaurus Keyword
GNIS - Geographic Names Information System Alaska
GNIS - Geographic Names Information System Karluk Lake
GNIS - Geographic Names Information System Kodiak Island
None AK

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: MS Excel Spreadsheet
Maintenance Frequency: As Needed
Data Presentation Form: Document (digital)

Support Roles

Data Steward

CC ID: 233711
Date Effective From: 2015-10-17
Date Effective To:
Contact (Person): Yasumiishi, Ellen
Email Address:


CC ID: 81658
Date Effective From: 2012-12-18
Date Effective To:
Contact (Person): Yasumiishi, Ellen
Email Address:

Metadata Contact

CC ID: 81660
Date Effective From: 2012-12-18
Date Effective To:
Contact (Person): MC, Metadata Coordinators
Email Address:


CC ID: 233712
Date Effective From: 2015-10-17
Date Effective To:
Contact (Person): Yasumiishi, Ellen
Email Address:

Point of Contact

CC ID: 81657
Date Effective From: 2012-12-18
Date Effective To:
Contact (Person): Yasumiishi, Ellen
Email Address:


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 81656
W° Bound: -154.04083
E° Bound: -154.46222
N° Bound: 57.57167
S° Bound: 57.3655

Karluk Lake and River system on Kodiak Island, Alaska

Extent Group 1 / Time Frame 1

CC ID: 81655
Time Frame Type: Range
Start: 1925
End: 2000

Access Information

Security Class: Unclassified
Data Access Procedure:


Data Access Constraints:

Contact the Point of Contact for data request form. The Data set is still being analyzed and will not be available for distribution until it has been finalized and all QA/QC practices have been performed. Contact the Data Point of Contact for estimated time of release.

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.

Distribution Information

Distribution 1

CC ID: 233713
Download URL:

NCEI to be determined

Technical Environment


Microsoft Excel 2003 Spreadsheets

Data Quality

Completeness Report:

Data were visually examined for outliers after measurement.

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 site 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.


Lineage Statement:

Contact the dataset POC for full methodology

Catalog Details

Catalog Item ID: 17247
GUID: gov.noaa.nmfs.inport:17247
Metadata Record Created By: Doug Turnbull
Metadata Record Created: 2012-12-18 17:59+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:10+0000
Metadata Record Published: 2016-05-18
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2016-05-18
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2017-05-18