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AFSC/REFM: Isolation by distance (IBD) Alaskan fish stock structure modeling

Data Set (DS)  |  Alaska Fisheries Science Center (AFSC)
GUID: gov.noaa.nmfs.inport:25327  |  Updated: March 4, 2026  |  Published / External 
Short Citation:
Full Citation Examples
Alaska Fisheries Science Center, 2026: AFSC/REFM: Isolation by distance (IBD) Alaskan fish stock structure modeling, https://www.fisheries.noaa.gov/inport/item/25327.

Item Identification

Title: AFSC/REFM: Isolation by distance (IBD) Alaskan fish stock structure modeling
Short Name: AFSC/REFM: Isolation by distance (IBD) Alaskan fish stock structure modeling
Status: Completed
Publication Date: 2015-08
Abstract:

There is no established management protocol for stocks subject to isolation-by-distance (IBD) stock structure. This study examines several management strategies for two marine fish species subject to IBD using simulation, Pacific cod in the Aleutian Islands (AI) and northern rockfish in the Eastern Bering Sea (EBS) and Aleutian Islands. A one-dimensional stepping stone model was used to model isolation by distance, and was intended to mimic regions where marine species are exploited along a continental shelf. The performance of spatial assessment and management methods depended on how the range was split. Splitting anywhere within the managed area led to fewer demes falling below target and threshold biomass levels and higher yield than managing the entire area as a single unit. Equilibrium yield was maximized when each deme was assessed and managed separately and under catch cascading, in which harvest quotas within a management unit are spatially allocated based upon the distribution of survey biomass. The longer-lived rockfish declined more slowly than Pacific cod, and experienced greater depletion in biomass under disproportionate fishing effort due to lower productivity. Overall, splitting a management area of the size simulated in the model improved performance measures, and the optimal management strategy grouped management units by demes with similar relative fishing effort.
Purpose:

To examine how best to manage stocks subject to genetic isolation-by-distance stock structure.
Notes:

Loaded by FGDC Metadata Uploader, batch 6894, 08-24-2015 12:52

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

- Taxonomy (FGDC:taxonomy)
Other Citation Details:

Spies, I., Spencer, P. D., & Punt, A. E. (2015). Where do we draw the line? A simulation approach for evaluating management of marine fish stocks with isolation-by-distance stock structure. Canadian journal of fisheries and aquatic sciences, 72(7), 968-982.

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
biota
ISO 19115 Topic Category
oceans
UNCONTROLLED
None fisheries management
None Gadus macrocephalus
None genetics
None groundfish
None Isolation by distance stock structure
None northern rockfish
None Pacific cod
None Sebastes polyspinis
None spatial management

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None Aleutian Islands
None Bering Sea

Physical Location

Organization: National Centers for Environmental Information - Silver Spring, Maryland
City: Silver Spring
State/Province: MD

Data Set Information

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

Support Roles

Data Steward

CC ID: 234188
Date Effective From: 2015-10-19
Date Effective To:
Contact (Person): Spies, Ingrid
Address:
Email Address: ingrid.spies@noaa.gov

Distributor

CC ID: 247522
Date Effective From: 2015
Date Effective To:
Contact (Organization): NOAA National Centers for Environmental Information (NCEI)
Address:
ROR: https://ror.org/04r0wrp59
Email Address: ncei.info@noaa.gov
URL: NCEI Contact Information

Originator

CC ID: 213934
Date Effective From: 2015-08-24
Date Effective To:
Contact (Person): Spies, Ingrid
Address:
Email Address: ingrid.spies@noaa.gov

Originator

CC ID: 213935
Date Effective From: 2015-08-24
Date Effective To:
Contact (Organization): Alaska Fisheries Science Center (AFSC)
Address: 7600 Sand Point Way N.E., Building 4
Seattle, WA 98115
USA
ROR: https://ror.org/01h7fye62
Email Address: afsc.webmaster@noaa.gov
Phone: (206) 526-4000
Fax: (206) 526-4004
URL: https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center
Business Hours: 0700-1700 Pacific Time

Point of Contact

CC ID: 213933
Date Effective From: 2015-08-24
Date Effective To:
Contact (Person): Spies, Ingrid
Address:
Email Address: ingrid.spies@noaa.gov

Extents

Currentness Reference: publication

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 213931
W° Bound: 170
E° Bound: -160
N° Bound: 62
S° Bound: 50
Description

Bering Sea and Aleutian Islands

Extent Group 1 / Time Frame 1

CC ID: 213930
Time Frame Type: Discrete
Start: 2015

Access Information

Security Class: Unclassified
Data Access Procedure:

na
Data Access Constraints:

There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed.
Data Use Constraints:

User must read and fully comprehend the metadata prior to use. Applications or inferences derived from the data should be carefully considered for accuracy. Acknowledgement

of NOAA/NMFS/AFSC, 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: 234189
Download URL: https://accession.nodc.noaa.gov/0130929
Distributor:

URLs

URL 1

CC ID: 213937
URL: https://accession.nodc.noaa.gov/0130929/data/0-data/Spies_metadata_file_descriptions.rtf
Name: Metadata descriptions
URL Type:
Online Resource
Description:

Download link (6kb)

Technical Environment

Description:

R data

Data Quality

Completeness Report:

The simulation is based on data from 1991-2012 for Pacific cod and 1980-2012 for northern rockfish.
Conceptual Consistency:

Not applicable.
Quality Control Procedures Employed:

See FGDC methods.

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?: Yes
Is Access to the Data Limited Based on an Approved Waiver?: No
If Distributor (Data Hosting Service) is Needed, Please Indicate: no
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:

na
Actual or Planned Long-Term Data Archive Location: NCEI-MD
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

Process Steps

Process Step 1

CC ID: 213940
Description:

See FGDC methods.

Child Items

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Entity data files

Catalog Details

Catalog Item ID: 25327
GUID: gov.noaa.nmfs.inport:25327
Metadata Record Created By: Angie Greig
Metadata Record Created: 2015-06-11 11:38+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2026-03-04 19:17+0000
Metadata Record Published: 2016-04-28
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2016-04-28
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2017-04-28