Short Citation:
Alaska Fisheries Science Center, 2021: AFSC/RACE/MACE: Association between large cetaceans and their prey: East Kodiak,

Item Identification

Title: AFSC/RACE/MACE: Association between large cetaceans and their prey: East Kodiak
Short Name: Association between large cetaceans and their prey: East Kodiak
Status: In Work

Analysis of two different surveys of acoustic and biological data from the Albatross Bank region of the Gulf of Alaska off eastern Kodiak Island indicates that humpback whales (Megaptera novaeangliae) and fin whales (Balaenoptera physalus) can both be found in close association with their preferred prey items. Notably, humpback whales are most often found in association with highly concentrated patches of krill, and fin whales are found in association with schools of capelin.

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Mixed
Maintenance Frequency: As Needed
Data Presentation Form: Simrad RAW file format

Support Roles

Data Steward

CC ID: 269921
Date Effective From: 2015
Date Effective To:
Contact (Person): Towler, Rick
Email Address:


CC ID: 269922
Date Effective From: 2015
Date Effective To:
Contact (Person): Anderson, Charles
Address: 325 Broadway, E/GC3
Boulder, CO 33149
Email Address:
Phone: 303-497-4742

Metadata Contact

CC ID: 269923
Date Effective From: 2014-07-31
Date Effective To:
Contact (Person): MC, Metadata Coordinators
Email Address:

Point of Contact

CC ID: 269924
Date Effective From: 2014-07-31
Date Effective To:
Contact (Person): McCarthy, Abigail
Email Address:


Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 238967

Gulf of Alaska:

Extent Group 1 / Time Frame 1

CC ID: 239073
Time Frame Type: Range
Start: 2004-07
End: 2006-10

Access Information

Security Class: Unclassified
Data Access Procedure:

Go to or email Anderson, Charles (

Data Access Constraints:


Data Use Constraints:

User must read and fully comprehend the metadata prior to use. User must acknowledge the Originator when using the data set as a source. User must share data products developed using the source data set with the Originator. Data should not be used beyond the limits of the source scale.

Distribution Information

Distribution 1

CC ID: 269926
Download URL:

Data Quality

Quality Control Procedures Employed:

These data were collected in accordance NOAA protocols for fisheries acoustics surveys and related sampling (Alaska Fisheries Science Center), 23 p. Prepared by Midwater Assessment and Conservation Engineering Program, Alaska Fish. Sci. Center, Natl. Mar. Fish. Serv., NOAA. Available online:

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?: Yes
Approximate Delay Between Data Collection and Dissemination: 180
Actual or Planned Long-Term Data Archive Location: NCEI-CO
Approximate Delay Between Data Collection and Archiving: 180
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:

Acoustic data were collected with Simrad EK500 and ER60 quantitative echosounding systems (Simrad, 2001; Bodholt et al. 1989, Bodholt and Solli 1992) on the NOAA Ship Miller Freeman, a 66-m stern trawler equipped for fisheries and oceanographic research. Four split-beam transducers (18, 38, 120, and 200 kHz) were mounted on the bottom of the vessel's retractable centerboard, which extended 9 m below the water surface. System electronics were housed inside the vessel in a permanent laboratory space dedicated to acoustics. Acoustic data were collected at 38 kHz with the EK500 echosounder and at 18, 120, and 200 kHz with the ER60 echosounder. Acoustic data were logged using SonarData EchoLog 500 and ER60 software. Echo integration data were collected from 14 m (45.9 ft) below the surface to 0.5 m (1.6 ft) of the bottom and were analyzed using SonarData Echoview post-processing software (Version 3.10.129). Echo integration and target strength (TS) data were collected simultaneously for all sounder-transducer combinations. Results presented here are based on 38 kHz data.

Catalog Details

Catalog Item ID: 28308
Metadata Record Created By: Abigail McCarthy
Metadata Record Created: 2015-10-28 18:10+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-06-04 13:14+0000
Metadata Record Published: 2016-05-18
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2017-05-19