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Alaska Fisheries Science Center Metadata Librar... > National Marine Mammal Laboratory > Cetacean Assessment and Ecology Program >

AFSC/NMML: Small cetacean aerial survey in Alaskan waters, 1997-1999

Data Set (DS)  |  Alaska Fisheries Science Center (AFSC)
GUID: gov.noaa.nmfs.inport:26315  |  Updated: March 4, 2026  |  Published / External 
Short Citation:
Full Citation Examples
Alaska Fisheries Science Center, 2026: AFSC/NMML: Small cetacean aerial survey in Alaskan waters, 1997-1999, https://www.fisheries.noaa.gov/inport/item/26315.

Item Identification

Title: AFSC/NMML: Small cetacean aerial survey in Alaskan waters, 1997-1999
Short Name: AFSC/NMML: Small cetacean aerial survey in Alaskan waters, 1997-1999
Status: Completed
Creation Date: 1997
Abstract:

Aerial surveys were conducted to produce abundance estimates for the three Alaska stocks of harbor porpoise. Surveys occurred from May to July 1997 for the Southeast Alaska stock, May to July 1998 for the Gulf of Alaska stock, and June to July 1999 for the Bering Sea stock. Two primary observers observed from bubble windows on the left and right side of the plane. A belly window observer with a view directly down along the trackline collected sightings that were matched to the side observers and used to estimate a correction factor for perception bias that was specific to harbor porpoise in Alaskan waters.
Purpose:

The primary objective was to collect line-transect data for abundance estimation, density, and distribution for the three stocks of harbor porpoise in Alaska waters and develop a correction factor for perception bias. The data was also used to estimate abundance, density, and distribution for Dall's porpoise throughout the study region.
Notes:

Loaded by FGDC Metadata Uploader, batch 6773, 08-10-2015 15:48

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

- Taxonomy (FGDC:taxonomy)

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
biota
ISO 19115 Topic Category
oceans
UNCONTROLLED
None abundance
None distribution

Temporal Keywords

Thesaurus Keyword
UNCONTROLLED
None summer

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None Alaska

Physical Location

Organization: National Marine Mammal Laboratory
City: Seattle
State/Province: WA
Country: United States

Data Set Information

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

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

NOAA denies liability if the data are misused.

Support Roles

Data Steward

CC ID: 227430
Date Effective From: 1997
Date Effective To:
Contact (Person): Waite, Janice
Address: 7600 Sand Point Way, NE
Seattle, WA 98115-6349
Email Address: janice.waite@noaa.gov
Phone: 206-526-6554

Distributor

CC ID: 227429
Date Effective From: 1997
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: 212374
Date Effective From: 2015-08-10
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: 212373
Date Effective From: 2015-08-10
Date Effective To:
Contact (Person): Clapham, Phillip
Address:
Email Address: phillip.clapham@noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 212371
W° Bound: -165
E° Bound: -130
N° Bound: 62
S° Bound: 54
Description

Alaskan waters from Dixon Entrance to Bristol Bay

Extent Group 1 / Time Frame 1

CC ID: 212370
Time Frame Type: Range
Start: 1997
End: 1999

Access Information

Security Class: Unclassified
Data Access Procedure:

The data is available at http://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0131991
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: 239514
Download URL: https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0131991
Distributor: NOAA National Centers for Environmental Information (NCEI) (1997 - Present)
Description:

cvs file with effort and sighting data
File Type (Deprecated): csv (comma-separated values)
Distribution Format: CSV - Comma Separated Values (Text)

URLs

URL 1

CC ID: 212410
URL: https://fishbull.noaa.gov/1083/hobbs.pdf
URL Type:
Online Resource
Description:

Hobbs and Waite. 2010. Abundance of harbor porpoise (Phocoena phocoena) in three Alaskan regions, corrected for observer errors due to perception bias and species misidentification, and corrected for animals submerged from view. Fisheries Bulletin 108:251-267.

Technical Environment

Description:

Excel

Data Quality

Completeness Report:

All marine mammal species were recorded. Gaps in the survey occurred due to bad weather, particularly in the Gulf of Alaska south of Prince William Sound and south of the west end of the Alaska Peninsula. The data include possible doublecounts between observers. The belly window observer was an independent observer and matches between belly window and side window sightings were used to produce a correction factor for perception bias.
Quality Control Procedures Employed:

Data was edited each night after collection. Effort lines and sightings were plotted in ArcGis to assure accuracy of positional data.

Data Management

Have Resources for Management of these Data Been Identified?: No
Approximate Percentage of Budget for these Data Devoted to Data Management: 0
Do these Data Comply with the Data Access Directive?: Yes
Is Access to the Data Limited Based on an Approved Waiver?: No
Approximate Delay Between Data Collection and Dissemination: Unknown
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: 212378
Description:

NA

Child Items

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Rubric Score Type Title
Entity csv file

Catalog Details

Catalog Item ID: 26315
GUID: gov.noaa.nmfs.inport:26315
Metadata Record Created By: Janice Waite
Metadata Record Created: 2015-08-10 15:47+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2026-03-04 19:17+0000
Metadata Record Published: 2018-11-27
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-11-27
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-11-27