Small cetacean aerial survey conducted in Alaskan waters by Alaska Fisheries Science Center, National Marine Mammal Laboratory from 1997-05-08 to 1999-07-04 (NCEI Accession 0131991)

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.

Data and Resources

Field Value
access_constraints ["Cite as: Hobbs, Rod; Waite, Janice (2015). Small cetacean aerial survey conducted in Alaskan waters by Alaska Fisheries Science Center, National Marine Mammal Laboratory from 1997-05-08 to 1999-07-04 (NCEI Accession 0131991). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0131991. Accessed [date].", "Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose."]
bbox-east-long -130.8902
bbox-north-lat 61.154
bbox-south-lat 53.7782
bbox-west-long -165.0623
contact-email ncei.info@noaa.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2015-10-06"}]
frequency-of-update asNeeded
graphic-preview-description Preview graphic
graphic-preview-file https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0131991
graphic-preview-type PNG
guid gov.noaa.nodc:0131991
licence ["accessLevel: Public"]
metadata-date 2020-06-15T06:07:26Z
metadata-language eng
metadata_type geospatial
old-spatial {"type": "Polygon", "coordinates": [[[-165.0623, 53.7782], [-130.8902, 53.7782], [-130.8902, 61.154], [-165.0623, 61.154], [-165.0623, 53.7782]]]}
progress completed
resource-type dataset
responsible-party [{"name": "", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-165.0623, 53.7782], [-130.8902, 53.7782], [-130.8902, 61.154], [-165.0623, 61.154], [-165.0623, 53.7782]]]}
spatial_harvester true
temporal-extent-begin 1997-05-08
temporal-extent-end 1999-07-04
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • abundance
  • alaska
  • amerigeo
  • amerigeoss
  • ckan
  • distribution
  • geo
  • geoss
  • national
  • north-america
  • oceanography
  • summer
  • united-states
isopen False
metadata_created 2025-11-22T23:28:38.459608
metadata_modified 2025-11-22T23:28:38.459612
notes 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.
num_resources 14
num_tags 13
title Small cetacean aerial survey conducted in Alaskan waters by Alaska Fisheries Science Center, National Marine Mammal Laboratory from 1997-05-08 to 1999-07-04 (NCEI Accession 0131991)