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AFSC/NMML: Beluga whale aerial survey in Cook Inlet, Alaska, 1993-2022
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The National Marine Fisheries Service (NMFS) has conducted aerial counts of Cook Inlet
beluga whales (Delphinapterus leucas) from 1993 to 2012, 2014, 2016, 2018, 2021, and
2022. Nearly all counts were conducted during the month of June. The routine nature
of these counts and the consistency in research protocol lend themselves to inter-annual
trend analyses. Beginning in 2005, an aerial survey was added during the month of
August to document calving groups within the upper Inlet (north of East and West Foreland).
Research protocol has been based on paired observers on the shoreward side of the
aircraft and a single observer and computer operator on the offshore side independently
searching for marine mammals. Data on environmental conditions, time, location, species,
and inclinometer angle were collected for each sighting. The counting protocol included
multiple passes near each beluga group while simultaneously collecting video footage.
The counting system and observer performance has been tested through paired, independent
observational effort. Information about the Cook Inlet beluga whale projects conducted
at NOAA can be found here: https://www.fisheries.noaa.gov/species/beluga-whale#science.
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https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0133936 |
https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0133936 |
Cook Inlet beluga whale aerial survey data. |
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https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords |
GCMD Keyword Forum Page |
Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt,
MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard
Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA).
URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords |
information |
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https://repository.library.noaa.gov/view/noaa/22918 |
Aerial surveys, distribution, abundance, and trend of belugas (Delphinapterus leucas)
in Cook Inlet, Alaska, June 2018 |
The National Marine Fisheries Service (NMFS) has conducted aerial surveys to estimate
abundance of the beluga population in Cook Inlet, Alaska, each June, July, or both
from 1993 to 2012, after which biennial surveys began in 2014. The current document
presents survey results and subsequent analyses yielding an abundance estimate and
population trend based on data collected during June 2018. |
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https://repository.library.noaa.gov/view/noaa/45364 |
Distribution of belugas (Delphinapterus leucas) in Cook Inlet, Alaska, June 2021 and
June 2022 |
Online Resource |
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https://www.afsc.noaa.gov |
Website |
Website for this organization |
information |
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https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center |
Alaska Fisheries Science Center Website |
AKFSC Home Page |
information |
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https://www.fisheries.noaa.gov/inport/item/17335 |
Full Metadata Record |
View the complete metadata record on InPort for more information about this dataset. |
information |
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https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/17335.pdf |
NOAA Data Management Plan (DMP) |
NOAA Data Management Plan for this record on InPort. |
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https://www.ncei.noaa.gov/contact |
NCEI Contact Information |
Information for contacts at NCEI. |
information |