Recent trends in the abundance of seasonal gray whales (Eschrichtius robustus) in the Pacific Northwest, 1996-2020

Harris, J.; Calambokidis, J.; Perez, A.; Mahoney, P. J.

doi:10.25923/npvh-p785

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Recent trends in the abundance of seasonal gray whales (Eschrichtius robustus) in the Pacific Northwest, 1996-2020

2022
By Harris, J. ; Calambokidis, J. ; Perez, A. ; ...
Series: AFSC processed report ; 2022-05

[PDF-1.00 MB]

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Personal Author:

Harris, J. ; Calambokidis, J. ; Perez, A. ; Mahoney, P. J.

Harris, J. ; Calambokidis, J. ; Perez, A. ; Mahoney, P. J. Less -
Corporate Authors:

Alaska Fisheries Science Center (U.S.)
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; AFSC (Alaska Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; AFSC (Alaska Fisheries Science Center) Less -
Description:

The following report provides an updated estimate of abundance for Pacific Coast Feeding Group (PCFG) gray whales through 2020 using data derived from the collaborative, multi-year photographic survey of gray whales in the eastern North Pacific. The data time series spans 25 years (1996-2020) and fifteen survey regions along the west coast of North America from Southern California to Kodiak, Alaska. The present analysis focuses on data for animals observed between 1 June and 30 November within one of three nested spatial domains: 1) the PCFG range defined by the International Whaling Commission encompassing coastal areas from northern California to northern British Columbia, Canada, including the western Strait of Juan de Fuca; 2) the region defined in the Makah Waiver Request encompassing coastal areas from southern Oregon to southern Vancouver Island, British Columbia, including the western Strait of Juan de Fuca; and 3) the Makah Usual and Accustomed Area encompassing portions of coastal northwestern Washington and the western Strait of Juan de Fuca.
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Abundance Gray Whale Photographic Survey Population Model
Series:

AFSC processed report ; 2022-05
DOI:

https://doi.org/10.25923/npvh-p785
Document Type:

Processed Report
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Public Domain
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Submitted
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urn:sha256:9c351117f9c05f6e40d951c75750b84a775483a5515ec2db9ad8e2505f92ca85
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https://repository.library.noaa.gov/view/noaa/46443/noaa_46443_DS1.pdf
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Recent trends in the abundance of seasonal gray whales (Eschrichtius robustus) in the Pacific Northwest, 1996-2020

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