Belly port camera imagery collected to address cetacean perception bias during aerial line-transect surveys: Methods and sighting summaries

Willoughby, A.; Ferguson, M.; Hou, B.; Accardo, C.; Rotrock, A.; Brower, A.; Clarke, J.; Hanlan, S.; Doremus, M. Foster; Pagan, K.; Barry, L.

doi:10.25923/apsb-c894

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Belly port camera imagery collected to address cetacean perception bias during aerial line-transect surveys: Methods and sighting summaries

2021
By Willoughby, A. ; Ferguson, M. ; Hou, B. ; ...
Series: NOAA technical memorandum NMFS-AFSC ; 427

[PDF-2.02 MB]

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Willoughby, A. ; Ferguson, M. ; Hou, B. ; Accardo, C. ; Rotrock, A. ; ... More +

Willoughby, A. ; Ferguson, M. ; Hou, B. ; Accardo, C. ; Rotrock, A. ; Brower, A. ; Clarke, J. ; Hanlan, S. ; Doremus, M. Foster ; Pagan, K. ; Barry, L. 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:

Cetacean aerial line-transect survey data have two inherent sources of visibility bias that result in missed animals: availability bias, which occurs when animals present within the field of view are undetectable because they are submerged, and perception bias, which occurs when animals within the field of view are available for detection but are missed by the observer. To estimate perception bias for large cetaceans during visual aerial surveys, imagery was concurrently collected on a downward-facing camera mounted to a port in the fuselage of Turbo Commander 600-840 survey aircraft in 2018 and 2019.
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Aerial Survey Belly Port Cetacean Marine Mammal Photo Analysis Sighting
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NOAA technical memorandum NMFS-AFSC ; 427
DOI:

https://doi.org/10.25923/apsb-c894
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Technical Memorandum
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Public Domain
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Submitted
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urn:sha256:1ecf88667bee8b0903e3fe4360b3522da35d91caadab6044463866bc5698717f
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https://repository.library.noaa.gov/view/noaa/32992/noaa_32992_DS1.pdf
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Belly port camera imagery collected to address cetacean perception bias during aerial line-transect surveys: Methods and sighting summaries

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