Diet and feeding observations from an unusual beluga harvest in 2014 in Ulukhaktok, Northwest Territories, Canada

The Eastern Beaufort Sea (EBS) beluga (Delphinapterus leucas) population are an important traditional food for the Inuit of the Inuvialuit Settlement Region, Northwest Territories (NT) Canada. In 2014, over 30 beluga whales were harvested at Ulukhaktok, NT, the first occurrence for a large harvest i...

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Bibliographic Details
Published in:Arctic Science
Main Authors: Loseto, Lisa L., Brewster, Jasmine D., Ostertag, Sonja K., Snow, Kathleen, Macphee, Shannon A., Mcnicholl, Darcy G., Choy, Emily S., Giraldo, Carolina, Hornby, Claire A.
Other Authors: Laboratoire Ressources halieutiques Boulogne sur mer (LRHBL), Halieutique Manche Mer du Nord (HMMN), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2018
Subjects:
[SDV]Life Sciences [q-bio]
Arctic
Northwest Territories
Canada
Ulukhaktok
Arctic cod
Beaufort Sea
Beluga
Beluga*
Boreogadus saida
Delphinapterus leucas
inuit
Inuvialuit
Killer Whale
Killer whale
Online Access:https://hal.science/hal-04202063
https://doi.org/10.1139/as-2017-0046
Description
Summary:The Eastern Beaufort Sea (EBS) beluga (Delphinapterus leucas) population are an important traditional food for the Inuit of the Inuvialuit Settlement Region, Northwest Territories (NT) Canada. In 2014, over 30 beluga whales were harvested at Ulukhaktok, NT, the first occurrence for a large harvest in the area. Unlike observations from the established beluga harvest monitoring in the Mackenzie Estuary, these belugas had numerous prey and prey items in their stomachs. Our study objectives were to combine traditional and local knowledge (TLK) from beluga hunters with the analysis of dissected stomachs to identify EBS beluga diet, feeding behaviour, as well as gain insights into potential drivers of the event. TLK holders witnessed foraging behaviors such as herding schools of fish. Stomach dissections revealed Sandlance (Ammodytes sp.) to be the predominant prey species, comprising 90% of identified otoliths, occurring in 92% of stomachs. The low presence of Arctic Cod (Boreogadus saida) otoliths, a preferred prey, raised questions about availability/accessibility and if alternative prey can sustain beluga energetic needs. Based on interviews of TLK holders, avoidance of noise due to human activity, killer whale presence, and shifts in prey were factors that may have led to the increased beluga sightings near Ulukhaktok NT.

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