Variability in polar bear Ursus maritimus stable isotopes in relation to environmental change in the Canadian Beaufort Sea

2019 ◽  
Vol 630 ◽  
pp. 215-225 ◽  
Author(s):  
N Boucher ◽  
AE Derocher ◽  
ES Richardson
Keyword(s):  
Stable Isotopes ◽  
Environmental Change ◽  
Polar Bear ◽  
Beaufort Sea ◽  
Ursus Maritimus

Space use patterns affect stable isotopes of polar bears (Ursus maritimus) in the Beaufort Sea

Polar Biology ◽  
2019 ◽  
Vol 42 (8) ◽  
pp. 1581-1593
Author(s):  
Nicole P. Boucher ◽  
Andrew E. Derocher ◽  
Evan S. Richardson
Keyword(s):  
Stable Isotopes ◽  
Space Use ◽  
Beaufort Sea ◽  
Ursus Maritimus ◽  
Polar Bears ◽  
Use Patterns

scholarly journals Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas

2004 ◽  
Vol 118 (3) ◽  
pp. 395 ◽  
Author(s):  
Donald J. Hansen
Keyword(s):  
Habitat Use ◽  
Polar Bear ◽  
Beaufort Sea ◽  
Ice Cover ◽  
Ursus Maritimus ◽  
Bowhead Whale ◽  
Polar Bears ◽  
Management Service ◽  
Aerial Surveys ◽  
Sea Coast

A total of 1112 Polar Bears (Ursus maritimus) at 482 sightings were recorded during aerial surveys in the Beaufort, Chukchi, and northern Bering Seas conducted primarily during September and October from 1979-1999. Of these bears, 784 were observed offshore at 400 sightings. The surveys were conducted by the Naval Ocean Systems Center and Minerals Management Service; they were designed to monitor the fall Bowhead Whale (Balaena mysticetus) migration. Over the 20-year period, 1,096,620 kilometers of surveys were flown. The majority of the offshore Polar Bears, 595 bears at 290 sightings, and most of the kill sites and polar bear tracks were recorded in 80-100% ice cover. The number of bears per kilometer increased substantially in >24% ice cover, with the highest number observed in 80-100% ice cover. This habitat use probably is related to the availability of seals, their primary prey. There were 328 bears (83 sightings) recorded on land, and most of them were associated with whale carcasses and bowhead whale subsistence harvest sites along the Alaskan Beaufort Sea coast.

scholarly journals Iñupiaq Knowledge of Polar Bears (Ursus maritimus) in the Southern Beaufort Sea, Alaska

ARCTIC ◽  
2021 ◽  
Vol 74 (3) ◽  
pp. 239-257
Author(s):  
Karyn D. Rode ◽  
Hannah Voorhees ◽  
Henry P. Huntington ◽  
George M. Durner
Keyword(s):  
Sea Ice ◽  
Polar Bear ◽  
Late Summer ◽  
Beaufort Sea ◽  
Ursus Maritimus ◽  
The Arctic ◽  
Polar Bears ◽  
Structured Interviews ◽  
Ice Breakup ◽  
Pack Ice

Successful wildlife management depends upon coordination and consultation with local communities. However, much of the research used to inform management is often derived solely from data collected directly from wildlife. Indigenous people living in the Arctic have a close connection to their environment, which provides unique opportunities to observe their environment and the ecology of Arctic species. Further, most northern Arctic communities occur within the range of polar bears (nanuq, Ursus maritimus) and have experienced significant climatic changes. Here, we used semi-structured interviews from 2017 to 2019 to document Iñupiaq knowledge of polar bears observed over four decades in four Alaskan communities in the range of the Southern Beaufort Sea polar bear subpopulation: Wainwright, Utqiaġvik, Nuiqsut, and Kaktovik. All but one of 47 participants described directional and notable changes in sea ice, including earlier ice breakup, later ice return, thinner ice, and less multiyear pack ice. These changes corresponded with observations of bears spending more time on land during the late summer and early fall in recent decades—observations consistent with scientific and Indigenous knowledge studies in Alaska, Canada, and Greenland. Participants noted that polar bear and seal body condition and local abundance either varied geographically or exhibited no patterns. However, participants described a recent phenomenon of bears being exhausted and lethargic when arriving on shore in the summer and fall after extensive swims from the pack ice. Further, several participants suggested that maternal denning is occurring more often on land than sea ice. Participants indicated that village and regional governments are increasingly challenged to obtain resources needed to keep their communities safe as polar bears spend more time on land, an issue that is likely to be exacerbated both in this region and elsewhere as sea ice loss continues. 

scholarly journals Catalogue of polar bear (Ursus maritimus) maternal den locations in the Beaufort Sea and neighboring regions, Alaska, 1910–2010

Data Series ◽  
10.3133/ds568 ◽  
2010 ◽  
Author(s):  
George M. Durner ◽  
Anthony S. Fischbach ◽  
Steven C. Amstrup ◽  
David C. Douglas
Keyword(s):  
Polar Bear ◽  
Beaufort Sea ◽  
Ursus Maritimus

Studies on the footpads of the polar bear (ursus maritimus) and their possible relevance to accident prevention

1985 ◽  
Vol 10 (3) ◽  
pp. 303-307 ◽  
Author(s):  
D MANNING ◽  
J COOPER ◽  
I STIRLING ◽  
C JONES ◽  
M BRUCE ◽  
...  
Keyword(s):  
Polar Bear ◽  
Ursus Maritimus ◽  
Accident Prevention

Polar bear (Ursus maritimus) cub mortality at a den site in northern Alaska

Polar Biology ◽  
2011 ◽  
Vol 35 (1) ◽  
pp. 139-142 ◽  
Author(s):  
Rusty Robinson ◽  
Tom S. Smith ◽  
BJ Kirschhoffer ◽  
Cheryl Rosa
Keyword(s):  
Polar Bear ◽  
Ursus Maritimus ◽  
Northern Alaska

Climate-associated drivers of plasma cytokines and contaminant concentrations in Beaufort Sea polar bears (Ursus maritimus)

2020 ◽  
Vol 745 ◽  
pp. 140978
Author(s):  
Jennifer Bourque ◽  
Jean-Pierre Desforges ◽  
Milton Levin ◽  
Todd C. Atwood ◽  
Christian Sonne ◽  
...  
Keyword(s):  
Beaufort Sea ◽  
Ursus Maritimus ◽  
Polar Bears ◽  
Plasma Cytokines

Wabusk of the Omushkegouk: Cree-Polar Bear (Ursus maritimus) Interactions in Northern Ontario

Human Ecology ◽  
2010 ◽  
Vol 38 (6) ◽  
pp. 803-815 ◽  
Author(s):  
Raynald Harvey Lemelin ◽  
◽  
Martha Dowsley ◽  
Brian Walmark ◽  
Franz Siebel ◽  
...  
Keyword(s):  
Polar Bear ◽  
Ursus Maritimus ◽  
Northern Ontario
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