Results 21 to 30 of about 13,981 (252)
PLoS ONE, 2013 Recent studies have reported discordant gene trees in the evolution of brown bears and polar bears. Genealogical histories are different among independent nuclear loci and between biparentally inherited autosomal DNA (aDNA) and matrilineal mitochondrial ...
Shigeki Nakagome +2 more
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Frontiers in Conservation Science, 2023 Polar bears rely upon sea ice to hunt, travel, and reproduce. Declining sea ice extent and duration has led polar bears to be designated as “threatened” (ESA). Population monitoring is vital to polar bear conservation; but recently, poor sea ice has made
Andrew L. Von Duyke +4 more
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Ursids evolved early and continuously to be low-protein macronutrient omnivores
Scientific Reports, 2022 The eight species of bears world-wide consume a wide variety of diets. Some are specialists with extensive anatomical and physiological adaptations necessary to exploit specific foods or environments [e.g., polar bears (Ursus maritimus), giant pandas ...
Charles T. Robbins +7 more
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Frontiers in Marine Science, 2022 Successful conservation efforts often require novel tactics to achieve the desired goals of protecting species and habitats. One such tactic is to develop an interdisciplinary, collaborative approach to ensure that conservation initiatives are science ...
Ashleigh M. Westphal +8 more
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Drone Systems and Applications, 2022 Climate-induced sea-ice loss represents the greatest threat to polar bears (Ursus maritimus Phipps, 1774), and utilizing drones to characterize behavioural responses to sea-ice loss is valuable for forecasting polar bear persistence.
Patrick M. Jagielski +5 more
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Observation of a Polar Bear with Rabies [PDF]
Journal of Wildlife Diseases, 1991 On 1 November 1989 the first confirmed case of rabies in a polar bear (Ursus maritimus) was encountered by Inuit hunters in the vicinity of Cape Kendall, Southampton Island, Northwest Territories (Canada). The adult male polar bear had posterior paralysis.
M, Taylor +3 more
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IMMOBILIZATION OF POLAR BEARS WITH CARFENTANIL [PDF]
Journal of Wildlife Diseases, 1983 Sixty-four free-ranging polar bears (Ursus maritimus) were immobilized using carfentanil at doses ranging from 1.0–38.0 μg/kg (mean 20 ± 8 μg/kg). Induction was rapid (5.0 min) (n = 46) and the bears showed good muscle relaxation. Respiratory rate was depressed (mean 3.8 bpm). The mean arousal after the administration of narcotic antagonists was longer
J C, Haigh, L J, Lee, R E, Schweinsburg
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Using tri-axial accelerometers to identify wild polar bear behaviors
Endangered Species Research, 2017 Tri-axial accelerometers have been used to remotely identify the behaviors of a wide range of taxa. Assigning behaviors to accelerometer data often involves the use of captive animals or surrogate species, as their accelerometer signatures are generally ...
Pagano, AM +12 more
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Frontiers in Marine Science, 2018 In Greenland, polar bears (Ursus maritimus) are nutritional, economic, and cultural subsistence resources for Inuit. Traditional Ecological Knowledge (TEK) collected from subsistence hunters can provide important insights and improve management decisions
Kristin L. Laidre +2 more
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Are polar bear habitat resource selection functions developed from 1985–1995 data still useful?
Ecology and Evolution, 2019 Greenhouse‐gas‐induced warming in the Arctic has caused declines in sea ice extent and changed its composition, raising concerns by all circumpolar nations for polar bear conservation.
George M. Durner +2 more
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