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Babesia sp. infection in a zoo-housed polar bear (Ursus maritimus)
Veterinary Parasitology: Regional Studies and Reports, 2019A 28-year-old female polar bear (Ursus maritimus) housed in a zoo in Upstate New York presented with acute inappetence and lethargy. The bear's condition rapidly deteriorated, and because laboratory testing indicated severe hepatic and renal disease, the bear was humanely euthanized.
Louis, DiVincenti +3 more
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Dental and Temporomandibular Joint Pathology of the Polar Bear ( Ursus maritimus )
Journal of Comparative Pathology, 2016Museum specimens (maxillae and/or mandibles) from 317 polar bears (Ursus maritimus) were examined macroscopically according to predefined criteria and 249 specimens were included in this study. The specimens were acquired between 1906 and 2011. There were 126 specimens (50.6%) from male animals, 93 (37.3%) from female animals and 30 (12.1%) from ...
J.N. Winer +4 more
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Determinants of Home Range Size for Polar Bears (Ursus maritimus)
Ecology Letters, 1999The mean home range size of female polar bears (Ursus maritimus; 125 100 km2 ± 11 800; n = 93) is substantially larger than the predicted value (514 km2) for a terrestrial carnivore of similar weight. To understand this difference, we correlated home range size and sea ice characteristics. Home range size was related to (i) the ratio of land vs.
S H, Ferguson +4 more
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Chemical characterization of milk oligosaccharides of the polar bear, Ursus maritimus
Biochimica et Biophysica Acta (BBA) - General Subjects, 2000Two trisaccharides, three tetrasaccharides, two pentasaccharides, one hexasaccharide, one heptasaccharide, one octasaccharide and one decasaccharide were isolated from polar bear milk samples by chloroform/methanol extraction, gel filtration, ion exchange chromatography and preparative thin-layer chromatography.
T, Urashima +6 more
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Serosurvey of selected zoonotic agents in polar bears ( Ursus maritimus )
Veterinary Record, 2005Between 1982 and 1999 blood samples were collected from 500 polar bears ( Ursus maritimus ) captured in the Beaufort and Chukchi seas, to determine the seroprevalence of Brucella species, Toxoplasma gondii , and Trichinella
H, Rah +7 more
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Polar bear (Ursus maritimus) foraging ecology in spring
2015Polar bears (Ursus maritimus) enter a period of intensified feeding in the spring, which allows for the accumulation of energy stores critical to surviving the open water season. Study on polar bear predation has been limited by sample size and spatial extent, and hypotheses on the demographic composition of seal kills and the spatial distribution of ...
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Windscapes and olfactory foraging among polar bears (Ursus maritimus)
2017Understanding strategies for maximizing foraging efficiency is central to behavioural ecology. The theoretical optimal olfactory search is crosswind, however empirical evidence of anemotaxis (orientation to wind) among carnivores is sparse. Polar bear (Ursus maritimus) is a sea ice dependent species that relies on olfaction to locate prey.
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Viral and squamous papillomas in captive polar bears ( Ursus maritimus )
Veterinary PathologyPapillomas, many of which are virally induced, are common proliferative cutaneous and mucocutaneous lesions in multiple species, exhibiting characteristic histologic cytopathic changes that distinguish them from nonviral squamous papillomas. A single case report of a novel papillomavirus, Ursus maritimus papillomavirus-type 1, in a polar bear has been ...
Anna-Maria Travis +4 more
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Ponašanje polarnih medvjeda (Ursus maritimus) u uvjetima zatočeništva
1997Ponašanje polarnih medvjeda (Ursus maritimus) u uvjetima zatočeništva u Zoološkom vrtu grada Zagreba.
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