Results 221 to 230 of about 7,579 (247)

OMENTAL TORSION IN A CAPTIVE POLAR BEAR (URSUS MARITIMUS)

Journal of Zoo and Wildlife Medicine, 2014
This is the first case report of an omental torsion in a polar bear (Ursus maritimus). A captive, 23-yr-old, 250-kg, intact female polar bear presented to the University of Minnesota Veterinary Medical Center with a 2-day history of lethargy, depression, and vomiting.
Jose L, Mendez-Angulo, Francisco J, Funes, Ava M, Trent, Michelle, Willette, Kerry, Woodhouse, Anna C, Renier   +5 more
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Appetitive search behaviors and stereotypies in polar bears (Ursus maritimus)

Behavioural Processes, 2021
Stereotypies in captive animals have been defined as repetitive, largely invariant patterns of behavior that serve no obvious goal or function. Stereotypies are commonly attributed to boredom or stress and are typically treated by enriching captivity with distracting, appealing stimuli.
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CEREBRAL ARTERIOSCLEROSIS IN AN AGED CAPTIVE POLAR BEAR (URSUS MARITIMUS)

Journal of Zoo and Wildlife Medicine, 2002
Cerebral arteriosclerosis was observed upon necropsy of a 36-yr-old female captive polar bear (Ursus maritimus) that developed a sudden onset of seizure-like activity and died. The medium and large cerebral arteries of the meninges had moderate to severe diffuse discoloration and mineralization of the matrix of the tunica media, with little or no ...
Steven, McOrist, Flo, Tseng, Rich, Jakowski, John, Keating, Chris, Pearson   +4 more
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Steroid hormone profile in female polar bears (Ursus maritimus)

Polar Biology, 2015
The polar bear is an iconic Arctic species, threatened by anthropogenic impacts such as pollution and climate change. Successful reproduction of polar bears depends on a functioning steroid hormone system, which is susceptible to effects of persistent organic pollutants.
Gustavson, Lisa, Jenssen, Bjorn Munro, Bytingsvik, Jenny, Styrishave, Bjarne, Hansen, Martin, Aars, Jon, Eggen, Grethe S., Ciesielski, Tomasz M.   +7 more
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Hypospadias in a polar bear (Ursus maritimus).

Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians, 1999
Corrective surgery on a 1.5-yr-old male polar bear (Ursus maritimus) with hypospadias included amputation of the vestigial penis, bilateral orchiectomy with scrotal ablation, and distal perineal urethrostomy. Hypospadias in other species is a congenital deformity that may be caused by extra- and intrauterine factors resulting in a disruption of the ...
M A, Stamper, T, Norton, G, Spodnick, J, Marti, M, Loomis   +4 more
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Babesia sp. infection in a zoo-housed polar bear (Ursus maritimus)

Veterinary Parasitology: Regional Studies and Reports, 2019
A 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, Michael, Garner, Brittany, Thomas, Adam, Birkenheuer   +3 more
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Dental and Temporomandibular Joint Pathology of the Polar Bear ( Ursus maritimus )

Journal of Comparative Pathology, 2016
Museum 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, B. Arzi, D.M. Leale, P.H. Kass, F.J.M. Verstraete   +4 more
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Determinants of Home Range Size for Polar Bears (Ursus maritimus)

Ecology Letters, 1999
The 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, M K, Taylor, E W, Born, A, Rosing-Asvid, F, Messier   +4 more
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Chemical characterization of milk oligosaccharides of the polar bear, Ursus maritimus

Biochimica et Biophysica Acta (BBA) - General Subjects, 2000
Two 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, T, Yamashita, T, Nakamura, I, Arai, T, Saito, A E, Derocher, O, Wiig   +6 more
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Serosurvey of selected zoonotic agents in polar bears ( Ursus maritimus )

Veterinary Record, 2005
Between 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, B B, Chomel, E H, Follmann, R W, Kasten, C H, Hew, T B, Farver, G W, Garner, S C, Amstrup   +7 more
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