Results 221 to 230 of about 7,621 (257)

Adoption in Polar Bears (Ursus maritimus)

1999
We observed a case of adoption of a single four-month-old polar bear cub (Ursus maritimus) into an existing litter of two cubs on Hopen Island, Svalbard. We believe the high density of maternity dens in the study area may increase the likelihood of natural adoption.
Derocher, A.E., Wiig, Ø.
openaire   +2 more sources

Fatal Hepatic Sarcocystosis in Two Polar Bears (Ursus maritimus)

The Journal of Parasitology, 1997
Fatal hepatic sarcocystosis was diagnosed in 2 polar bears from a zoo in Anchorage, Alaska. Gross lesions were icterus and systemic petechiae. Marked microscopic lesions were detected only in the liver and included severe random necrotizing hepatitis with hemorrhage.
H M, Garner, B C, Barr, A E, Packham, A E, Marsh, K A, Burek Huntington, R K, Wilson, J P, Dubney   +6 more
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Acquired Umbilical Hernias in Four Captive Polar Bears (Ursus maritimus)

Journal of Zoo and Wildlife Medicine, 2009
Umbilical hernias are a common occurrence in domestic animals and humans but have not been well documented in polar bears. Surgical reduction and herniorrhaphies were performed to correct acquired hernias in the region of the umbilicus in four adult captive polar bears (Ursus maritimus) housed in North American zoos.
Karen E, Velguth, Mark C, Rochat, Jennifer N, Langan, Kay, Backues   +3 more
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Antebrachial Fractures in Four Captive Polar Bears (Ursus maritimus)

Veterinary Surgery, 2005
Objective—To identify common risk factors for antebrachial fractures of captive polar bears and to evaluate outcome after fracture repair.Study Design—Retrospective study.Animals—Four captive polar bears.Methods—United States zoological collections were surveyed to determine the prevalence of fractures in captive polar bears. Medical records of captive
Rebecca C, Lin, Emmanuel, Engeli, Allan W, Prowten, Hollis N, Erb, Norm G, Ducharme, Laurie R, Goodrich   +5 more
openaire   +2 more sources

Geographic variation in growth of polar bears (Ursus maritimus)

Journal of Zoology, 1998
AbstractThe growth patterns of body length and head size in female and male polar bears (Ursus maritimus) in western Hudson Bay were compared with those of five other populations using the von Bertalanffy equation. Our objective was to determine if differences in growth patterns could account for higher reproductive rates reported in female polar bears
A. E. Derocher, I. Stirling
openaire   +1 more source

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
openaire   +3 more sources

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
openaire   +1 more source