Results 171 to 180 of about 9,987 (212)

Ursus americanus subsp. emmonsii Dall 1895

2005
Ursus americanus subsp. emmonsii Dall 1895 Synonyms: Ursus americanus subsp. glacilis Kells 1897.
Wilson, Don E., Reeder, DeeAnn
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Ursicoptes americanus infestation of American black bears (Ursus americanus) in Virginia, USA

Veterinary Parasitology: Regional Studies and Reports
American black bears (Ursus americanus) admitted to a Virginia rehabilitation center were tested for Ursicoptes americanus. From 2014 to 2023, 23 of 150 (15.3 %) bears were positive with higher prevalence in juveniles and females. Several bears had localized or multifocal, moderate lesions or alopecia consistent with mange; however, some had no ...
Jillian, Broadhurst, Raquel, Francisco, Peach, Van Wick, Karra, Pierce, David, McRuer, Ernesto, Dominguez, Leigh-Ann, Horne, Jess, Ransier, Michael J, Yabsley   +8 more
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Ursus americanus (American black bear)

1967
One or two pairs of small acrocentrics often have secondary constrictions of the long arms near the centromere.
T. C. Hsu, Kurt Benirschke
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Breeding behavior of the American black bear Ursus americanus

Theriogenology, 2003
By means of videotape, we observed and timed courtship, mating, and refractoriness in the American black bear while confined in a semicaptive environment. Sixty-six courtships resulted in mating. During courtship, the male detected estrus and receptivity in the female. Courtship lasted 22.5+/-2.3s (mean+/-S.E.M.).
William R, Boone, M Elaine, Richardson, Jennifer A, Greer   +2 more
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Hypersensitivity Angiitis in a Dormant Black Bear (Ursus americanus)

Journal of the American Veterinary Medical Association, 1970
SUMMARY A captive, 1-year-old female black bear (Ursus americanus) developed severe necrotizing lesions on all 4 paws, nose, and both ears. The bear was being used as a subject in a winter dormancy study and had been given multiple drug injections. The gross lesions resembled those found in some human angiitides, especially Wegener's or lethal midline ...
R C, Simmonds, C L, Wells
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Renal microvasculature of the black bear (Ursus americanus).

Acta anatomica, 1988
This study of the Black bear (Ursus americanus) was undertaken to provide basic information related to structural modifications in the renal microvasculature that might provide insight into the drastic alteration in renal urinary output that occurs during winter sleep.
Anderson, B.G., Anderson, W.D., Seguin, R.J.   +2 more
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CLINICAL MANGE OF THE BLACK BEAR, Ursus americanus, ASSOCIATED WITH Ursicoptes americanus (ACARI: AUDYCOPTIDAE)

Journal of Wildlife Diseases, 1980
Numerous specimens of a mite, Ursicoptes americanus Fain and Johnston, 1970 (Acari: Audycoptidae), were found in skin scrapings from an aged female black bear, Ursus americanus, afflicted with a severe generalized mange. The mite had not been found previously in association with clinical dermatitis.
C E, Yunker, C E, Binninger, J E, Keirans, J, Beecham, M, Schlegel   +4 more
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Winter recreation and hibernating black bears Ursus americanus

Biological Conservation, 1994
Abstract The increase of recreational activities in winter wildlife habitats is of concern because wildlife populations are under considerable stress during winter. To assess the effects of winter activities on black bears Ursus americanus, denning ecology was studied for three winters in the Sierra Nevada and Sweetwater Mountains in Nevada and ...
John M. Goodrich, Joel Berger
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Ursus americanus Pallas 1780

Published as part of Hoffman, Justin D., Lester, Courtney, Doucet, Darian & Iguwe, Damilola, 2024, UPDATED CHECKLIST AND DISTRIBUTION Of WILD TERRESTRIAL MAMMALS IN LOUISIANA, pp.
Hoffman, Justin D., Lester, Courtney, Doucet, Darian, Iguwe, Damilola   +3 more
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Concept formation in American black bears, Ursus americanus

Animal Behaviour, 2012
Despite their large relative brain size, bears have been neglected in studies of comparative cognition in comparison to their fellow carnivores, the social canines and pinnipeds. Here, three captive adult American black bears were presented with a series of natural concept discrimination tasks on a touchscreen computer, in which the discriminations ...
Vonk, Jennifer, Jett, Stephanie E., Mosteller, Kelly W.   +2 more
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