Results 161 to 170 of about 3,849 (210)

Ursus Americanus: The Idea of a Bear

2005
The sound of splintering glass, the mesh, metal screen being torn from the window, shakes me. Instinctively I awake shouting, without thinking, still half-dreaming of something mundane and pleasant. The rotting wooden frame that holds the pane falls onto the foot of my bed, pushed in by the black bear outside my cabin.
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Seasonal variation in blood viscosity of the black bear (Ursus americanus)

Comparative Biochemistry and Physiology Part A: Physiology, 1972
Abstract 1. 1. Measurements of blood viscosity of Ursus americanus during autumn, winter and spring were carried out. 2. 2. Blood viscosity was highest in the autumn and lowest in the spring. 3. 3. There is some evidence that this decrease in viscosity is related to the red cells.
G C, Halikas, K, Bowers
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Induction of pseudopregnancy in the American Black Bear (Ursus americanus)

Journal of Experimental Zoology Part A: Comparative Experimental Biology, 2003
AbstractThe aim of this study was to determine whether American Black Bears (Ursus americanus) can experience a pseudopregnancy of the same duration as pregnancy. To do this, we treated three nonmated, captive female bears with human chorionic gonadotropin (hCG) during one breeding season, and saline during another.
Laura Clamon, Schulz, Ralph A, Nelson, Leah M, Pyter, Janice M, Bahr   +3 more
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CRETINISM IN A NORTH AMERICAN BLACK BEAR(URSUS AMERICANUS)

Veterinary Radiology & Ultrasound, 2002
Congenital hyperplastic goiter and cretinism were documented in a 16 month‐old male North American black bear (Ursus americanus). The cub was captured at approximately 8 months of age and maintained for an additional 8 months in captivity. Clinical signs included growth retardation, clumsiness, and facial dysmorphism.
Robert B, Duncan, Jeryl C, Jones, H David, Moll, Martha M, Moon, Dennis J, Blodgett, Michael R, Vaughan   +5 more
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Human-provisioned foods reduce gut microbiome diversity in American black bears (Ursus americanus)

Journal of Mammalogy, 2021
S. J. Gillman, Erin A. McKenney, Diana J. R. Lafferty   +2 more
semanticscholar   +1 more source

Prevalence of Sarcocysts in Florida Black Bears (Ursus americanus floridanus)

Journal of Parasitology, 2002
Sections of muscle from Florida black bears (Ursus americanus floridanus) collected in the state of Florida were observed for the presence of Sarcocystis sp. sarcocysts. Two of 132 (1.5%) black bears had muscle sections containing sarcocysts. One sarcocyst was observed per muscle section.
M A, Cheadle, M W, Cunningham, E C, Greiner   +2 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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Color Change in the Black Bear, Ursus americanus

Journal of Mammalogy, 1955
Mr. William J. Sheffler of Los Angeles, California gave me an account of his experience with a cub bear that appears to me to warrant placing on record. Mr. Sheffler is a naturalist with a lifelong interest in animals and much experience in field collecting of birds and mammals of western United States and Mexico.
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Black bears (Ursus americanus) in northeastern Labrador

2001
Ten black bears in the Voisey's Bay area of Labrador were studied in 1996 and 1997 using GPS and VHF radio telemetry. GPS collars recorded location and movement activity, but did not operate as long as expected. The short life span of the GPS collars was attributed to battery malfunction.
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Distribution and Analysis of Colourmorphs of the Black Bear (Ursus americanus)

Journal of Biogeography, 1987
Records on colour and location of >40,000 black bears (Ursus americanus) were gathered from the United States and Canada. Corollary information on subspecies, sex, age, year, habitat and past or present association with grizzly bears (Ursus arctos) was available for >11,000 black bears.
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