Results 151 to 160 of about 3,849 (210)

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
openaire   +2 more sources

SEROLOGY AS A TOOL TO INVESTIGATE SARCOPTIC MANGE IN AMERICAN BLACK BEARS (URSUS AMERICANUS)

Journal of Wildlife Diseases, 2019
: Black bears (Ursus americanus) have historically been considered an uncommon host for sarcoptic mange. However, over the last 25 yr, sarcoptic mange has been increasingly reported in black bears in the northeastern US.
Kevin D. Niedringhaus, Justin D Brown, Mark A. Ternent, Sarah K. Peltier, Peach Van Wick, M. Yabsley   +5 more
semanticscholar   +1 more source

Increased trophic position of black bear (Ursus americanus) at the northern fringe of its distribution range

, 2020
Studies describing the diet of omnivorous species are abundant, but the drivers affecting the balance between animal and plant resources remain unclear.
Michaël Bonin, C. Dussault, S. Côté
semanticscholar   +1 more source

PATHOGEN PREVALANCE IN AMERICAN BLACK BEARS (URSUS AMERICANUS AMBLYCEPS) OF THE JEMEZ MOUNTAINS, NEW MEXICO, USA.

Journal of Wildlife Diseases, 2019
Informed management of American black bears (Ursus americanus) requires knowledge of the distribution and pathology of diseases affecting the species.
S. Bard, J. W. Iii
semanticscholar   +1 more source

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
openaire   +1 more source

MOTOR CORTEX OF THE BEAR (URSUS AMERICANUS)

Archives of Neurology & Psychiatry, 1933
Before 1870, the doctrine that the cerebral cortex was inexcitable to artificial stimulation was generally held by investigators. As early as 1756, Haller 1 reported a series of experiments performed six years before on dogs, cats and goats by his pupil Zinn, in which he was unable to produce muscular movements by mechanical or chemical irritation ...
openaire   +1 more source

Picture object recognition in an American black bear (Ursus americanus)

Animal Cognition, 2016
Many animals have been tested for conceptual discriminations using two-dimensional images as stimuli, and many of these species appear to transfer knowledge from 2D images to analogous real life objects. We tested an American black bear for picture-object recognition using a two alternative forced choice task. She was presented with four unique sets of
Zoe, Johnson-Ulrich, Jennifer, Vonk, Mary, Humbyrd, Marilyn, Crowley, Ela, Wojtkowski, Florence, Yates, Stephanie, Allard   +6 more
openaire   +2 more sources

Biochemical changes in skeletal muscles of denning bears (ursus americanus)

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1991
1. Biopsies of the extensor hallucis longus (EHL) and gastrocnemius (G) muscles of four captive black bears (Ursus americanus) were obtained prior to denning (PRE), during denning (DEN) and following the Spring arousal (POST). 2. Glycogen, triglyceride and protein concentrations did not differ significantly between the three groups.
D A, Koebel, P G, Miers, R A, Nelson, J M, Steffen   +3 more
openaire   +2 more sources

First Photo Evidence of the American Black Bear (Ursus americanus) in the Southwestern Limit of Its Distribution

Western North American Naturalist, 2019
. We present the first photographic evidence of the American black bear (Ursus americanus) in the southwestern limit of its distribution, representing the second record from the state of Hidalgo and the first photographic evidence of a live specimen in
Melany Aguilar-López, Jazmín L. Monter-Vargas, Cristian Cornejo-Latorre, Anuar Hernández-Saintmartin   +3 more
semanticscholar   +1 more source

Black Bear (Ursus americanus) Bile Composition: Seasonal Changes

Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology, 1997
Gallbladder contents from 8 active and 14 dormant black bears were analyzed for individual bile acids by high-performance liquid chromatography and for cholesterol, phospholipids, sodium, potassium, calcium, magnesium, zinc, iron, and copper.
J D, Jones, P E, Zollman
openaire   +2 more sources