Results 181 to 190 of about 9,987 (212)

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 ...
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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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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
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Parasitic Helminths of Black Bear Cubs (Ursus americanus) From Florida

Journal of Parasitology, 2004
Twenty-two Florida black bear (Ursus americanus floridanus) cubs (< or = 12 mo old) from Florida were examined for endoparasites between 1998 and 2003. Eleven species of helminths were found (8 nematodes, 2 trematodes, and 1 acanthocephalan). The most prevalent helminths were Ancylostoma caninum (64%), Macracanthorhynchus ingens (36%), Strongyloides sp.
Garry W, Foster, Mark W, Cunningham, John M, Kinsella, Donald J, Forrester   +3 more
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Tetranucleotide microsatellite loci from the black bear (Ursus americanus)

Molecular Ecology Resources, 2009
AbstractWe describe primers and polymerase chain reaction conditions to amplify 21 tetranucleotide microsatellite DNA loci in black bears (Ursus americanus). We tested primers using individuals from two populations, one each in Georgia and Florida. Among individuals from Georgia (n = 29), primer pairs yielded an average of 2.9 alleles (range, one to ...
Jamie Skvarla, Sanderlin, Brant C, Faircloth, Brian, Shamblin, Michael J, Conroy   +3 more
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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
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Helminths of the Black Bear, Ursus americanus, in New Brunswick

The Journal of Parasitology, 1994
Between May 1989 and October 1991, 544 black bears Ursus americanus were collected in New Brunswick and examined for Trichinella spiralis larvae. In addition, 110 of these bears were examined for filarial nematodes, and the entire intestinal tracts of 12 bears were examined for intestinal helminths.
M S, Duffy, T A, Greaves, M D, Burt
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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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Ursus americanus subsp. perniger J. A. Allen 1910

2005
Published as part of Wilson, Don E. & Reeder, DeeAnn, 2005, Order Carnivora, pp. 532-628 in Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1, Baltimore :The Johns Hopkins University Press on page 588, DOI: 10.5281/zenodo ...
Wilson, Don E., Reeder, DeeAnn
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Spatial memory in captive American black bears (Ursus americanus).

Journal of Comparative Psychology, 2012
The spatial memory and foraging strategies of four adult captive-born American black bears (Ursus americanus) were explored in four experiments using a simulated foraging task. In the first three experiments, each session consisted of two phases separated by a delay: During the exploration phase, subjects foraged among a set of baited and unbaited ...
Zamisch, Valeria, Vonk, Jennifer
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