Results 111 to 120 of about 30,014 (151)

Lactation, hibernation, and mass dynamics of American black bears and grizzly bears

Canadian Journal of Zoology, 1995
Milk composition and intake, cub growth, and mass loss of hibernating lactating and nonlactating American black bears (Ursus americanus) and grizzly bears (Ursus arctos horribilis) were investigated. Except for ash content, milk composition was similar between species.
Sean D. Farley, Charles T. Robbins
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American black bear mating behavior and chemosensation of estrus

Ursus, 2013
Abstract Quantitative documentation of bear (Ursidae) mating behavior is sparse and incomplete. Understanding subtleties of mating behavior and how it differs between successful and unsuccessful mate pairings is a crucial first step to permit empirical testing of sexual selection hypotheses and to inform captive breeding efforts.
Ramona L. Gonzales, Alejandra V. Mendoza, Brendan M. Himelright, Jenna M. Moore, Thomas J. Spady   +4 more
openaire   +1 more source

Movement behavior explains genetic differentiation in American black bears

Landscape Ecology, 2010
Individual-based landscape genetic analyses provide empirically based models of gene flow. It would be valuable to verify the predictions of these models using independent data of a different type. Analyses using different data sources that produce consistent results provide strong support for the generality of the findings.
Samuel A. Cushman, Jesse S. Lewis
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Determinants of male reproductive success in American black bears

Behavioral Ecology and Sociobiology, 2009
We determined annual male reproductive success in black bears (Ursus americanus) using DNA and field data from two populations in New Mexico. We identified the likely father for 78 of 120 genotyped cubs born during 1994–2000 and calculated reproductive success for 102 males known or presumed present within designated mating regions.
Cecily M. Costello, Scott R. Creel, Steven T. Kalinowski, Ninh V. Vu, Howard B. Quigley   +4 more
openaire   +1 more source

Population genetics of American black bears in Georgia, USA

Ursus, 2019
There are 3 American black bear (Ursus americanus) populations in the state of Georgia, USA. We used multi-locus microsatellite genotypes derived from bear hair and tissue samples collected across these populations to assess levels of genetic diversity within and between populations.
Michael J. Hooker, Bobby T. Bond, Michael J. Chamberlain   +2 more
openaire   +1 more source

Training North American Black Bears for Blood Draws

2010
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Composition of fat from a North American black bear

Oil & Soap, 1943
The physical and chemical constants have been determined on a sample of bear fat of known history. The values are within the range of those reported in the literature.
R. A. Rasmussen, P. W. Morgal, E. J. Miller   +2 more
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Survival of rehabilitated yearling American black bears

Ursus, 2022
Rachael E. Urbanek, Mike N. Gillikin, Colleen Olfenbuttel, Casey G. Dukes   +3 more
openaire   +1 more source

Fibroma in an American black bear

Journal of the American Veterinary Medical Association, 1982
W B, Karesh, J D, Clark, P H, Long
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Cardiovascular Autonomic Control During Hibernation in American Black Bears

Physiology
The dramatic early decrease in HR upon entry into torpor in small hibernators has recently been shown to be associated with a marked increase in cardiac parasympathetic activity as indicated by increased short term beat to beat heart rate variability (RMSSD) normalized to average R-R interval (RMDSSD/RR, Zanetti et al 2023). At steady state torpor, as
Øivind Tøien, Chao-Yin Chen, H. Craig Heller, Brian M. Barnes   +3 more
openaire   +1 more source