Because the numerical range of SSD for American black bears (6.6-17.0%) is narrow, it appears that, during this time period, similar selective pressures are acting on males and females during growth.
Body condition and growth dynamics of American black bears in northern Canada.
The American black bear (Ursus americanus) formally was widespread within Texas, but was listed as a state endangered species in 1987 (Doan-Crider & Hellgren 1996).
Researchers of the American black bear have ascertained that animals dispersing from the mountains of northern Mexico are recolonizing their historical habitats in the Trans-Pecos region of Texas (Onorato et al.
The American black bear
is featured in NWF's new giant-screen film, Bears, now showing in large-format theaters nationwide.
The West has more American black bears
(Ursus americanus) than any other part of the country (see partial map of black bear country at right).
Lactation, hibernation, and mass dynamics of American black bears and grizzly bears.
Bone prominence and skin-fold thickness as predictors of body fat and reproduction in American black bears. Ursus, 13:275-284.
In North America, hunters kill American black bears
and sell the gallbladders illegally.
IT is estimated there are at least 600,000 American black bears
, the smallest of the States' three bear species.
He was one of six Himalayan and American Black bears used in testing of the pilot ejection systems of the Convair B-58 Hustler - only to be later put down so the impact on their bodies could be determined by postmortem.
One American Black bear was discovered on autopsy to have a laceration of the liver which was attributed partially to an overdose of anaesthesia."
Records of permits obtained for importation of 'trophy parts' back to the UK reveal that in the past six years at least 40 African elephants, 32 leopards, 26 American black bears
, 18 polar bears, 16 cougars, 10 grizzly bears, seven cheetahs, six lions and six hippopotamuses have been killed.