Grizzly Ursus arctos and black bear U. americanus densities in the interior mountains of North America
نویسندگان
چکیده
منابع مشابه
Aspects of Evolution and Adaptation in American Black Bears (Ursus americanus Pallas) and Brown and Grizzly Bears (U. arctos Linne.) of North America
Certain behavioural, ecological, morphological, and physiological differences between grizzly/brown bears and black bears a re related to the different habitats favored by each species. It is suggested that care of black bear cubs and hence reproductive success for black bears is tied to the forest biome, and that the grizzly/brown bear in branching out from the forest onto non-treed a reas suc...
متن کاملPredicting Grizzly Bear (Ursus arctos) densities in British Columbia using a multiple regression model
We determined the relationships between Grizzly Bear density and ultimate measures of ecosystem productivity and mortality at a landscape scale using multiple linear regression and field based density estimates from Grizzly Bear populations across western North America. We found that Grizzly Bear densities in non-coastal environments were positively related to the mean annual rainfall, to the p...
متن کاملGrizzly bears (Ursus arctos horribilis) and black bears (Ursus americanus) prevent trabecular bone loss during disuse (hibernation).
Disuse typically causes an imbalance in bone formation and bone resorption, leading to losses of cortical and trabecular bone. In contrast, bears maintain balanced intracortical remodeling and prevent cortical bone loss during disuse (hibernation). Trabecular bone, however, is more detrimentally affected than cortical bone in other animal models of disuse. Here we investigated the effects of hi...
متن کاملTetranucleotide microsatellite loci from the black bear (Ursus americanus).
We 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 four) and an average observed heterozygosity (H(O) ) ...
متن کاملPhysiology of the European brown bear (Ursus arctos arctos)
Although the American black (Ursus americanus) and American brown (grizzly) (Ursus arctos horribilis) bears have been the subjects of intensive physiological research, very little so far, has been done to understand the physiology of the European brown bear (Ursus arctos arctos). In our laboratory the research on the physiology of European brown bears started 10 years ago. Between 1987 and 1997...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Wildlife Biology
سال: 2005
ISSN: 0909-6396
DOI: 10.2981/0909-6396(2005)11[31:guaabb]2.0.co;2