Sexual behavior in Hokkaido brown bears (Ursus arctos yesoensis) in a small group under captive conditions.

Humeral chondrosarcoma in a Hokkaido brown bear (Ursus arctos yesoensis).

Humeral chondrosarcoma was found in an 18-year-old male Hokkaido brown bear (Ursus arctos yesoensis). Necropsy revealed a large firm mass under the left superficial pectoral muscle at the axillary region. The mass involved the left shoulder joint and peripheral muscles, and connected to the head of the humerus with osteolysis. Histopathologically, the mass was composed of irregularly shaped myx...

Estimate of genetic variations in Hokkaido brown bears (Ursus arctos yesoensis) by DNA fingerprinting.

Genetic variations within and between local populations of Hokkaido brown bears, Ursus arctos yesoensis, were quantified by means of DNA fingerprinting using a minisatellite DNA probe. The estimates of the average heterozygosity (gene diversity) H were 0.302 and 0.241 for the populations on the southwestern part of the Oshima peninsula and the Shiretoko peninsula, respectively. These values sug...

Medetomidine-tiletamine-zolazepam in brown bears (Ursus arctos): Test of high doses in captive animals

Management of Brown Bears (Ursus arctos) in Europe

Genetic relationships of extant brown bears (Ursus arctos) and polar bears (Ursus maritimus).

Polar bears (Ursus maritimus) and brown bears (Ursus arctos) are closely related species for which extensive mitochondrial and nuclear phylogenetic comparisons have been made. We used previously published genotype data for 8 microsatellite DNA loci from 930 brown bears in 19 populations and 473 polar bears in 16 populations to compare the population genetic relationships of extant populations o...