Home Range and Habitat Use of American Black Bears on a Desert Montane Island in Texas
American black bears (Ursus americanus) have recolonized Big Bend National Park (BIBE), Texas, in the past 15 years from adjacent habitat in northern Mexico. Range expansion by the Big Bend bear population across the Chihuahuan Desert landscape has considerable consequences for the recolonization of areas north of BIBE in western Texas (Glass, Del Norte, and […]
Reproductive Maturation and Senescence in the Female Brown Bear
Changes in age-specific reproductive rates can have important implications for managing populations, but the number of female brown (grizzly) bears (Ursus arctos) observed in any one study is usually inadequate to quantify such patterns, especially for older females and in hunted areas. We examined patterns of reproductive maturation and senescence in female brown bears by […]
Observations on Food Habits of Asiatic Black Bear in Kedarnath Wildlife Sanctuary, India: Preliminary Evidence on Their Role in Seed Germination and Dispersal
Effects of Pruning and Brush Clearing on Debarking within Damaged Conifer Stands by Japanese Black Bears
Anesthesia of Grizzly Bears Using Xylazine-Zolazepam-Tiletamine or Zolazepam-Tiletamine
The immobilization features and physiological effects of combinations of xylazine-zolazepam-tiletamine (XZT) and zolazepam-tiletamine (ZT) were compared in 46 wild grizzly bears (Ursus arctos) handled during 90 captures. Although induction time was similar between drugs, induction dosage and volume were less with XZT than with ZT. Induction of immobilization with XZT was predictable and smooth, and […]
Human Casualties and Livestock Depredation by Black and Brown Bears in the Indian Himalaya, 1989-98
We documented human casualties, livestock killings, and crop damage by Asiatic black (Ursus thibetanus) and brown bears (Ursus arctos) in the Great Himalayan National Park Conservation Area (GHNPCA), Himachal Pradesh, India, 1989-98. There were 3 human casualties by black bears and 355 livestock killings by black and brown bears. Maximum casualties occurred in alpine pastures […]
Brown Bear-Livestock Conflicts in a Bear Conservation Zone in Norway: Are Cattle a Good Alternative to Sheep?
We evaluated the potential for reducing livestock conflicts within a bear (Ursus arctos) conservation zone by replacing sheep with cattle. We interviewed cattle farmers and veterinarians and investigated livestock and depredation statistics from governmental land-use and wildlife management in Hedmark County, south-eastern Norway. This county borders a reproducing brown bear population in Sweden and already […]
Polar Bear-Human Interactions in Canadian National Parks, 1986-2000
Interactions between polar bears (Ursus maritimus) and humans in 6 national parks in the Canadian Arctic from 1986 to 2000 were examined (n = 53). No human fatalities and only 1 injury occurred. Bears were killed in only 4% of interactions, a much lower rate than in other studies, possibly because of the availability of […]
Knowledge and Opinions of Stakeholders of Black Bear Management in Virginia
Development of the Virginia black bear (Ursus americanus) management plan provided opportunities to examine stakeholder knowledge and opinions about bears and bear management as well as wildlife professionals’ opinions about key bear management issues and public involvement in decision making. We mailed self-administered questionnaires to members of 3 nongovernmental stakeholder organizations and Virginia Department of […]
Human Injuries Inflicted by Bears in Alberta: 1960-98
Between 1960 and 1998, bears caused 42 serious or fatal human injuries in the Province of Alberta-29 (69%) by grizzly (brown) bears (Ursus arctos) and 13 (31%) by American black bears (U. americanus). Considering Alberta’s estimated bear population-about 1,000 grizzly bears and 38,000-39,000 black bears-these numbers suggest that the grizzly bears are the more dangerous […]
