The Reintroduction of Orphaned Grizzly Bear Cubs into the Wild
Several techniques can be used to return captured orphaned bear cubs to the wild. They can be released immediately in suitable habitat, be adopted by another female with young, or be fattened and then released. The last technique was used successfully to return to the wild an orphaned cub obtained by the Border Grizzly Project […]
Movements of Radio-Instrumented Grizzly Bears within the Yellowstone Area
Grizzly bear (Ursus arctos horribilis) movement patterns were studied with the aid of 18 radio-instrumented grizzly bears in 1975 and 1976. Five bears gave minimal information because of death, transmitter failure, or loss of transmitters. Seasonal home range information is presented for 13 bears. Two bears, trapped inside Yellowstone National Park, included areas outside of […]
Factors Influencing Human-Grizzly Bear Interactions in a Backcountry Setting
Interactions between humans and 7 species of wildlife, including grizzly bears (Ursus arctos horribilis), were investigated in backcountry areas of the Gallatin Range, Yellowstone National Park, during the summers of 1973 and 1974. Grizzly bear distribution, movements, and behavior and human behavior were examined. Because grizzlies utilized areas with elevations much in excess of the […]
Possible Impacts of Hunting on the Grizzly/Brown Bear, a Threatened Species
Is hunting detrimental to bear populations? Or do harvests stimulate compensatory reproduction and decrease natural mortality among the survivors? When the literature was reviewed to evaluate support for the various sides of this controversy, data were found still inadequate for conclusions to be drawn. At best, available information can aid in distinguishing which additional data […]
Time-Lapse Cameras as an Aid in Studying Grizzly Bears in Northwest Wyoming
Time-lapse cameras were effective for gathering limited distribution and population data on grizzly bears (Ursus arctos) and black bears (Ursus americanus) in northwest Wyoming. Thirty-six stations, each consisting of a camera and a lure, were monitored for 551 camera-days; 83 rolls of film were exposed. Five different lures were tested. Thirty-one bears (5 grizzly, 25 […]
The Ecology of Winter Den Sites of Grizzly Bears in Banff National Park, Alberta
Forty-seven completed and partially dug grizzly bear (Ursus arctos) dens were examined in Banff National Park, Alberta, Canada, in 1975-76. The following environmental parameters were measured or estimated at most den sites: slope, aspect, altitude, soils, vegetation, snow accumulation, and age. Most environmental parameters studied had low variability. They appeared to be important in relation […]
Morphometric Characteristics of Brown Bears on the Central Alaska Peninsula
On the central Alaska Peninsula 344 different brown bears (Ursus arctos L.) were measured during 502 captures in 5 spring seasons, 1970-75. Height at shoulder, chest girth, total body length, body length, neck circumference, hind-foot length, zygomatic width, skull length, total skull size, and body weight were measured and classified by sex and cementum age. […]
Seasonal Movements of an Alaska Peninsula Brown Bear Population
On the central Alaska Peninsula, 344 different coastal brown bears (Ursus arctos L.) were immobilized and marked during 5 spring seasons. Between 1970 and 1976, the observed locations of 123 marked bears were determined 354 times, and the locations of 139 marked bears killed by hunters during spring and fall hunting seasons were recorded. Bears […]
Brown Bear Summer Use of Alpine Habitat on the Kodiak National Wildlife Refuge
Brown bear (Ursus arctos middendorffi) alpine summer habitat use patterns were studied at the Kodiak National Wildlife Refuge in 1973, 1974, and 1975. Seven plant communities were described and mapped within the alpine and subalpine zones of the 56.5-km2 study area. Single bears and family groups showed an almost exclusive preference for Carex macrochaeta as […]
Brown Bear Movements and Habitat Use at Karluk Lake, Kodiak Island
Since 1967, brown bears (Ursus arctos middendorffi) have been radiotracked in studies devoted to movements and use of habitat. A total of 487 contacts were made with 29 animals. The bears tended to move to Karluk Lake streams in July to feed on salmon. In August, they spent more time in the midlands to feed […]
