Plasma Protein Profile as an Index of Pregnancy in the Black Bear
We analyzed plasma protein profiles in an attempt to identify physiological parameters associated with pregnancy in black bears (Ursus americanus) that might be used as early confirmation of this reproductive state. We collected serial blood samples from 2 animals over 3 consecutive fall periods. Both females were pregnant during the 1st and 3rd years; cubs […]
The Effect of Radio Transmitter Harnesses on Free-Ranging Polar Bears
The Bear in the Classroom
Grizzly Bear Management on the Flathead Indian Reservation, Montana
Grizzly bears (Ursus arctos horribilis) inhabit the Mission Mountains on the Flathead Indian Reservation in western Montana. Their spring and fall foraging brings then to low elevations (975 m), where they have coexisted with a ranching economy since the 1900s. The goal of the 1981 Reservation Grizzly Bear Management Plan is to ‘secure and/or maintain […]
Computer-Assisted Management and Analysis of Biological Data for Bears
Statistical Analysis System (SAS) was used to provide continuous inventory, manipulation, and analysis of a wide range of biological information for black bears (Ursus americanus). We developed a computer-formatted field capture sheet to reduce transcribing effort and encoding errors, and to expedite data access. The system was flexible, easy to use, and versatile, allowing one […]
Using Grizzly Bear Habitat Evaluations to Locate Trails and Campsites in Kananaskis Provincial Park
Kananaskis Provincial Park (504 km2) is part of a large outdoor recreation area, Kananaskis Country (approximately 5,200 km2), near the city of Calgary (population 600,000). Kananaskis Country is undergoing major development for outdoor recreation. Recently, approximately $225 million have been spent on roading, trails, and facility construction. The alpine ski events of the 1988 Winter […]
Changes in Brown Bear Predation on Livestock in the Western French Pyrenees from 1968 to 1979
As a result of declining populations and habitat loss over the past decades, the Pyrenean brown bear (Ursus arctos Pyrenaicus) is limited to 2 isolated populations confined to remote areas of the Pyrenees. The remnant population in the western French Pyrenees is the largest and best known. Confronted with the lack of bear population data, […]
Diel Activity of Brown Bears in Plitvice Lakes National Park, Yugoslavia
We obtained 2,757 radiotelemetry activity readings, at 15-min intervals, from 2 brown bears (Ursus arctos) in Plitvice Lakes National Park. In late fall, while still with her family group, a yearling female was active during the day, but became nocturnal after her mother disapperared the following year. Her main rest period was from 0800 to […]
Responses of Grizzly Bears to Seismic Surveys in Northern Alaska
Responses of denning grizzly bears (Ursus arctos) to noise associated with winter seismic surveys and small fixed-wing aircraft were studied on the north slope of Alaska during the years 1978-81. Changes in signal amplitude and collar temperature were monitored in 4 bears denned near seismic lines. Heart rates monitored by implanted transmitters, were measured in […]
Brown Bear Activity and Habitat Use, Denali National Park: 1980
Brown bears (Ursus arctos) were observed in 2 alpine areas in Denali National Park, Alaska, in 1980. The dispersion and variety of habitat types and seasonal changes in food availability influenced use of the areas by brown bears. The presence of mated pairs apparently excluded family units. Habitat use and activities of bears were influenced […]
