Field Tests of Potential Polar Bear Repellents
Field tests of potential repellents were made on free-ranging polar bears (Ursus maritimus) near Churchill, Manitoba, from 11 October through 12 November 1978. Polar bears were attracted to an observation/testing area with sardine baits at 11 sites. Commercial dog repellents and household chemicals were tested for their ability to keep bears from visiting baited sites, […]
Visitor Impact on Brown Bears, Admiralty Island, Alaska
Human disturbance of brown bears (Ursus arctos) was studied in the Pack Creek area of Admiralty Island in Southeast Alaska during the summers of 1983 and 1984. The Pack Creek watershed has been closed to bear hunting since 1934, but use of the area by bear watchers and photographers is increasing. Instantaneous scan sampling and […]
Arkansas Black Bear Hunter Survey
Questionnaires were mailed to black bear (Ursus americanus) hunters in Arkansas following the 1980-84 bear seasons to determine participation, hunter success, and number of bears observed by hunters. Man-days of hunting to harvest a bear ranged from 148 to 671 and hunter success ranged from 0.4% to 2.2%. With the exception of 1980, number of […]
Movements and Rates of Return of Translocated Black Bears in Virginia
From 1970 to 1984, 540 black bears (Ursus americanus) were trapped and released. Of the 540 bears captured, 240 were released at the trap site and 300 were translocated to different areas. A total of 186 bears were recovered, most of them legally harvested by hunters. Trap, release, and recovery sites were plotted on topographic […]
Approaches to Augmenting Grizzly Bear Populations in the Cabinet Mountains of Montana
The grizzly bear (Ursus arctos horribilis) in the Cabinet Mountains of Montana is threatened and the population may consist of as few as 15 individuals. Survival of this semi-isolated population depends on innovative habitat and population management techniques. Because potential for immigration into this population is low and the population is small, population augmentation is […]
Interpopulation Applicability of Equations to Predict Live Weight in Black Bears
Body measurements and live weights were obtained from 3 black bear (Ursus americanus) populations in Montana. Although high correlation coefficients were usually found between log10 of weight and log10 of chest girth and between weight and a body size index (total length times chest girth squared), the regressions were significantly heterogeneous (P < 0.05) between […]
Changes in Serum Progesterone Levels and Growth of Fetuses in Hokkaido Brown Bears
Serum progesterone levels in 5 female Hokkaido brown bears (Ursus arctos yesoensis) were determined from April 1983 to April 1985. Four females were mated with males, while the 5th female was segregated to serve as a control. The growth of fetuses in 2 females was monitored by ultrasonography at 10-day intervals during December and January. […]
On Serum Chemistry of Brown Bears in Croatia, Yugoslavia
Blood samples were taken from 8 free-living European brown bears (Ursus arctos) from Plitvice Lakes National Park, Croatia, Yugoslavia, and 4 captive European brown bears from the Zagreb Zoological Park; zoo bears served as a control group. Up to 13 serum chemistry parameters were measured from each sample. Results revealed that the capture procedure provoked […]
Blood Chemistry, Hematology, and Condition Evaluation of Black Bears in Northcoastal California
I used blood chemistry and hematology to evaluate the physical condition of black bears (Ursus americanus). Analyses were performed on 70 blood samples taken from 55 live-captured black bears in the redwood (Sequoia sempervirens) region in northcoastal California. Blood parameters analyzed included calcium, inorganic phosphorus, total protein, albumin, creatinine, blood urea nitrogen (BUN), glucose, cholesterol, […]
Leucine Metabolism in the Black Bear
Metabolism of the essential amino acid leucine was studied in 3 black bears (Ursus americanus) in February while the bears were denning and not eating or drinking and in May while they were eating and drinking normally. (U-^14C) leucine was injected as a bolus intravenously, and timed samples of venous blood were obtained over an […]
