Trends of winter nutritional restriction, ticks, and numbers of moose on Isle Royale
Article Abstract:
Researchers studied moose in the Isle Royale National Park over seven years from 1987. They estimated numbers, studied winter nutritional restriction through the measurement of ratios of creatine to urea nitrogen in urine collected from snow, and noted a tick infestation. Results indicated that increased nutritional restriction and a decline in moose numbers in 1989-90 were related to a period of infestation with the winter tick. Moose numbers during that period fell to 1,216 from an estimated historic high of 1,653 in winter 1987-88. They increased to 1,880 in 1992-93 as the tick epizootic subsided.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1997
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Evaluating nutritional condition of grizzly bears via select blood parameters
Article Abstract:
The nutritional status of grizzly bears was examined using blood parameters. Bioelectrical impedance analysis was utilized to accurately determine the body composition of a free-ranging grizzly bear population from the central Arctic of the Northwest Territories in Canada. It was found that blood parameters are not significant indicators of nutritional condition in grizzly bears, with albumin and hemoglobin as the most common parameters associated with body condition via indices of body morphology.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1999
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Simulating nitrogen metabolism and urinary urea nitrogen: creatinine ratios in ruminants
Article Abstract:
Researchers developed a model of ruminant nitrogen and energy metabolism which predicts urinary urea nitrogen to creatine ratios. Researchers traditionally analyse these ratios in urine collected in snow to indicate levels of nutritional restriction in winter. The model, which was validated by comparing predicted and actual weight changes in moose, mule deer and white-tailed deer, demonstrates the physiological reasons for change in the ratios of urinary urea nitrogen to creatine.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1997
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