Feeding Patterns of Barren-ground Grizzly Bears in the Central Canadian Arctic

Autor:	David F. Penner, Robert J. Gau, Ray L. Case, Philip D. McLoughlin
Rok vydání:	2002
Předmět:	education.field_of_study biology Ecology Grizzly Bears Fecal analysis Population Green vegetation organization biology.organism_classification organization.mascot Predation Geography Arctic Feeding patterns Ursus education Ecology Evolution Behavior and Systematics
Zdroj:	ARCTIC. 55
ISSN:	1923-1245 0004-0843
DOI:	10.14430/arctic717
Popis:	We collected 169 grizzly bear scats between 1994 and 1997 to determine the dietary habits of barren-ground grizzly bears ( Ursus arctos ) inhabiting Canada's central Arctic. From personal observations and fecal analysis, we concluded that barren-ground grizzly bears lead a predominantly carnivorous lifestyle and are effective predators of caribou ( Rangifer tarandus ). Caribou was a predominant diet item during spring, mid-summer, and fall. During early summer, grizzly bears foraged primarily on green vegetation. Berries increased in dietary importance in late summer. Declines in the caribou population of our study area or long-term absences of caribou may threaten the local grizzly bear population.
Databáze:	OpenAIRE
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