Appraising status of the Yellowstone grizzly bear population by counting females with cubs-of-the-year

摘要: The grizzly bear (Ursus arctos horribilis) in the lower United States was declared threatened 1975 under Endangered Species Act of 1973 (16 U.S.C. 1531-1544). According to that Act, U.S. Fish and Wildlife Service had prepare a plan recover populations levels where species could be conserved delisted from its status. Recovery Plan (U.S. 1993) uses counts distinct females with cubs-of-the-year as recovery parameter several ecosystems. total number these is assumed minimum cubs born current year. To our knowledge, this technique, methodology, value population indicator have never been adequately explained or discussed. Thus, we describe methodology assess potential for continued use Yellowstone ecosystem.