Following section Mattson, R.Gerald Wright, Katherine C. Kendall, Clifford J. Martinka, National Biological Service. Grizzly bears once roamed over most the USA, to the Pacific coast from the plains. Their contact with these bears increased as settlers moved west across the Great Plains. Bears are competitors for foods valued by humans, including crops and livestock, and under specific conditions. For reasons and these, grizzly bears killed by settlers in the 1800 and 1900 s. And from the US were sought out Between 1850 and 1920 bears were eliminated with extirpation happening most early on the Great Plains, from 95% of their original selection and afterwards in areas.
Killing of bears continued throughout the 50s in places and caused a 52% decrease. Bears survived this period of slaughter in wilderness areas bigger. Altogether bears were eliminated during a 100 year period from 98% of the original range in the contiguous USA. Preventing Grizzlies - Because of the status of grizzly bears and the decline in their numbers in areas where they'd survived, their populations in the contiguous USA were recorded as threatened under the Endangered Species Act. High degrees of grizzly bear mortality in That the Yellowstone area throughout the early 70s were also a major impetus for this listing.
Grizzly sparks persist as identifiable populations in five places : That the Northern Continental Divide, Greater Yellowstone, Cabinet Yaak, Selkirk, and North Cascade ecosystems. Each one of all these populations except Yellowstones have some connection with grizzly in southern Canada, even though the current future and status prospects of Canadian sparks are subject to debate. The U.S. Portions of those five populations exist from designated recovery areas, where they receive full protection of That the Endangered Species Act. Grizzly bears can occur in two other areas: That the San Juan Mountains of southern Colorado and That the Bitterroot ecosystem of Idaho and Montana. There are no plans to increase or recovering grizzlies from That the San Juan Mountains, but serious consideration has been given to reintroducing grizzlies to That the Bitterroots as an experimental nonessential population. Grizzly Bears in the North Waterfall of Washington - Hudson Bay Company income records show that 3, 788 grizzly bear skins were shipped out of trading posts in That the North Cascades area between 1827 and 1859. The decimation of That the North Cascades grizzly bear population lasted for more than a century with commercial trapping, habitat loss, and unregulated hunting the main causes of death.
