Wildlife habitats in managed rangelands—The Great Basin of southeastern Oregon.

Abstract

Bighorn sheep were once abundant throughout Western North America. Since 1900, however, they have declined in most areas and many populations have been eliminated. Population declines have been attributed to hunting, to parasites and disease, and to competition with domestic livestock for forage, and with humans for space. Wildlife agencies in the western regions of Canada, the United States, and Mexico have initiated programs to maintain or enhance existing populations of bighorn sheep and to reintroduce them into historic ranges. But unless there is better land management, a decline of 8 percent can be expected in the next 25 years on land managed by the Bureau of Land Management (BLM), U.S. Department of the Interior.

Citation

Van Dyke, W.; Sands, A.; Yoakum, J.; Polenz, A.; Blaisdell, J. 1983. Wildlife habitats in managed rangelands���The Great Basin of southeastern Oregon. Gen. Tech. Rep. PNW-GTR-159. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 36 p