Summary and explanation of methods to estimate population size and sustainable mortality of Yellowstone grizzly bears
نویسندگان
چکیده
Charles R. Anderson, Jr., Trophy Game Section, Wyoming Game and Fish Department, Lander, WY 82520, USA Keith Aune, Research and Technical Services, Montana Fish, Wildlife and Parks, Helena, MT 59620, USA Kim Barber, U.S. Department of Agriculture, Forest Service, Shoshone National Forest, Cody, WY 82414, USA Dan Bjornlie, Trophy Game Section, Wyoming Game and Fish Department, Lander, WY 82520, USA Steve Cherry, Department of Mathematical Sciences, Montana State University, Bozeman, MT 59717, USA Kevin Frey, Wildlife Management Specialist, Montana Fish, Wildlife and Parks, Bozeman, MT 59717, USA Kerry Gunther, Bear Management Office, Yellowstone National Park, WY 82190, USA Lauri Hanauska-Brown, Idaho Department of Fish and Game, Idaho Falls, ID 83401, USA Mark A. Haroldson, U.S. Geological Survey, Northern Rocky Mountain Science Center, Interagency Grizzly Bear Study team, Montana State University, Bozeman, MT 59717, USA Richard B. Harris, Wildlife Biology Program, College of Forestry and Conservation, University of Montana, Missoula, MT 59812, USA Kim A. Keating, U.S. Geological Survey, Northern Rocky Mountain Science Center, Montana State University, Bozeman, MT 59717, USA Dave Moody, Trophy Game Section, Wyoming Game and Fish Department, Lander, WY 82520, USA Charles C. Schwartz, U.S. Geological Survey, Northern Rocky Mountain Science Center, Interagency Grizzly Bear Study team, Montana State University, Bozeman, MT 59717, USA Christopher Servheen, U.S. Fish and Wildlife Service, University of Montana, Missoula, MT 59812, USA
منابع مشابه
Whitebark Pine, Population Density, and Home-Range Size of Grizzly Bears in the Greater Yellowstone Ecosystem
Changes in life history traits of species can be an important indicator of potential factors influencing populations. For grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem (GYE), recent decline of whitebark pine (WBP; Pinus albicaulis), an important fall food resource, has been paired with a slowing of population growth following two decades of robust population increase. These ...
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During the past 2 decades, the grizzly bear (Ursus arctos) population in the Greater Yellowstone Ecosystem (GYE) has increased in numbers and expanded in range. Understanding temporal, environmental, and spatial variables responsible for this change is useful in evaluating what likely influenced grizzly bear demographics in the GYE and where future management efforts might benefit conservation ...
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Protein, mtDNA, and nuclear microsatellite DNA analyses have demonstrated that the Yellowstone grizzly bear has low levels of genetic variability compared with other Ursus arctos populations. Researchers have attributed this difference to inbreeding during a century of anthropogenic isolation and population size reduction. We test this hypothesis and assess the seriousness of genetic threats by...
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We present the first rigorous estimate of grizzly bear (Ursus arctos) population density and distribution in and around Glacier National Park (GNP), Montana, USA. We used genetic analysis to identify individual bears from hair samples collected via 2 concurrent sampling methods: 1) systematically distributed, baited, barbed-wire hair traps and 2) unbaited bear rub trees found along trails. We u...
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By necessity, grizzly bear demographic models have largely ignored spatial considerations (McLellan 1989, Eberhardt et al. 1994, Eberhardt 1995, Hovey and McLellan 1996). However, ignoring spatial heterogeneity is equivalent to assuming that individuals live in a homogeneous environment and that all members of the population experience the same environmental conditions at any point in time (Pul...
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