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Bears
Large wild mammals of the family Ursidae. Includes black and brown (grizzly) bears and polar bears.
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Results 1 - 9 of 9 listed by similarity [list alphabetically]
PDF Bear Spray Safety Program [More info]
Explains for USGS employees and volunteers how best to defend against bear attacks when conducting field studies.
PDF Catalogue of Polar Bear (Ursus maritimus) Maternal Den Locations in the Beaufort Sea and Neighboring Regions, Alaska, 1910-2010 [More info]
Approximate locations of 392 polar bear maternal dens found between 1910 and 2010, along with the method and year of discovery.
Grizzly bear and black bear ecology [More info]
Summaries of research projects on black bear and grizzly ecology and ecosystems supporting the populations and bibliography of related publications.
Interagency Grizzly Bear Study Team (IGBST) [More info]
Description of research program for immediate and long-term management of grizzly bears (Ursus arctos horribilis) inhabiting the Greater Yellowstone Ecosystem. Includes links to reports in PDF format and cooperating organizations.
Monitoring grizzly bear populations using DNA [More info]
Description of project monitoring the status of Greater Glacier National Park Area's grizzly bear and black bear populations using genetic techniques on DNA from bear hair or scats without handling bears, with photos and discussion of methods.
PDF Noninvasive methods for monitoring bear population trends [More info]
We estimate population growth rates by collecting hair at natural bear rubs along trails, roads, and fence and power lines, and analyzing the DNA from the hair.
Polar bear and walrus response to the rapid decline in Arctic sea ice [More info]
The Arctic is warming faster than other regions of the world due to positive climate feedbacks associated with loss of snow and ice. The USGS has modeled the future responses of polar bear and Pacific walrus populations to this environmental change.
Polar Bear research at the Alaska Science Center [More info]
Ecological studies of polar bears including population dynamics, dependence on sea ice, and tracking methods.
Changing Arctic ecosystems-Research to understand and project changes in marine and terrestrial ecosystems of the Arctic [More info]
Three themes of ongoing research: forecasting polar bear and walrus population response to changing marine ecosystems; measuring wildlife population changes in the Arctic coastal plain, and wildlife communities in the boreal-Arctic transition zone.
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