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Terrestrial Polar Bear Den Locations: Beaufort Sea Population
Female polar bears den during the winter they give birth to young. Other polar bears do not
den, but are active year-round.
The pink dots show den locations of female polar bears from the Beaufort Sea population.
This map shows the distribution of maternal dens occupied by radio-collared polar bears
between 1981 and 2000 on the mainland coast of Alaska and Canada. Of 53 dens located along
the mainland coast, 26 (50%) were within the bounds of the Arctic National Wildlife
Refuge. Twenty-two of the 53 dens (42%) were within the bounds of the 1002 area.
Other dens have been located on the Alaska north slope since the turn of the century, but
these observations cannot be considered to have an unbiased distribution since visual searches
only locate dens in areas where investigators look. However, the dens shown on this map
represent an unbiased estimate of denning distribution because the radio-collared bears led
investigators to the den sites. Statistical tests (see below) confirmed that the distribution
of these dens was not biased by the distribution of the sampling (radio-tagging) efforts.
Sources for this information are: 1. Arctic 46:246-250, Human disturbances of denning polar
bears in Alaska; 2. Journal of Wildlife Management 58:1-10, Polar bear maternity denning in the
Beaufort Sea and 3) Amstrup (unpubl. data). Interested parties are strongly encouraged to consult
those sources for information on the locations of dens, descriptions of the research methods,
interpretations of the data, and evaluations of their management ramifications.
Note: This is the MapCruzin.com archive of the FWS Arctic National Wildlife Refuge website. In December, 2001 FWS took this website offline, making it unavailable to the public. It includes 90 plus pages of information and many maps. As of 2006 the important information contained in this, the original "unsanitized" version of the FWS website, has yet to return to the internet, so we will continue to maintain it here as a permanent archive to help inform activists and concerned citizens. If you find any broken links, please report them to me at mike@learn2map.com and I will attempt to make the repairs. January, 2008 update - A small part of the original information that was present in 2001 has made it back into the current ANWR website. There is also an archive that contains a small amount of the original information, but it is not readily available from the main website.
Click here to visit our homepage. Click here for NRDC's message about ANWR from Robert Redford.
U.S. Fish and Wildlife Service. 2001. Potential impacts of proposed oil and gas
development on the Arctic Refuge’s
coastal plain: Historical overview and
issues of concern. Web page of the Arctic National
Wildlife Refuge,
Fairbanks, Alaska.
17 January 2001. http://arctic.fws.gov/issues1.html
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January 29, 2008: 
