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Polar Bears

Biological Science Report 2002-0001-8

By:
Edited by:
David C. Douglas ORCID iD , Patricia E. Reynolds , and E.B. Rhode

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Abstract

Polar bears (Ursus maritimus) are hunted throughout most of their range. In addition to hunting polar bears of the Beaufort Sea region are exposed to mineral and petroleum extraction and related human activities such as shipping road-building, and seismic testing (Stirling 1990).

Little was known at the start of this project about how polar bears move about in their environment, and although it was understood that many bears travel across political borders, the boundaries of populations had not been delineated (Amstrup 1986, Amstrup et al. 1986, Amstrup and DeMaster 1988, Garner et al. 1994, Amstrup 1995, Amstrup et al. 1995, Amstrup 2000).

As human populations increase and demands for polar bears and other arctic resources escalate, managers must know the sizes and distributions of the polar bear populations. Resource managers also need reliable estimates of breeding rates, reproductive intervals, litter sizes, and survival of young and adults.

Our objectives for this research were 1) to determine the seasonal and annual movements of polar bears in the Beaufort Sea, 2) to define the boundaries of the population(s) using this region, 3) to determine the size and status of the Beaufort Sea polar bear population, and 4) to establish reproduction and survival rates (Amstrup 2000).

Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
Federal Government Series
Title:
Polar Bears
Series title:
Biological Science Report
Series number:
2002-0001
Chapter:
8
Year Published:
2002
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Alaska Science Center
Description:
6 p.
Larger Work Type:
Report
Larger Work Subtype:
Federal Government Series
Larger Work Title:
Arctic Refuge coastal plain terrestrial wildlife research summaries (Biological Science Report USGS/BRD/BSR-2002-0001)
First page:
65
Last page:
70
Country:
Canada, United States
State:
Alaska, Northwest Territories, Yukon Territory
Other Geospatial:
Arctic Refuge Coastal Plain, Arctic National Wildlife Refuge