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Predators

Biological Science Report 2002-0001- 6
By: , and 
Edited by: David C. DouglasPatricia E. Reynolds, and E.B. Rhode

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Abstract

Calving caribou (Rangifer tarandus) of the Central Arctic herd, Alaska, have avoided the infrastructure associated with the complex of petroleum development areas from Prudhoe Bay to Kuparuk (Cameron et al. 1992, Nellemann and Cameron 1998, and Section 4 of this document). Calving females of the Porcupine caribou herd may similarly avoid any oil field roads and pipelines developed in areas traditionally used during the calving and post-calving periods. This may displace the caribou females and calves to areas east and south of the 1002 Area of the Arctic National Wildlife Refuge.

Increased calf mortality could occur if calving caribou are displaced into areas that have a higher density of predators, higher rates of predation, or where a higher proportion of the predators regularly use caribou as a food source (Whitten et al. 1992).

Our study assessed predation risks to caribou calving in the 1002 Area versus calving in potential displacement areas. Due to funding constraints, our research focused on grizzly bears (Ursus arctos), with wolves (Camus lupus) and golden eagles (Aquila chrysaetos) receiving only cursory attention. Our research objectives were 1) to compare relative abundance of predators within the 1002 Area with that in adjacent peripheral areas, 2) to determine factors affecting predator abundance on the calving grounds, and 3) to quantify the use of caribou as a food source for predators and the importance of caribou to the productivity of predator populations using the coastal plain of the Arctic National Wildlife Refuge.

Study Area

Additional publication details

Publication type Report
Publication Subtype Federal Government Series
Title Predators
Series title Biological Science Report
Series number 2002-0001
Chapter 6
Year Published 2002
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Alaska Science Center
Description 4 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 51
Last page 53
Country Canada, United States
State Alaska, Northwest Territories, Yukon Territory
Other Geospatial Arctic Refuge Coastal Plain, Arctic National Wildlife Refuge