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Title: Migration behavior of pronghorn in southeastern Idaho

Fifty-four pronghorn (Antilocapra americana) were radio-collared out of 232 captured on 3 winter ranges in southeastern Idaho. Radioed pronghorn were followed for up to 21 months each, from December 1975 through August 1977. Winter home ranges showed a difference (P < 0.005) in size among valleys the 1st winter and were different in size and location within valleys between years. Snow covered the ground 1 week earlier and lasted 3 weeks longer in 1975 to 1976 than in 1976 to 1977. Spring migration began more than 1 month earlier in 1977 than 1976, and appeared related to loss of snow cover on the winter ranges in both years. Distances that pronghorn migrated in spring 1976 were different among valleys (P < 0.05) but directions were, in general, upward to areas near the heads of the valleys. Summer home ranges of all radioed pronghorn averaged 2033 +- 322 (SE) ha. Yearlings wandered during summer and their home ranges were 2 to 5 times as large as ranges of adults. Fall migration in 1976 began after 1 October and was not prompted by snowfall. Percent moisture in vegetation is suggested as a stimulus for onset of fall migration, and snowfall is suggestedmore » as a factor influencing distance migrated and location of winter.« less
Authors:
;
Publication Date:
OSTI Identifier:
6668400
DOE Contract Number:
AC02-76EV01332
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Wildl. Manage.; (United States); Journal Volume: 44:1
Research Org:
Univ. of Minnesota, St. Paul
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; ANTELOPES; MIGRATION; BEHAVIOR; CLIMATES; HOME RANGE; IDAHO; RADIO EQUIPMENT; RADIOWAVE RADIATION; SEASONS; STORMS; WEATHER; ANIMALS; DISASTERS; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; EQUIPMENT; MAMMALS; NORTH AMERICA; PACIFIC NORTHWEST REGION; RADIATIONS; RUMINANTS; USA; VERTEBRATES 550100* -- Behavioral Biology