HOME RANGES AND MOVEMENTS OF ARCTIC FOX (ALOPEX-LAGOPUS) IN WESTERN ALASKA

During the period from 1985 to 1990, radio collars were attached to 61 arctic foxes (Alopex lagopus) in the coastal region of the Yukon-Kusk okwim Delta in western Alaska. Radio tracking using hand-held receiver s from aircraft and from fixed towers was conducted to determine daily and seasonal movements of foxes. Intensive radio tracking of 18 foxes from May through July indicated that males used larger areas ((x) ove r bar = 10.22 +/- 6.18 km(2)) than females ((x) over bar = 4.57 +/- 1. 94 km(2)) regardless of breeding status. Generally foxes were relocate d near ((x) over bar = 3.4 +/- 2.4 km) their summer home ranges during other seasons of the year. There were no complex social groups of fox es among the marked population. Foxes did not have a definitive prefer ence for any plant community, probably because of the even distributio n and abundance of prey throughout all communities. Thirty foxes were relocated repeatedly during a period of at least 10 months, which incl uded the denning season of one year and the breeding season of the nex t. Of 24 confirmed deaths of collared foxes, 16 were caused by shootin g or trapping by local residents and 8 had unidentified causes. Maximu m distance moved between relocations was 48.4 km. Males moved farther from initial capture sites in the winter following capture than did fe males, largely because of greater than 20 km movements by two foxes. T here were no seasonal differences in movements between males and femal es.