Institution: | 1. University of Alaska Fairbanks, Institute of Arctic Biology, Department of Biology and Wildlife, , Fairbanks, Alaska, 99775 U.S.A;2. University of Washington, Department of Statistics, , Seattle, Washington, 98195 U.S.A;3. Department of Wildlife Management, North Slope Borough, , Barrow, Alaska, 99723 U.S.A;4. Scripps Institution of Oceanography, UCSD, , San Diego, California, 92093 U.S.A |