1. Polar Science Center Applied Physics Laboratory University of Washington Seattle Washington 98105USA
2. Wildlife Research Section Department of Environment Government of Nunavut P.O. Box 209 Igloolik Nunavut X0A 0L0 Canada
3. Greenland Institute of Natural Resources P.O. Box 570 3900 Nuuk Greenland
4. Natural History Museum University of Oslo P.O. Box 1172 Blindern N‐0318 Oslo Norway
5. Environment and Climate Change Canada CW‐422 Biological Sciences Building University of Alberta Edmonton Alberta T6G 2E9 Canada