1. Marine Mammals Management, US Fish and Wildlife Service, Anchorage, AK 99503, USA
2. Polar Science Center, Applied Physics Laboratory, University of Washington, Seattle, WA 98105, USA
3. Department of Ecology and Evolution, Stony Brook University, Stony Brook, NY 11794, USA
4. Polar Bears International, Bozeman, MT 59772, USA
5. Alaska Science Center, US Geological Survey, Anchorage, AK 99508, USA
6. Environment and Climate Change Canada, Edmonton, Alberta, Canada T6G 2E9
7. Ontario Ministry of Natural Resources and Forestry, Peterborough, Ontario, Canada K9J 7B8
8. Faculty of Environmental Studies, York University, Toronto, Ontario, Canada M3J 1P3
9. Natural History Museum, University of Oslo, Oslo 0318, Norway