1. Center
for Conservation Biology, Department of Biology, University of Washington, Seattle, Washington 98195, United States
2. Northwest
Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Seattle, Washington 98112, United States
3. Alaska
Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Seattle, Washington 98115, United States
4. Center for Whale Research, Friday Harbor, Washington 98250, United States