1. National Marine Mammal Foundation; 2240 Shelter Island Drive, Suite 200 San Diego California 92106 U.S.A
2. Marine Mammal and Turtle Division; Southwest Fisheries Science Center, National Marine Fisheries Service, NOAA; 8901 La Jolla Shores Drive La Jolla California 92037 U.S.A
3. Department of Biology; Sonoma State University; 1801 East Cotati Avenue Rohnert Park California 94928 U.S.A
4. Center for Conservation Biology; Box 351800, University of Washington; Seattle Washington 98195 U.S.A
5. Ocean Associates, Inc.; 4007 North Abingdon Street Arlington Virginia 22207 U.S.A