1. Vertebrate Ecology Lab; Moss Landing Marine Laboratories; 8272 Moss Landing Road Moss Landing California 95039 U.S.A
2. University of California, Santa Cruz; 1156 High Street Santa Cruz California 95064 U.S.A
3. California Academy of Sciences; 55 Music Concourse Drive San Francisco California 94118 U.S.A
4. Wild Nature Institute; PO Box 165 Hanover New Hampshire 03755 U.S.A
5. Pacific Coast Science and Learning Center; Point Reyes National Seashore; 1 Bear Valley Road Point Reyes Station California 94956 U.S.A
6. National Park Service; Californian Cooperative Ecosystem Studies Unit; 133 Mulford Hall, University of California Berkeley; Berkeley California 94720 U.S.A
7. Marine Mammal and Turtle Division; Southwest Fisheries Science Center; National Marine Fisheries Service; National Oceanic and Atmospheric Administration; 8901 La Jolla Shores Drive La Jolla California 92037 U.S.A