1. Hopkins Marine Station of Stanford University; 120 Oceanview Boulevard Pacific Grove California 93950 USA
2. Department of Ecology; Montana State University; PO Box 173460 Bozeman Montana 59717 USA
3. Department of Ecosystem Science and Management; Pennsylvania State University; University Park Pennsylvania 16802 USA
4. Monterey Bay Aquarium; 886 Cannery Row Monterey California 93940 USA
5. Point Reyes National Seashore; Inverness California 94937 USA