[1] Univ Calif Santa Cruz, Dept Ocean Sci, Santa Cruz, CA 95064 USA
[2] Marine Conservat Inst, Glen Ellen, CA 95442 USA
[3] Stanford Univ, Hopkins Marine Stn, Dept Biol, Pacific Grove, CA 93950 USA
[4] Stanford Univ, Ctr Ocean Solut, Monterey, CA 93940 USA
[5] NOAA, Div Environm Res, SW Fisheries Sci Ctr, Pacific Grove, CA 93950 USA
[6] Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA
[7] Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA
[8] Univ London Imperial Coll Sci Technol & Med, Ascot SL5 7PY, Berks, England
[9] Harvard Forest, Petersham, MA 01366 USA
[10] Univ Calif Santa Cruz, Ctr Integrated Spatial Res, Santa Cruz, CA 95064 USA
[11] Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95064 USA
[12] NOAA, Protected Resources Div, SW Fisheries Sci Ctr, Natl Marine Fisheries Serv, Moss Landing, CA 95039 USA
[13] NOAA, Protected Resources Div, SW Fisheries Sci Ctr, Natl Marine Fisheries Serv, La Jolla, CA 92037 USA
[14] Univ Maryland, Ctr Environm Sci, Chesapeake Biol Lab, Solomons, MD 20688 USA
[15] NOAA, Natl Marine Mammal Lab, Alaska Fisheries Sci Ctr, Natl Marine Fisheries Serv, Seattle, WA 98115 USA
[16] Off Naval Res, Arlington, VA 22203 USA
[17] Oregon State Univ, Hatfield Marine Sci Ctr, Marine Mammal Inst, Newport, OR 97365 USA
[18] San Jose State Univ, Dept Biol Sci, San Jose, CA 95192 USA
[19] Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biotechnol & Biomed, La Jolla, CA 92093 USA