1. U.S. Geological Survey, California Cooperative Fish and Wildlife Research Unit Humboldt State University 1 Harpst Street Arcata California 95521 USA
2. California Cooperative Fish and Wildlife Research Unit Humboldt State University 1 Harpst Street Arcata California 95521 USA
3. National Oceanic and Atmospheric Administration, Southwest Fisheries Science Center Fisheries Ecology Division 110 Shaffer Road Santa Cruz California 95060 USA
4. Department of Ocean Sciences University of California, Santa Cruz 1156 High Street Santa Cruz California 95064 USA
5. National Oceanic and Atmospheric Administration, Northwest Fisheries Science Center Newport Research Station 2032 SE OSU Drive Newport Oregon 97365 USA