1. University of California, Santa Cruz, affiliated with Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 110 McAllister Way, Santa Cruz, CA 95060, USA.
2. University of California, Santa Cruz, Institute of Marine Sciences, 1156 High Street, Santa Cruz, CA 95064, USA.
3. Fisheries Ecology Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 110 McAllister Way, Santa Cruz, CA 95060, USA.