1 Gulf of California Marine Program, Center for Marine Biodiversity and Conservation, Marine Biology Research Division, The Scripps Institution of Oceanography, La Jolla, San Diego CA 92093-0205, USA. afjohnson@ucsd.edu.
2 Department of Geography and Environment, Romberg Tiburon Center for Environmental Studies, San Francisco State University, Tiburon, CA 94920, USA.
3 National Audubon Society, San Francisco, CA 94104, USA.
4 Institute of Biodiversity and Environmental Conservation, University Malaysia Sarawak, Sarawak, Malaysia.
5 Department of Marine and Coastal Resources, Eastern Marine and Coastal Resources Research Center, Rayong, Thailand.
6 Vietnam Marine Mammal Network and The School of Ocean Sciences, Bangor University, Anglesey, LL59 5AB, UK.
7 Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur, Malaysia.
8 The MareCet Research Organization, Shah Alam, Malaysia.
9 San Diego State University, San Diego, CA 92182, USA.