Affiliation: | 1. Marine Mammal & Turtle Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, La Jolla, California, U.S.A;2. Bio‐waves, Inc., Encinitas, California, U.S.A;3. Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, U.S.A |