1. Marine Physical Laboratory, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093-0238, USA
2. Hawaiian Islands Humpback Whale National Marine Sanctuary, 726 S. Kihei Rd, Kihei, Hawaii 96753, USA
3. Greeneridge Sciences, Inc., 5266 Hollister Avenue, Suite 107, Santa Barbara, California 93111, USA