About the Authors
- Brian K. Branstetter, Sam H. Ridgway
- National Marine Mammal Foundation, San Diego, California, United States of America
- James J. Finneran, Brian C. Weisman
- U.S. Navy Marine Mammal Program, Space and Naval Warfare Systems Center Pacific, San Diego, California, United States of America
- Elizabeth A. Fletcher
- Maritime Services Division, Science Applications International Corporation, San Diego, California, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: BKB JJF SHR. Performed the experiments: BKB EAF BCW. Analyzed the data: BKB. Contributed reagents/materials/analysis tools: BKB JJF. Wrote the paper: BKB JJF SHR. Animal training: EAF BCW. Hardware development: JJF. Software development: BKB JJF.