About the Authors

T. K. Zeppelin

Tonya.Zeppelin@noaa.gov

Affiliation National Marine Mammal Laboratory (NMML), Alaska Fisheries Science Center (AFSC), National Oceanic and Atmospheric Administration, Seattle, Washington, United States of America

D. S. Johnson

Affiliation National Marine Mammal Laboratory (NMML), Alaska Fisheries Science Center (AFSC), National Oceanic and Atmospheric Administration, Seattle, Washington, United States of America

C. E. Kuhn

Affiliation National Marine Mammal Laboratory (NMML), Alaska Fisheries Science Center (AFSC), National Oceanic and Atmospheric Administration, Seattle, Washington, United States of America

S. J. Iverson

Affiliation Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada

R. R. Ream

Affiliation National Marine Mammal Laboratory (NMML), Alaska Fisheries Science Center (AFSC), National Oceanic and Atmospheric Administration, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TZ RR. Performed the experiments: TZ RR SI CK. Analyzed the data: DJ TZ. Wrote the paper: TZ.