About the Authors

Claire A. Simeone

Claire.Simeone@noaa.gov

Affiliations The Marine Mammal Center, Sausalito, California, United States of America, Office of Protected Resources, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Silver Spring, Maryland, United States of America

Frances M. D. Gulland

Contributed equally to this work with: Frances M. D. Gulland, Tenaya Norris, Teresa K. Rowles

Affiliation The Marine Mammal Center, Sausalito, California, United States of America

Tenaya Norris

Contributed equally to this work with: Frances M. D. Gulland, Tenaya Norris, Teresa K. Rowles

Affiliation The Marine Mammal Center, Sausalito, California, United States of America

Teresa K. Rowles

Contributed equally to this work with: Frances M. D. Gulland, Tenaya Norris, Teresa K. Rowles

Affiliation Office of Protected Resources, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Silver Spring, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CAS FMDG TN TKR. Performed the experiments: CAS. Analyzed the data: CAS FMDG TN. Contributed reagents/materials/analysis tools: CAS FMDG TN TKR. Wrote the paper: CAS FMDG TN TKR.