About the Authors

Somanath Bhat

Somanath.Bhat@measurement.gov.au

Affiliation National Measurement Institute, Lindfield, New South Wales, Australia

Andrea M. Polanowski

Affiliation Autralian Marine Mammal Centre, Australian Antarctic Division, Kingston, Tasmania, Australia

Mike C. Double

Affiliation Autralian Marine Mammal Centre, Australian Antarctic Division, Kingston, Tasmania, Australia

Simon N. Jarman

Affiliation Autralian Marine Mammal Centre, Australian Antarctic Division, Kingston, Tasmania, Australia

Kerry R. Emslie

Affiliation National Measurement Institute, Lindfield, New South Wales, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SB ANP KRE. Performed the experiments: SB. Analyzed the data: SB ANP KRE. Contributed reagents/materials/analysis tools: SB ANP MCD SNJ KRE. Wrote the paper: SB KRE.