About the Authors

Philip N. Trathan, Peter T. Fretwell
British Antarctic Survey, Cambridge, United Kingdom

Bernard Stonehouse
Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom

Corresponding Author


Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PNT PTF BS. Performed the experiments: PNT PTF BS. Analyzed the data: PNT PTF BS. Contributed reagents/materials/analysis tools: PNT PTF BS. Wrote the paper: PNT PTF BS.