About the Authors

Janos C. Hennicke

janos.hennicke@uni-hamburg.de

Affiliations Marine Top Predator Group, Centre d’Etudes Biologiques de Chizé, CEBC–CNRS, Villiers-en-Bois, France, Department of Ecology and Conservation, University of Hamburg, Hamburg, Germany

David J. James

Affiliation 73 Pozieres Ave, Milperra, New South Wales, Australia

Henri Weimerskirch

Affiliation Marine Top Predator Group, Centre d’Etudes Biologiques de Chizé, CEBC–CNRS, Villiers-en-Bois, France

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JCH DJJ HW. Performed the experiments: JCH DJJ. Analyzed the data: JCH HW. Contributed reagents/materials/analysis tools: JCH DJJ HW. Wrote the paper: JCH DJJ HW.