About the Authors

Cyril Eraud

cyril.eraud@oncfs.gouv.fr

Affiliation Office National de la Chasse et de la Faune Sauvage, Villiers en Bois, France

Marcel Rivière

Affiliation Maisonneuve, Saint Pierre d’Oléron, France

Hervé Lormée

Affiliation Office National de la Chasse et de la Faune Sauvage, Villiers en Bois, France

James W. Fox

Affiliation Migrate Technology Ltd, Cambridge, United Kingdom

Jean-Jacques Ducamp

Affiliation Centre d’Etudes Biologiques de Chizé, CNRS-UPR 1934, Villiers en Bois, France

Jean-Marie Boutin

Affiliation Office National de la Chasse et de la Faune Sauvage, Villiers en Bois, France

Competing Interests

James Fox is a Director of Migrate Technology Ltd that sells geolocators that were not used in this study. Formerly, James Fox worked for British Antarctic Survey (BAS). BAS sold the geolocators used in this study but James Fox no longer has any affiliation or connection to that organisation and nor does Migrate Technology Ltd. Neither James Fox nor Migrate Technology Ltd currently receive any payments from BAS relating to BAS' intellectual property, nor are any future payments expected. Other than helping design and extract data from the geolocators used in this study, all James Fox's contributions to this manuscript were made while he had no affiliation with, and while he received no direct or indirect benefits from BAS. As for the policy regarding the sharing of data and materials, James Fox has no ownership of the data or materials presented here. Accordingly, this does not alter the authors‚ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JMB CE HL. Performed the experiments: MR JMB CE HL. Analyzed the data: CE JMB JWF. Contributed reagents/materials/analysis tools: JWF JJD. Wrote the paper: CE HL JMB JWF.