About the Authors

Claire Gaillard

Affiliation Muséum National d'Histoire Naturelle, Paris, France

François Strauss

strauss@mnhn.fr

Affiliation Muséum National d'Histoire Naturelle, Paris, France

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CG FS. Performed the experiments: CG FS. Analyzed the data: CG FS. Contributed reagents/materials/analysis tools: CG FS. Wrote the paper: FS.