About the Authors

Cristina M. Gomes

gomes@eva.mpg.de

Affiliation Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany

Christophe Boesch

Affiliation Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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