About the Authors

Charlotte K. Hemelrijk

C.K.Hemelrijk@rug.nl

Affiliation Theoretical Biology, Centre for Ecological and Evolutionary Studies, University of Groningen, Haren, The Netherlands

Jan Wantia

Affiliation Department of Informatics, University of Zurich, Zurich, Switzerland

Karin Isler

Affiliation Anthropological Institute & Museum, University of Zurich, Zurich, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CKH. Performed the experiments: JW. Analyzed the data: JW KI. Contributed reagents/materials/analysis tools: CKH. Wrote the paper: CKH.