About the Authors
- Cornelia Schrauf
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* E-mail: connyschrauf@chello.at
Affiliation Department of Behavioural Biology, University of Vienna, Vienna, Austria
- Josep Call
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Affiliation Department for Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Koki Fuwa
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Affiliation Great Ape Research Institute, Hayashibara Biochemical Laboratories, Tamano, Okayama, Japan
- Satoshi Hirata
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Affiliation Great Ape Research Institute, Hayashibara Biochemical Laboratories, Tamano, Okayama, Japan
Competing Interests
Two authors are employed by Hayashibara Biochemical Laboratories, Inc. However, the company had no role in study design, consultancy, data collection and analysis, decision to publish, or preperation of the manuscript. The authors declare their full adherence to all PLOS One policies on data sharing and materials.
Author Contributions
Conceived and designed the experiments: CS JC SH. Performed the experiments: KF SH. Analyzed the data: CS JC. Contributed reagents/materials/analysis tools: JC SH. Wrote the paper: CS JC.