About the Authors
- Annette Kohnen
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* E-mail: annettekohnen@gmx.de
Affiliation Department of Animal Ecology, Philipps-Universität Marburg, Marburg, Germany
- Iris Richter
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Affiliation Department of Animal Ecology, Philipps-Universität Marburg, Marburg, Germany
- Roland Brandl
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Affiliation Department of Animal Ecology, Philipps-Universität Marburg, Marburg, Germany
Competing Interests
A.K. received a scholarship of the FAZIT-Stiftung for one year during her PhD. The only interest of this founder is to help poor students without salary. The only condition of the scholarship was to finish the PhD-work. 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: AK RB. Performed the experiments: AK IR. Analyzed the data: AK. Wrote the paper: AK RB.