About the Authors

Helmut Schmitz

h.schmitz@uni-bonn.de

Affiliation Institut für Zoologie der Universität Bonn, Bonn, Germany

Herbert Bousack

Affiliation Peter Grünberg Institut, Forschungszentrum Jülich GmbH, Jülich, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HB HS. Wrote the paper: HB HS. Retrieved data and information: HB HS. Performed the modelling: HB.