1. Department of Zoology; Faculty of Science; University of South Bohemia; České Budějovice Czech Republic
2. Department of Biogeography; Trier University; Trier Germany
3. Senckenberg Research Institute and Natural History Museum Frankfurt; Frankfurt am Main Germany
4. Department of Animal Science and Ethology; Faculty of Agrobiology, Food and Natural Resources; Czech University of Life Science Prague; Prague Czech Republic
5. Zoological Garden Prague; Prague Czech Republic
6. Burgers' Zoo; Arnhem The Netherlands