1. Institute of Vertebrate Biology Academy of Sciences of the Czech Republic Brno Czech Republic
2. Department of Ecology and Vertebrate Zoology University of Łódź Łódź Poland
3. Department of Botany and Zoology Faculty of Science Masaryk University Brno Czech Republic
4. Department of Zoology Faculty of Science Charles University Prague Czech Republic
5. Institute of Ecology and Evolution University of Bern Bern Switzerland
6. Department of Fish Ecology and Evolution Centre of Ecology, Evolution and Biogeochemistry EAWAG Swiss Federal Institute of Aquatic Science and Technology Kastanienbaum Switzerland