1. Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno 611 37, Czech Republic
2. Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, Brno 613 00, Czech Republic
3. Department of Biology, Faculty of Education, Masaryk University, Poříčí 7, Brno 603 00, Czech Republic
4. Division of Animal Physiology, Department of Biology, Faculty of Science, University of Zagreb, Horvatovac 102a, Zagreb 10000, Croatia