1. University of Veterinary Sciences Brno, Faculty of Veterinary Hygiene and Ecology, Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, Brno, Czech Republic; e-mail: , H22257@vfu.cz, piacekv@vfu.cz, pikulaj@vfu.cz, balazv@vfu.cz
2. Palacký University Olomouc, Faculty of Science, Department of Zoology, Olomouc, Czech Republic; e-mail: , vojtech.balaz@upol.cz
3. Comenius University in Bratislava, Faculty of Natural Sciences, Department of Zoology, Bratislava, Slovak Republic; e-mail: , folk2@uniba.sk