1. Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic; e-mail: , zukalova@ivb.cz
2. Department of Botany and Zoology, Masaryk University, Brno, Czech Republic; e-mail:
3. Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary Sciences Brno, Brno, Czech Republic; e-mail: , seidlovav@vfu.cz