1. Department of Agricultural, Food and Environmental Engineering, Faculty of Agronomy; Mendel University in Brno; Zemědělská 1 Brno 61300 Czech Republic
2. Department of Zoology, Fisheries, Hydrobiology and Apidology, Faculty of Agronomy; Mendel University in Brno; Zemědělská 1 Brno 61300 Czech Republic