1. Biology Centre of the Czech Academy of Sciences, Institute of Hydrobiology, Na Sádkách 7, 370 05 České Budějovice, CZ, Czech Republic
2. Faculty of Sciences, University of South Bohemia, Branišovská 1645/31A, 370 059 České Budějovice, CZ, Czech Republic
3. Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zátiší 728/II, Vodňany, 389 25 České Budějovice, CZ, Czech Republic