1. Faculty of Fishery and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses; University of South Bohemia in České Budějovice; Zátiší 728/II, 389 25 Vodňany Czech Republic
2. Faculty of Agriculture, University of South Bohemia in České Budějovice; Studentská 13, 370 05 České Budějovice; Czech Republic
3. Biology Centre of the AS CR, v.v.i., Institute of Hydrobiology; Na Sádkách 7, 370 05 České Budějovice; Czech Republic
4. T. G. Masaryk Water Research Institute; Department of Aquatic Ecology; Podbabská 2582/30, 160 00 Prague Czech Republic