1. Faculty of Fisheries and Protection of Waters; South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses; Research Institute of Fish Culture and Hydrobiology; University of South Bohemia in Ceske Budejovice; Vodnany Czech Republic
2. Department of Ichthyology; Warmia and Mazury University in Olsztyn; Olsztyn Poland
3. Department of Lake & River Fisheries; Faculty of Environmental Sciences & Fisheries; University of Warmia & Mazury in Olsztyn; Olsztyn Poland