1. Faculty of Fisheries and Protection of Waters; University of South Bohemia in Ceske Budejovice; South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses; Research Institute of Fish Culture and Hydrobiology; Vodňany Czech Republic
2. Department of Lake and River Fisheries; Warmia and Mazury University; Olsztyn Poland
3. DTU Aqua-National Institute of Aquatic Resources; Section for Marine Ecology and Oceanography; Technical University of Denmark; Charlottenlund Denmark