1. Faculty of Fisheries and Protection of Waters University of South Bohemia Vodňany Czech Republic
2. Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, Faculty of Veterinary Hygiene and Ecology University of Veterinary Sciences Brno Brno Czech Republic
3. Department of Zoology, Fisheries, Hydrobiology and Apiculture, Faculty of AgriSciences Mendel University in Brno Brno Czech Republic
4. Institute of Parasitology Biology Centre of the Czech Academy of Sciences České Budějovice Czech Republic