1. Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses University of South Bohemia in Ceske Budejovice Vodňany Czech Republic
2. Departamento de Biología Animal, Edafología y Geología Universidad de La Laguna La Laguna Spain
3. Institute of Parasitology Biology Centre of the Czech Academy of Sciences České Budéjovice Czech Republic