[Professor Wincenty Wiśniewski's complex experiments about circulation of parasites in the ecosystem of Lake Druzno as a model for activities of the Ichtyoparasitological Section of the Student Scientific Association at the University of Gdańsk].

Druzno Lake is hypertrophic basin located on Zuławy polders (delta of Vistula). Due to the high number of free-living and parasitic species, this lake is unique place for parasitological research. Professor Wisniewski valued Druzno Lake as great area for studying the parasitic species life-cycles. He and his research team lead intensive studies on parasites' circulation in environment. Models compiled by prof. Wisniewski are basal for work of Ichtyoparasitological Section of Student Scientific Association at University of Gdańsk.