Zooplankton of some water bodies of the Zoological Garden in Kraków.

The aim of this study was to register the zooplanktonic organisms in water bodies in the Zoological Garden in Kraków, especially from a point of view of the occurrence of species of the Paramecium aurelia complex. Only P. caudatum was found in one habitat, in several sampling places. The species seems very resistant and can survive in poor or polluted habitats in which the P. aurelia ssp. are eliminated.