Slovak section of the Danube has its well-established breeding ground of marbled crayfish Procambarus fallax f. virginalis
Established populations of the non-indigenous parthenogenetically reproducing marbled crayfish Procambarus fallax f.virginalis have been recently reported from various European countries.The colonised sites are usually lentic and relatively isolated from major watercourses and in such cases the immediate threat of the spread of this taxon is limite