Dr. Kassai Tibor szerk.: Parasitologia Hungarica 2. (Budapest, 1969)

Material and Methods Our investigations were conducted on fish collected in various waters in Hungary (Lake Balaton., Lake Yelence, the Rivers Danube, Tisza, several smaller rivers, and fish ponds). In the majority of cases, the specimens were examined by complete parasitological dissection; in other cases, mainly when specimens were not recently killed fish,examination of the body surface was omitted. If only a few crustaceans were found to occur on the given specimens, a complete collection was made; in the case of a great number of parasites only 20-30 specimens were gathered and identified. Crustacean parasites were found on 26 fish species (Table l). Of the fish species which have been found to be free of parasitic Crustacea, we mention only those of which at least 20 have been dissected.. • These are as follows: Leuciscus leuciscus, Leucaspius delineatus, Gobio albipinnatus

, Barbus barbus, Barbus meridionalis Petényi, Alburnoides bipunctatus, Abramis sapa, Nemachilus barbatulus. The specific identification of the parasites collected from the fish was made after their preservation in alcohol. Of the collected Crustacea, we propose to discuss only the copepodan parasites. Results Eleven parasitic copepods were found; ten of these were found on domestic fish species, and one on a recently imported species, not yet introduced to domestic waters. The species demonstrated are as follows: