Preliminary survey of the parasite fauna of some important fish species in the Upper-Reservoir of the Kis-Balaton System

Székely, Csaba and Molnár, Kálmán (1997) Preliminary survey of the parasite fauna of some important fish species in the Upper-Reservoir of the Kis-Balaton System. Parasitologia Hungarica, 29-30. pp. 45-54. ISSN 0303-688X

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Abstract

Parasitic infections of a total of 100 speciemns of 13 fish species inhabiting the Upper-Reservoir (Hídvégi Lake) of Kis-Balaton were surveyed in the first year of a four-year project. During the survey, which involved five samplings in the season that lasted from spring to autumn, 36 parasites were identified to the species while 14 others to the genus level. The commonest parasite of Kis-Balaton is Diplostomum spathaceum s. l. which causes infection of high prevalence but low intensity in many fish species. It is interesting that, despite the abundance of birds acting as definitive hosts, many of the helminth parasites common in Lake Balaton are absent from Kis-Balaton, probably because of the lack of intermediate hosts or due to differences in other ecological factors. Of the parasites found, 45 species are reported for the first time from Kis-Balaton.

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