Mortality of fish fry as a result of specific and aspecific cercarial invasion under experimental conditions
1999
Majoros, G.
Although the effect exerted on fish by fluke cercariae developing in fish as intermediate hosts is fairly well known, cercariae of flukes requiring intermediate hosts other than fish occur in fidh ponds in much higher numbers. To study the effect of these latter cercariae on fish fry, a few days old common carp fry (Cyprinus carpio) were exposed to cohorts of xiphidiocercariae or echinocercariae shed by one or two snails acting as intermediate hosts. The observed pathogenicity of these cercariae was compared to the well-known pathogenic effect of Diplostomum cercariae. Although Diplostomum cercariae proved to be the most pathogenic, occasionally also the other two types of cercariae could kill the common carp fry by invading their body.
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