Potential for host - switch in Gyrodactylus proterorhini in the area of introduction
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|Fakulta / Pracoviště MU
|During host introductions into new environments, non native species may transport new parasite species that can invade native host populations. Recently, five Ponto Caspian goby fish species started to expand their home range and invaded various water systems in Europe and North America.Gyrodactylus proterorhini, a monogenean parasite infecting several goby species in their native range, has been introduced together with its hosts to the new areas in Europe, showing high abundances in some fish host populations.In this study, we investigated host specificity of G. proterorhini in both the natural and experimental conditions.Out of the four samplings of gobies and related(ecologically or phylogenetically) fish species, host switch was observed only in one sample, the Wloclawek Reservoir (Poland). The accidental occurrence of G. proterorhini was found in native perch Perca fluviatilis and non native Amur sleeper Perccottus glenii, a fish species introduced from the different region than gobies. In experimental conditions, none of the parasite was found to switch from tubenose goby (Proterorhinus semilunaris) to perch or sander (Sander lucioperca), in both the case of exposition to natural host switch during sharing the same aquaria or in the case of artificial transfer of live worm to particular fish species.Our results show extremely low potential for host switch of introduced parasite G. proterorhini, at least in the region of freshwaters in the Central and Western Europe.