Study of helminth fauna in the Bolotnaya River and floodplain lake near the Solovey-Klyuch village (Nadezhdinsky District, Primorsky Region). K.S. VAINUTIS, A.N. VORONOVA

Abstract

Study of helminth fauna in the Bolotnaya River and floodplain lake near the Solovey-Klyuch village (Nadezhdinsky District, Primorsky Region). K.S. VAINUTIS, A.N. VORONOVA (Federal Scientific Center of the East Asia Terrestrial Biodiversity, FEB RAS, Vladivostok).

We have studied helminth fauna of anuran amphibians and fish from the Bolotnaya River flowing into the floodplain lake located close to the Solovey-Klyuch village in the Nadezhdinsky District (Primorsky Region, Russia). Using the method of complete helminthological autopsy examined ones are 9 species of aquatic animals (95 specimens), among which only 4 species were infected with following helminths: Chinese sleeper Perccottus glenii Dybowski, 1877; Amur minnow Rhynchocypris lagowskii (Dybowski, 1869); stone loach Barbatula toni (Dybowski, 1869); Dybowski’s frog Rana dybowskii Günther, 1876. We recorded 6 species of parasitic worms: Trematoda – Azygia hwangtsiyui Tsin, 1933, Phyllodistomum sp. (metacercariae and adult individuals); Nematoda – Cosmocerca sp., Oswaldocruzia filiformis (Goeze, 1782), Rhabdias bufonis (Schrank, 1788) Stiles et Hassall, 1905; Cestoda – Proteocephalus sp. Prevalence and intensity of infestation were estimated for the helminths mentioned above: the highest percentage of occurrence was noted for the trematode species Azygia hwangtsiyui in the stomach of P. glenii, nematodes Cosmocerca sp. and O. filiformis in the stomach and intestine of R. dybowskii, and cestodes Proteocephalus sp. in the stomach and intestine of R. dybowskii. Given that this well-warmed, eutrified pond, comprising a large number of mollusks, has not been studied previously, a thorough study does not exclude the finding of the dangerous species for humans.