Home – Home – Jornals – Contemporary Problems of Ecology 2015 number 2

Composition of helminths and infestation indexes of two species of frogs living in Western Siberia — Ranа arvalis (n = 1082) и Ranа amurensis (n = 33) — were studied. Nine helminth species, including four species of nematodes, and five species of trematodes, were found. Nematodes Rhabdias bufonis, Oswaldocruzia filiformis, Cosmocerca ornаta and trematodes Haplometra cylindracea dominated and infected both species of frogs. The moor frog also hosted Dolichosaccus rastellus, Opisthioglyphe ranаe, Pharingostomum cordatum (larvae), Parastrigea robusta (larvae) and Neyraplectana schneideri. The moor frog had higher helminth species richness and diversity compared with the Siberian tree frog. The overall rates of helminth infestation were the same in the moor frog and the Siberian tree frog. The invasion extensity was 85-100 %; the index of abundance was 5.2–27.5. The differences in infestation rates with certain species of helminths were due to the peculiarities of biology of the frog species.