Infection of unionids (Bivalvia: Unionidae) of Ukraine by trematodes Rhipidocotyle illense Ziegler, 1883
L. Yanovych*, M. Pampura
Ivan Franko Zhytomyr State University
40, V. Berdychivska St., Zhytomyr 10008, Ukraine
One type of trematodes parasitizes in unionids from Ukrainian populations – Rhipidocotyle ³llense Ziegler, 1883. Among investigated 129 points within the limits of all river pools of Ukraine of the mollusks with trematodes were educed in 27 cases. The greatest value of extensiveness of invasion is characteristic for Anodonta anatinà Linnaeus, 1758 (9,5%). The Unio crassus Philipsson, 1788, A. cygnea Linnaeus, 1758, Pseudanodonta complanata Rossmaessler, 1835 and Sinanodonta woodiana Lea, 1834 were free from trematodes. An increase of extensiveness of invasion of unionids in reservoirs and water streams of Ukraine is marked, that, probably, is the consequence of creation of pools on water streams and decline of closeness of settlement of unionids through general degradation of malacocenosis.
Keywords: extensiveness of invasion, intensity of invasion, river pools of Ukraine