The influence of biotic factors on heart contractions rhythm in lamellibranchia mollusks (Bivalvia, Unioninae, Anodontinae)

A. Stadnychenko, V. Gyrin

Ivan Franko State University of Zhytomyr
40, Velyka Berdychivska St., Zhytomyr 10008, Ukraine
stadnychenko@yandex.ru

Peculiarities of “gill pregnancy”, Rhodeus amarus larvae and trematodes influence on heart rhythms in Unio pictorum, U. tumidus, Anodonta cygnea are researched. In favourable environment female gill pregnancy doesn’t change heart rhythms. These mollusks gills invasion with Rhodeus amarus larvae and the destruction of their gonads with trematodes cause changes in heart rhythms the character and låvel of which depend on Rhodeus amarus larvae and parasites quantity per one specimen of their hosts.


Keywords: Unio, Anodonta, “gill pregnancy”, Rhodeus amarus larvae, trematodes, heart contractions frequency


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