Experience of Studying the Growth Rate of Freshwater Gastropoda of the Bithyniidae Family on the Basis of Shells
The Bithyniidae molluscs (Gastropoda, Prosobranchia) of 29 populations (14 014 individuals) from Western Siberia were investigated. The guidelines for studying the growth rate of the Gastropoda shells were proposed. The data on the effect of abiotic and biotic factors on the Gastropoda growth rate were anаlyzed. The influence of trematodes in the parthenita stage on the shell growth rate for <i>Bithynia troscheli</i> (Paasch, 1842) was investigated.