Abstract
AbstractReproduction and shell growth in two snail species from the family Clausiliidae differing in reproductive strategies were examined under laboratory conditions. The specimens of the oviparous species Clausilia bidentata and the ovoviviparous species Ruthenica filograna were collected in natural populations coexisting in the same area. The total time of shell growth in the specimens of C. bidentata ranged from 77 to 178 days and in R. filograna specimens ranged between 108 and 194 days. Under breeding conditions the species differed in the timing of reproduction and mortality. However the proportion of the number of surviving specimens to the number of eggs laid by C. bidentata or juveniles born by R. filograna proved to be similar.
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