Seasonal dynamics and age structure of the hemipopulation of marits <i>Pleurogenes claviger </i>(Fasciolida, Pleurogenidae) in lake frog from Saratov reservoir
Peculiarities of the age structure and abundance dynamics of the hemipopulation of Pleurogenes claviger (Rud., 1819) are considered. In the host's active life period (May-October), the hemipopulation of P. claviger are presented by 2 generations, who have lived in the host less than one year and distinguish in ripening rate