[Seasonal variations of the localization of the Bunodera luciopercae marites (Trematoda: Bunoderidae) in three species of perch fishes].
Distribution of Bunodera luciopercae marites in the intestine of the fuff, sande and perch were studied in the Rybinsk Reservoir. For the fuff and perch fry, except three summer months, the more proportion of helminths was observed in the posterior region of the intestine. Because of a continuous passage of B. luciopercae in predatory fishes (sanders and adult perches), more proportion of trematodes was always observed in anterior region of the intestine. In all groups of hosts, 20-30% of total parasite number was registered in the middle intestine.