FISH INFECTIONS BY TREMATODES OF THE GENUS POSTHODIPLOSTOMUM IN THE SOUTHERN REGIONS OF THE TOMSK REGION

Infection of the fish with trematode metacercariae of the genus Posthodiplostomum in rivers in the southern regions of the Tomsk region are presented. In this study it was shown that the abundance trematode metacercariae of the genus Posthodiplostomum is statistically significantly higher in fish in the Ob river in comparison with the Tom river. The assumption is put forward that the appearance of this parasite on the territory of the Tomsk Region is associated with the expansion to the north of the area of the gray heron Area cinereal, which is the final host of trematodes of the genus Posthodiplostomum.