DETECTION OF POSTHODIPLOSTOMUM CUTICOLA (NORDMANN, 1832) IN FISH IN THE WATER BODIES OF THE NOVOSIBIRSK REGION

The article presents data on infection of fish of the cyprinid family (ide, dace, roach) with metacercariae of trematode Posthodiplostomum cuticola. Fish for the study were caught in the following water bodies of the Novosibirsk Region: the Chulym, Karakan, Inya, and Makhalikha Rivers, as well as from the left (Sharapovsky Bay) and right (Tulkinsky Bay) banks of the Novosibirsk Reservoir. Fish were studied by the compressor method generally accepted in parasitology and by partial helminthological dissection. A total of 270 fish specimens (71 ides, 82 daces, and 117 roaches) were studied. To analyze the fish infection, such indicators as the invasion prevalence and intensity, as well as the abundance index were used. The research results showed that the overall level of infection of cyprinids with P. cuticola metacercariae in the reservoirs of the Novosibirsk Region was 13.0%. The highest invasion prevalence of 35.2% was observed in ides; in daces and roaches this value is much lower and amounts to 7.3% and 3.4%, respectively. The invasion intensity was low, ranging from 1 to 7 parasite specimens per fish. The highest average invasion intensity of 3.3 and 3.1 specimens was recorded in daces from the Karakan River and ides from the Chulym River.