[The reproductive structure of groupings of the parasitic nematode Camallanus truncatus and the factors determining its alteration].

The reproductive structure of the nematode Camallanus truncatus in the population of the perch Perca fluviatilis in dependence upon host's size and seasons was studied. It is recovered, that only the bigger sized host groups influence the formation of reproductive-functional structure of the C. truncatus hemipopulation.