Analysis of the reproductive structure of the hemipopulation of the Cosmocerca ornata (Dujardin, 1845) (Nematoda: Cosmocercidae) in marsh frogs of different ages

Abstract

The reproductive structure of the hemipopulation of the Cosmocerca ornata (Dujardin, 1845) in different age groups of the marsh frog has been studied. It is established that the main role in the formation of the reproductive structure of the hemipopulation and maintenance of C. ornata abundance belongs to 2- and 3-year-old amphibians. The dynamics of the age structure of C. ornata hemipopulation during the period of amphibian activity (from May to October) varies in different age groups of marsh frogs. The addition of new generations of C. ornata by amphibians of all ages occurs during the warm period of a year. During the winter period, the reproductive structure of C. ornata hemipopulation in the amphibians of all age groups is characterized by the existence of only mature parasites. The addition of young nematodes to the population of marsh frogs during this period does not occur.