Specific Features of Host-Parasite Relations in the System "Chaetogaster limnaei Baer, 1887 (Olygochaeta) - the Mollusk of the Lymnaea Genus (Gastropoda)" in the Water Reservoirs of Kemerovo
The purpose of the research: the study of the role of Chaetogaster limnaei (Oligochaetes) in the “parasite-host” system on the example of its relationship with some mollusks of the genus Lymnaea in the aquatic biotopes in the city of Kemerovo. Materials and methods. 214 specimens of L.(Radix) auricularia and 129 specimens of L.(Lymnaea) stagnalis have been studied. The contagion of mollusks was studied using the compressor method on live temporary preparations. Species diagnostics of mollusks was carried out on the shells on the works of S.I. Andreev. Contagion of mollusks was studied by the compressor method for live temporary preparations. The definition of oligochaetes was performed using the works of V.P. Semerny and M.V. Chertoprud. Determination of trematodes in cercariae - according to the works of E.N. Frolova. Research results. The studies have shown that mollusks are infected with Chaetogaster limnaei and trematode larvae of families Strigeidae, Diplostomatidae, Plagiorchidae, Echinostomatidae. In case of joint parasitism with Ch. limnaei in R. auricularia, the intensity of invasion by trematode larvae was insignificant, and in the absence of the hetogaster, superinvasion of metacercaria strigeida and lancet cercariae plagiarchids was observed. Thus, the oligochaete Ch. limnaei, settling in R. auricularia, significantly reduces the infection of this mollusk with the other types of parasites.