Trematodes of cyprinids fish of the Lower Irtysh

Abstract

Abstract The paper presents studies of representatives of cyprinid fish species inhabiting the Lower Irtysh was conducted for invasion by multicellular organisms of the Trematoda class. A total of 54 individuals of Abramis brama, 24 individuals of Rutilus rutilus lacustris and 15 Leuciscus idus were studied. Parasitism of 13 species of trematodes was found in cyprinid fish. The first group consisted of 6 species whose entire life cycle is associated with the aquatic environment, where fish are the final hosts (R. campanula, P. elongatum, A. isoporum, S. globiporum, S. bramae, A. lucii). The second group includes 7 species whose marites are parasitic in birds and mammals (D. chromatophorum, Metorchis sp., H. triloba, I. pileatus, I. platycephalus, O. felineus, P. ovatus). Common to bream, roach, and ide are D. chromatophorum, O. felineus, and R. campanula. Metacercaria I. platycephalus are registered in one bream and two ides. Sexually Mature individuals of the trematode of cyprinid -Sphaerostomum bramae, parasitize in the intestines of bream and roach. The greatest species similarity of trematode fauna is observed between bream and roach, as well as bream and ide, the least similarity of parasites in ide and roach. The dominant species of parasitic community of fish are the following parasites: bream - Sphaerostom bramae, ide - metacercaria Rhipidocotyle campanula & Metorchis sp., roach - Rhipidocotyle campanula.