Component Communities of Parasites and the Interaction of Parasite Faunas of Non-Commercial Fish in the Kacha River (the Basin of the Enisey)
The structure of the communities of non-commercial fish parasites in the Kacha river (a tributary of the Enisey) was determined for the first time. The studied communities are formed mainly by generalist species (68 %) with an insignificant fraction (16 %) of specialist species. According to the frequency of occurrence, only one species (Trichodinella epizootica Raabe, 1950) with the occurrence frequency > 70 % is related to the basic ones and three to secondary ones (Paratrichodinа incisа, Lom, 1959, Diрlostomum phoxini Faust, 1918, Rhabdochonа denudatа (Dujardin, 1945)). All the other species (46) are additionаl. Characteristic features of the parasitic faunа of fich in the Kacha river are very low indices of the species similarity according to Jacquard, which is an evidence of the originаlity of ecological niches of the studied hosts.