The diversity and similarity of perch parasites fauna in the lakes of Eravnа-Khargin group (Zabaikalye, Baikal-Lensky watershed)

The data on the parasite fauna of perch in Lakes Sosnovskoe, Bolshoe Eravnoye, Isinga Gunda, Shuchiye, and Turkhul in the long-term period of low level of water are presented in this article. We found 13 parasites species. Dominating parasites in all lakes are trematodes Bunodera luciopercae, Diplostomum spp., Ichthyocotylurus pileatus. Parasite faunas of perch in neighboring lakes with equal composition of ichthyofauna have the maximum level of species similarity; the ones from lakes separated by natural barrier (mountain ridge) have its minimum levelt.