Infestation with nematodes of the Baikal yellowfish and sand sculpin in the lake Baikal

Updated the species composition of round worms from the sand sculpin - subendemic of lake Baikal, baikal yellowfish - endemic of lake Baikal. Sand sculpin and baikal yellow- fish are caught in the lake Baikal. The volume of material processed amounted to 96 copies. Found 4 species of nematodes. The morphological features of these worms are described. Differences in the composition of nematodes were revealed: in the sand sculpin - C. werestschagini and I. hamulatum. C. oschmarini and species of the genus Contracaecum in the sand sculpin are apparently random species. The baikal yellowfish have C. werestschagini, C. oschmarini and C. osculatum baicalensis. Such differences are explained by the fact that the baikal yellowfish is a littoral-pelagic species, and the sand sculpin is pelagic- benthic. The life cycles of two species of nematodes of the genus C. werestschagini and S. oschmarini have not been studied.