Abstract
The results of a parasitological study of bream Abramis brama (Linnaeus, 1758) from the Lower Irtysh basin are presented. Twelve species of parasites were found: infusoria (2 species), monogeneans (4 species), cestodes (1 species), and trematodes (5 species). Six of them have a direct life cycle, and six species develop with a change of hosts. Specific parasites for bream are Gyrodactylus elegans, Dactylogyrus wunderi, D. falcatus, and D. zandti. For the first time, Dactylogyrus falcatus is recorded in the Ob basin, and D. zandti and D. wunderi are recorded in the Lower Irtysh basin. The infestation of bream with metacercariae Opisthorchis felineus is established (the extent of invasion is 55.5%, the abundance index is 2.6).
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