Водные биоресурсы и их рациональное использование
13
Волосников Глеб Игоревич
–
Россия, 626152, Тобольск; Тобольская комплексная
научная станция Уральского отделения Российской академии наук; младший научный
сотрудник группы экологии гидробионтов; g-volosnikov@mail.ru.
IN AUTUMN PERIOD OF LIFE CYCLE (IRTYSH RIVER)
E. L. Liberman, G. I. Volosnikov
Tobolsk Complex Scientific Station of the Ural Branch of the Russian Academy of Sciences,
Tyumen Region, Tobolsk, Russian Federation
Abstract. The article describes the specific features of the fish stocks in the Irtysh River,
the main share of which is made up of representatives of ide
Leuciscus idus (Cyprinidae). The para-
sitic community of the Irtysh ide in the autumn period of the life cycle has been studied.
A total
of 15 individuals of fish of various sexes, aged 1+ to 6+, weighing 174-1,086 g, length 25.2-44.6 cm,
were examined. The invasion of ide by 15 species of parasites belonging to 5 systematic groups was
established: Monogenea – 2, Cestoda – 1, Trematoda – 9, Nematoda – 1, Copepoda – 2. The dominant
species in this community are
R. campanula and
Metorchis sp (gills, fins). Monogenes have a lim-
ited presence:
D. ramulosus and
P. megan. There has been marked 100% infection of ide muscles
with metacercaria
O. felineus.
Fish fins are invaded by R. campanula and
Metorchis sp. in 100%
of cases. The ureter is invaded by
P. elongatum with EI by 13.3%. A massive parasitizes of cypri-
nids –
S. globiporum- parasitizes in the intestines of ide with EI = 60.0%.
The larval stage
of
R. acus was noted on the mesentery in 60.0% of the examined fish. The crustaceans
E. sieboldi
and
T. polycolpus parasitized on the gills and fins of ide, respectively. It has been stated that the described
composition of the parasitic community is typical for ide regardless of its habitat. The invasion
of the Irtysh ide by the pathogen of opisthorchiasis is at a high level, the intensity of infection
of ide with metacercaria O. felineus in the Irtysh is 100%, which is dangerous for the population
when eating fish that have not undergone heat treatment.
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