Abstract
The purpose of the research is studying fauna of Coregonus sardinella parasites of the Indigirka River. Materials and methods. The studies were carried out in August–September 2015–2017 in the lower reaches of the Indigirka River. A total of 421 specimens of C. sardinella were studied using partial parasitological autopsy method, of which: 227 specimens aged from 2+ to 12+ in 2015, 31 specimens aged from 4+ to 8+ in 2016, 163 specimens aged 2+ to 12+ in 2017. We used the determinant of parasites of fresh-water fish of the USSR fauna to determine the species affiliation of the revealed parasites. The infection intensity, and abundance index were assessed. Results and discussion. 12 species of parasites were found in C. sardinella of the Indigirka River, namely, 1 species of protozoa, 4 species of cestodes, 3 – nematodes, 1 species of scrubs, 1 species of leeches, 2 species of parasitic crustaceans. Among the parasitic diseases of C. sardinella that are dangerous to human health, diphyllobothriosis is registered, and trienophorosis is among those that affects the marketable appearance of fish. High infection of C. sardinella with Diphyllobotrium sp. in the water area of the Indigirka River has been observed for several decades, which suggests its leading role in the circulation of this helminth in the studied reservoir. The study of the fauna of C. sardinella parasites show the need for continuous monitoring of fish infection rates to prevent possible epizootics and even death of juvenile fish.
Highlights
12 species of parasites were found in C. sardinella of the Indigirka River, namely, 1 species of protozoa, 4 species of cestodes, 3 – nematodes, 1 species of scrubs, 1 species of leeches, 2 species of parasitic crustaceans
Among the parasitic diseases of C. sardinella that are dangerous to human health, diphyllobothriosis is registered, and trienophorosis is among those that affects the marketable appearance of fish
High infection of C. sardinella with Diphyllobotrium sp. in the water area of the Indigirka River has been observed for several decades, which suggests its leading role in the circulation of this helminth in the studied reservoir
Summary
Ольга Дмитриевна Апсолихова 1, Евгений Вячеславович Бурмистров 1, Валерий Алексеевич Однокурцев 2. Цель исследований: изучение паразитофауны сибирской ряпушки реки Индигирка. Всего методом неполного паразитологического вскрытия исследован 421 экз. У сибирской ряпушки реки Индигирка обнаружено 12 видов паразитов: 1 вид простейших, 4 вида цестод, 3 – нематод, 1 – скребней, 1 –пиявок, 2 вида паразитических ракообразных. Из опасных для здоровья человека паразитарных болезней сибирской ряпушки зарегистрирован дифиллоботриоз, из влияющих на товарный вид рыб – триэнофороз. Изучение паразитофауны сибирской ряпушки показывает необходимость проводить постоянный мониторинг за показателями заражённости рыб для предотвращения возможных эпизоотий и даже гибели молоди рыб. Ключевые слова: сибирская ряпушка, паразитофауна, река Индигирка, дифиллоботриоз, плероцеркоиды. А. Паразитофауна Coregonus sardinella реки Индигирка // Российский паразитологический журнал.
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