Seasonal dynamics of fish predatory with nematode Eustrongylides excisus Jägerskiöld, 1909 (Nematoda: Dioctophymatidae) in Dnipro-Buh estuary and Dnipro river delta

Goncharov, S. L.; Soroka, N. M.; Dubovyi, A. I.

doi:10.15407/animbiol19.04.016

Bìol. Tvarin

2017

DOI: 10.15407/animbiol19.04.016

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Seasonal dynamics of fish predatory with nematode Eustrongylides excisus Jägerskiöld, 1909 (Nematoda: Dioctophymatidae) in Dnipro-Buh estuary and Dnipro river delta

S. L. Goncharov¹,

N. M. Soroka²,

A. I. Dubovyi³

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2024

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Cited by 2 publications

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Dynamics of Eustrongylidosis in Fishes in the Zaporizhzhia (Dnipro) Reservoir, Ukraine

Yesipova,

Sharamok,

Marenkov

et al. 2024

Hydrob J

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The parasitic nematode Eustrongylides excisus, Jagerskiold, 1909 (Dioctophimida: Dioctophimidae) is widespread and zoonotic. 23 fish species were studied in view of infestation by this parasite. The maximal infestation with E. excisus larvae were recorded in seven years after the first detection of the parasite in the reservoir in 2008. Maximal infestation rate was found in the monkey goby (90%, 8.5±0.93 spec/ind) and the common perch (79%, 17.2± 1.53 spec/ind). In pike and pikeperch, the infestation rates were half as low. In other fishes (European catfish, Eurasian daces, Prussian carp, White bream), the parasite occurred sporadically with the maximum infestation extension from 3.2 to 13.6%. The dynamics of fish eustrongylidosis in the Zaporizhzhia (Dnipro) reservoir was characterized by the following stages: increase (2008-2013), maximum development (2013-2018), and decline (2018-2023) of infestation rates. The spatial distribution of E. excisus was characterized by high density of infested fishes in the lower section of the reservoir owing to accumulation of silt deposits and intensive development of oligochaetes in them, which are the first intermediate hosts of the parasite. We suppose, that the decline in the infestation rates decrease in the Zaporizhzhya (Dnipro) reservoir is temporary, as the reservoir provides favorable conditions for the parasite's development cycle: progressive eutrophication and siltation; presence of intermediate and paratenic hosts; favorable conditions for the cormorants nesting - the ultimate hosts of eustrongylids.

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Dynamics of Eustrongylidosis in Fishes in the Zaporizhzhia (Dnipro) Reservoir, Ukraine

Yesipova,

Sharamok,

Marenkov

et al. 2024

Hydrob J

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Зараженность рыб личинками Eustrongylides cf. excisus Jägerskiöld, 1909 (Nematoda: Dioctophymatidae) в дельте реки Дон

Казарникова,

Корниенко,

Степанова

et al. 2024

Science in the South of Russia

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Паразитические нематоды рода Eustrongylides распространены по всему миру. В роли промежуточных или паратенических хозяев у них выступают пресноводные рыбы. С 2019 по 2023 г. на паразитологический анализ были взяты 231 экземпляр азовских бычков: бычок-кругляк Neogobius melanostomus (Pallas, 1814), бычок-песочник Neogobius fluviatilis (Pallas, 1814), бычок-сирман Ponticola syrman (Nordmann, 1840) - и 122 экземпляра судака Sander lucioperca (Linnaeus, 1758). Полость тела и серозные покровы кишечника являлись основными местами локализации паразитов у бычков, мышцы и брюшная стенка - у судака. После вылова рыб паразиты нередко мигрировали через мускулатуру к поверхности тела. От 10 до 93,3 % обследованных рыб было заражено личинками эустронгилид. Анализ последовательностей региона ITS1 и гена 28S рРНК позволил идентифицировать обнаруженных паразитов как Eustrongylides cf. excisus . Наиболее высокий уровень средней интенсивности инвазии нематодами отмечался у бычка-сирмана (3,5 ± 2,11... 9 ± 0,25 экз.) и бычка-кругляка (4 ± 1,3... 7 ± 2,1 экз.),у бычка-песочника он колебался в пределах 1 ± 0,1... 9 ± 1,7 экз., у судака - 1,2 ± 0,25... 7,9 ± 1,7 экз. Помимо изучения отдельных вопросов эпизоотологии личинок Eustrongylides обсуждаются потенциальные проблемы, связанные со здоровьем человека и животных.

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Seasonal dynamics of fish predatory with nematode Eustrongylides excisus Jägerskiöld, 1909 (Nematoda: Dioctophymatidae) in Dnipro-Buh estuary and Dnipro river delta

Cited by 2 publications

References 7 publications

Dynamics of Eustrongylidosis in Fishes in the Zaporizhzhia (Dnipro) Reservoir, Ukraine

Dynamics of Eustrongylidosis in Fishes in the Zaporizhzhia (Dnipro) Reservoir, Ukraine

Зараженность рыб личинками Eustrongylides cf. excisus Jägerskiöld, 1909 (Nematoda: Dioctophymatidae) в дельте реки Дон

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