Feeding of juvenile sterlet (Acipenser ruthenus, Acipenseridae) in the Danube River midstream

Strel’nikova, A. P.

doi:10.1134/s0032945212010110

Cited by 10 publications

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“…Metal accumulation in fish tissues can be influenced by various factors, such as season, gender, size, mode of feeding, physiological state, water temperature, and pH (Golovanova, ). Given that the food is considered to be the major pathway of metal intake by fish (Golovanova, ), different accumulation patterns in sterlet and barbel might be a consequence of their differing feeding preferences (Djikanovic et al, ; Strel'nikova, ). Moreover, differences in metal accumulation between the two species might also be a consequence of their different ecology (Ristić, ; Penaz et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…and Gammarus sp .) and leeches (Hirudinea), as well as on larvae of chironomids and trichopterans (Strel'nikova, ). The most important groups in barbel diet in the same area comprise Amphipoda (Gammaridae), as well as other macrozoobenthos groups, such as mollusks, insects (Ephemeroptera, Plecoptera, Chironomidae, and Diptera), and Oligochaeta (Djikanovic et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Use of histopathology and elemental accumulation in different organs of two benthophagous fish species as indicators of river pollution

et al. 2014

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The bottom feeding fish species have a good potential to be used for assessments of pollution, as they are under pressure from pollutants from both water and sediments. In this study, the level of similarity of histopathological responses to pollution in gills and liver between barbel (Barbus barbus) and sterlet (Acipenser ruthenus) from the Danube River was assessed, and compared with elemental concentrations in their gills, liver, and muscle. Results indicate that the detected metal concentrations were likely cause of different tissue responses in gills and liver of the two investigated fish species. Statistical analysis indicated a clear differentiation of the two species based on elemental concentrations and the level of histopathological changes in gills and liver. Metal concentrations exceeded maximum acceptable concentrations in a number of analyzed specimens, which indicates the importance of this type of monitoring. Results indicate that barbel is a better indicator for specific, rather narrow sites, whereas sterlet is a better indicator of larger (longer) water current segments. Obtained information could be of importance for both scientists and fishery and water management authorities working on the development of water monitoring programs.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Use of histopathology and elemental accumulation in different organs of two benthophagous fish species as indicators of river pollution

et al. 2014

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“…For this work, data were used from four publications (Janković 1958;Janković et al1994;Fieszl et al 2011;Streĺnikova 2012) as well as from our material collected from professional fishermen, using nets of different mesh sizes (32-50 mm), at river sectors 1173-1132 rkm during the period 2002-2003. Maps showing nine locations along the River Danube (rkm 1694-852) where diet of sterlet was analysed are presented in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Review of sterlet (Acipenser ruthenusL. 1758) (Actinopterygii: Acipenseridae) feeding habits in the River Danube, 1694–852 river km

Đikanović

Skorić

Lenhardt

et al. 2014

Journal of Natural History

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The aim of this work is to present the variation in the sterlet's (Acipenser ruthenus L. 1758) diet along the course of the River Danube, from 1694 to 852 river km. The diet of sterlet mostly comprised 12 bottom fauna taxa. Sterlet in the Danube feed mainly on larvae of Trichoptera, Chironomidae (Diptera) and Gammaridae (Amphipoda), with a reduction in food composition variability close to the Djerdap I dam and in the reservoir between the two dams. The other components of the diet were Corophium sp., Asselus sp., Mollusca, Oligochaeta, Annelida, Insecta, Nematoda and Hirudinea. The organisms typical of lithorheophilic and psammorheophilic biocoenoses play a considerable role in the diet of the sterlet. Composition of bottom fauna as food items varies due to changes in environmental conditions induced mainly by the construction of two dams: Djerdap I (943 river km, 1970) and Djerdap II (863 river km, 1984).

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“…It is common in the basins of the Siberian rivers: Ob and Yenisei, where it forms a subspecies -Acipenser ruthenus marsiglii (Brandt, 1833) (Zhuravlev, 2000). Sterlet quite like warm water, winter in river pockets, and are typical benhtophages -the basis of their food is chironomid larvae, Simuliidae, mayflies, dragonflies, molluscs, and other representatives of macrozoobenthos (Strel'nikova, 2012). Because of the high industrial value of sterlet, and therefore their intensive fishing, and also change in hydrological and hydrochemical regimes of water bodies (places of spawning and fattening), by the end of the 1970s, the reserves of sterlet in the Ob-Irtysh basin had become critical (Liberman, 2017).…”

Section: Introductionmentioning

confidence: 99%

The parasitofauna of the Siberian sterlet Acipenser ruthenus marsiglii of the Lower Irtysh

Liberman¹,

Voropaeva

2018

Regul. Mech. Biosyst.

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In the Ob-Irtysh basin, studies on the parasitofauna of the Siberian sterlet are very limited and confined to the middle of the twentieth century. The decrease in the numbers of sterlet over the past half century may have led to a change in the qualitative and quantitative composition of the parasitofauna. The aim of this work is to study the parasitofauna of the Siberian sterlet in the rivers Irtysh and Tobol. 85 specimens of Siberian sterlet (L = 27.8–51.5 cm, 2+ – 6+) from the Tobol and Irtysh rivers were examined by the method of complete parasitological dissection during the periods from 5 to 21 June and from 14 to 22 July 2017. A comparison of the biodiversity of parasites was performed using the indices: Berger-Parker. 11 species of parasites were found, including four species specific to sturgeons: Cryptobia acipenseris (Joff, Lewashow, Boschenko, 1926), Haemogregarina acipenseris (Nawrotzky, 1914), Crepidostomum auriculatum (Wedl, 1858), Capillospirura ovotrichura (Skrjabin, 1924). Seven broadly specific species: Trichodina sp., Proteocephalus sp. (plerocercoids), Diplostomum chromatophorum mtc. (Vrown, 1931), Echinorhynchus cinctulus (Porta, 1905), Piscicola geometra (Linnaeus., 1761), Ergasilus sieboldi (Nordmann, 1832), Unionidae gen. sp. Cryptobia acipenseris and H. acipenseris were recorded for the first time in the Ob-Irtysh basin. C. acipenseris was found only in three fish from the total number of examined sterlet (3.5%). In the River Tobol the extent of infestation H. acipenseris was higher (22.7%) than in the River Irtysh 11.1%. The carriers of C. acipenseris and H. acipenseris in the Lower Irtysh are allegedly leeches of Piscicola geometra (10.6%). The most common parasites found were C. auriculatum (32.9%) and C. ovotrichura (15.3%). In the River Irtysh, metacercariae of Diplostomum chromatophorum (Vrown, 1931) (metacercariae) were discovered in the lens of the eye in the studied fish. The maximum EI of this parasite was noted in the fish sample near the city of Tobolsk – 12.5% with AI – 1 and IO – 0.12. In the Gornoslinkino area in June and July, the infection level was low (EI 4.3% and 8.3%, respectively). In the June sample of fish from the River Tobol no metacercariae of this species were detected. Single cases of infection of Proteocephalus sp. (plerocercoid), E. cinctulus, E. sieboldi, Unionidae gen. sp. were found. In the River Irtysh the parasitofauna was dominated by C. ovotrichura, in the River Tobol – C. auriculatum. The number of parasite species noted in the Siberian sterlet in the Ob-Irtysh basin according to our own and literary data is greater than that found in sterlet from the River Yenisei: 18 and 11 respectively. Common to the sterlet of the two basins are 8 species of parasites: Cryptobia acipenseris, Diclybothrium armatum, Crepidostomum auriculatum, Capillospirura ovotrichuria, Truttaedacnitis clitellarius, Echinorhynchus cinctulus, Piscicola geometra, Unionidae gen. sp. The fauna of the Ob-Irtysh basin was enriched by the "southern" narrowly specific parasite of sturgeon – H. acipenseris. For many years the infection of C. auriculatum has practically not changed.

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Feeding of juvenile sterlet (Acipenser ruthenus, Acipenseridae) in the Danube River midstream

Cited by 10 publications

References 0 publications

Use of histopathology and elemental accumulation in different organs of two benthophagous fish species as indicators of river pollution

Use of histopathology and elemental accumulation in different organs of two benthophagous fish species as indicators of river pollution

Review of sterlet (Acipenser ruthenusL. 1758) (Actinopterygii: Acipenseridae) feeding habits in the River Danube, 1694–852 river km

The parasitofauna of the Siberian sterlet Acipenser ruthenus marsiglii of the Lower Irtysh

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