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Title: Toxic Metals in Fish and Molluscs of Coastal Waters of Zmiinyi island
Authors: Medinets, Volodymyr I.
Denga, Yuriі М.
Snigirov, Sergii M.
Gruzova, Iryna L.
Медінець, Володимир Іванович
Мединец, Владимир Иванович
Citation: Вісник Одеського національного університету. Сер. Географічні та геологічні науки.- 2015. – T20, № 4 (27)
Issue Date: 2015
Publisher: Одеський національний університет ім. І.І. Мечникова
Keywords: Black Sea, Zmiinyi Island, PER SEUS, Toxic Metals, fish, molluscs
Abstract: The aim of this paper is to determinate the levels of pollution in fish and molluscs mass species by Toxic metals (TM) such as Cd, Cu, Hg, Pb, Zn, Сo, Ni, Cr, Fe, Mn for filling gaps in evaluation of descriptor 9 (contaminants in fish and other seafood). Material for analysis comprised results of determination of TM in the tissues samples of mass species of fish and mollusks in the Zmiinyi Island coastal waters in 2012-2014. In total we sampled and processed 28 fish and 20 mollusks samples using national and internationals methods. In the framework of the PER SEUS Project the data on TMs content in fish and molluscs mass species in the Zmiinyi Island area of the Black Sea (40 km from the Danube Delta) were collected for the first time. Analysis of soft tissue samples of molluscs and fish mass species collected has revealed the periodically high TMs concentrations in the samples. It has been shown that the maximal concentrations of TMs were registered in samples of mussel soft tissues, as well as in the samples of mollusc-eating hydrobionts – rapa whelk and round goby. The concentrations of TMs in the samples of other bottom fish, such as grey wrasse and sole, feeding mainly on benthic crustaceans, were significantly lower, and in anchovy (pelagic migratory species) individuals’ soft tissues was minimal. We concluded that the level of pollution in hydrobionts depends significantly on the feeding schemes of each particular species. The maximal pollution levels for practically all hydrobionts were observed in 2012 (the year of heavy precipitation and the highest runoff of the Danube River).
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