Migratory smelt (Osmerus eperlanus eperlanus L.) may be perceived as a valuable indicative
organism in monitoring the current environmental status and in assessment of a potential risk
caused by selenium pollution. The aim of the study was to compare the selenium content in the
European smelt from the Bay of Pomerania, Gdansk, and the Curonian Lagoon. The experimental
material consisted of smelt samples (muscle) caught in the bays of Gdansk and Pomerania
and the Curonian Lagoon (estuaries of the three largest rivers in the Baltic Sea basin: the Oder,
the Vistula and the Neman). A total of 133 smelt were examined (Pomerania Bay n = 67;
Gdansk Bay n = 35; Curonian Lagoon n = 31). Selenium concentrations were determined spectrofluorometrically.
The data were analyzed statistically using one-way analysis of variance,
calculated in Statistica PL software. The region of fish collection significantly affected the
content of selenium in the examined smelts. The highest content of selenium was observed in
smelt caught in the Bay of Gdansk (0.236 μg g-1 w.w.), then in smelt from the Pomeranian Bay
(0.165 μg g-1 w.w.), and the lowest in smelt obtained in the Curonian Lagoon (Lithuania)
(0.104 μg g-1 w.w.). The low concentrations of selenium recorded in the smelt show that there is
a deficiency of this element, especially in the Curonian Lagoon (Lithuania). Geochemically,
Poland and Lithuania are selenium deficient areas. Migratory smelt may serve as indicative
organisms of environmental levels of selenium.
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