This paper reports the accumulation of potentially toxic elements (PTEs) in trout (Salmo
trutta L.) sampled from rivers Raška and Studenica in Serbia, which are assumed to be free of
pollutants. The ...presence of PTEs, essential elements and heavy metals, in aquatic ecosystems is
usually a consequence of anthropogenic activities such as mining, agricultural drainage, sewage
discharge, industrial effluent discharge, gasoline leakage from fishing boats, and accidental
chemical waste spills. The appearance of these elements in water and aquatic biota can also be a
consequence of natural processes such as atmospheric deposition and weathering, earth’s crust
erosion, and volcanic eruption. Since trout inhabits pristine upper reaches of the river, this
species represents an appealing model to assess the biological impact of environmental and
geochemical contamination in freshwater ecosystems. The concentrations of 14 PTEs in the edible
part (EP, muscle + skin) of trout were evaluated. The data obtained in this study confirmed that
freshwater, even if far from industrial and anthropogenic activities, can lead to the accumulation
of PTEs related to the site's geochemical morphology.
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