engleski

Biomonitoring of selected contaminants in shellfish, Mytilus galloprovincialis, from the coastal area of Croatia during the period from 2000 to 2009.

Biomonitoring of contaminants (Cd, Pb, Cu, Zn, Cr, HgTOT, lindane, PCBs and DDTs ) in shellfish, Mytilus galloprovincialis, was conducted at 18 sites distributed across the entire coastal area of Croatia once a year over the period 2000-2009. Based on the obtained data pertaining to metal levels in shellfish, it can be concluded that the best status was observed at sites located in the outer estuaries of the Neretva and Krka rivers as well as in the Lim Bay area under submarine freshwater influence, while the poorest status was observed in the areas under anthropogenic impact, e.g. ports, semi-enclosed bays and industrial areas. Statistical analysis of data showed an upward trend for all metals during the period of investigation. The increase in metal concentrations appears to be the result of enhanced industrial activity during the indicated time period, mostly metal production and processing industry which showed more than 190 % growth throughout the period from 2000 to 2008. Analysis of data with regard to organic pollutants in shellfish revealed lower concentrations of lindane in comparison with DDT, while concentrations of PCB compounds (Aroclor 1254 + Aroclor 1260) were significantly higher in relation to chlorinated pesticides. Highest concentrations of organic pollutants were, similar to metals, established in the areas under anthropogenic influence, however, a decreasing trend was observed at most sites. The decrease in the levels of chlorinated pesticides (lindane, DDT compounds) was more distinguished, which was to be expected considering that the use of lindane has been banned in Croatia since 2001, while the ban on the use of DDT was enforced in 1972. Moreover, there is no national legislation prohibiting the import and use of PCB compounds.

biomonitoring; contaminants; Mytillus galloprovincialis; coastal waters

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