The study aims to investigate on the use of metallotioneine as biomarkers of environmental impact in aquatic systems. The interactions of the toxic elements with the living organisms in water marine can determine, in order to species characteristics, phenomena of biomagnification full-length the trofic chain or phenomena of bio concentration through waters. In numerous aquatic organisms have been isolated and studied the metallotioneine (Mts) which exposure biomarker of the heavy metals. The chemical analysis of these bioindicators establishes, therefore, a sensitive method of measure of the bioavailability, during the years, of the present pollution agents in the environment Two study areas were selected along the Latium coasts differentiated with respect to the economic activities and the kind and level of environmental impact (mainly marine pollution). These areas were selected in order to differ at the maximum degree the economical development and environmental quality. In particular the presence of pollutants in the sea due to the land activities was evaluated to compare the quality-emergency of the fishing products from localities subject to various environmental impacts. The heavy metal concentrations were determined in water samples and in different sections of the fishes to aim to understand the metabolism and the origin. The metals mainly study are: Mercury (Hg), Zinc (Zn), Nichel (Ni), Lead (Pb), Cadmium (Cd) and Copper(Cu). All the data produced were treated by means of multivariate analyses to provide a final indication reliable and exhaustive.
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