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Study shows transfer of heavy metals from water to fish in Huelva estuary
Date:6/16/2009

tical index (Pearson coefficient), the scientists found a link between the presence of zinc and cadmium in the water and in the tissues of the fish, above all in the gilthead bream, a species that lives in open water. There was a lower correlation in the case of the sole, which tends to be a bottom dweller, although it also contained lead. Zinc and cadmium appeared in the gills and muscles, but above all in the liver, where copper was also detected at high concentrations.

This research forms part of the project "Production and validation of environmental quality criteria in sensitive coastal ecosystems" financed by the former Ministry of Education and Science, and which also includes analysis of the levels of organic pollutants in the Huelva estuary, as well as the "hystopathological" damage to fish caused by this contamination.

The central government of Spain and the regional government of Andalusia have been developing pollution reduction policies for the estuary since 1997. The measures adopted have included waste water treatment, metal retention processes, waste treatment and reduction of discharges.


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