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Closed Access item Contaminant accumulation and multi-biomarker responses in field collected zebra mussels (Dreissena polymorpha) and crayfish (Procambarus clarkii), to evaluate toxicological effects of industrial hazardous dumps in the Ebro river (NE Spain).
Soto, D. X.
Grimalt, Joan O.
|Keywords:||Biomarker, Metals, Organochlorine, Zebra mussel, Crayfish, Oxidative stress|
|Citation:||Chemosphere 78(3) : 232-240 (2010)|
|Abstract:||Large amounts of industrial waste containing high concentrations of mercury, cadmium and organochlorine
residues were dumped in a reservoir adjacent to a chlorine-alkali plant in the village of Flix(Catalonia,
Spain), situated at the shore of the lower Ebro river. Effects of these contaminants to aquatic river invertebrates
were assessed by integrating analyses of metals and organochlorine residues in field collected
zebra mussels and crayfish with awide range of biomarkers. Biological responses included levels of metallothioneins,
activities of ethoxyresorufin-O-deethylase, oxidative stress biomarkers (glutathione content,
enzymatic activities of superoxide dismutase, catalase, glutathione S-transferase, glutathione peroxidise
and glutathione reductase), levels of lipid peroxidation and of DNA strand breaks. The results obtained evidenced
similar response patterns in mussels and crayfish with increasing toxic stress levels from upper
parts of the river towards the meander located immediately downstream from the most polluted site,
close to the waste dumps. The aforementioned stress levels could be related with concentrations of mercury,
cadmium, hexachlorobenzene, polychlorobiphenyls and dichlorodiphenyltrichloroethanes from 4-
to 195-fold greater than local background levels. The response of biomarkers to these pollutant concentrations
differences was reflected in high activities and levels of antioxidant enzymes, metallothioneins, lipid
peroxidation and DNA strand breaks and decreased levels of glutathione.|
|Description:||9 páginas, 3 figuras, 3 tablas.|
|Publisher version (URL):||http://dx.doi.org/10.1016/j.chemosphere.2009.11.003|
|E-ISSNmetadata.dc.identifier.doi = DOI:||1879-1298|
|Appears in Collections:||(CEAB) Artículos|
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