Details

Autor(en) / Beteiligte

• Squadrone, S.
• Prearo, M.
• Brizio, P.
• Gavinelli, S.
• Pellegrino, M.
• Scanzio, T.
• Guarise, S.
• Benedetto, A.
• Abete, M.C.

Titel

Heavy metals distribution in muscle, liver, kidney and gill of European catfish (Silurus glanis) from Italian Rivers

Ist Teil von

• Chemosphere (Oxford), 2013-01, Vol.90 (2), p.358-365

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2013

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• ► Hg, Cd, Cr, As and Pb levels were evaluated in organs of European catfish (Silurus glanis) from Po River. ► Hg contents exceeded the EC maximum level while Cd and Pb fit the EC regulatory limits. ► Hg level was significantly related to sampling site and to size and age of S. glanis. ► There are highly significant differences among the fish organs for the accumulation of heavy metals. The accumulation of heavy metals in freshwaters has direct consequences to man and ecosystem. Thus, in this study, the concentrations of mercury, cadmium, lead, arsenic and chromium in organs of the predator European catfish (Silurus glanis) were investigated. Samples were collected annually in five sites covering the area of the Po River (North Italy) between 2007 and 2009. Metals were differently distributed in the various organs, the highest concentrations of Hg were found in muscle and liver, Cd in kidney, Pb in gill and liver, as in muscle, and of Cr in gill and liver. Our survey found Hg exceeding the Maximum Levels (MLs) of 0.5ppm in 18% of samples, while Pb and Cd were lower than the MLs set by European regulations in muscle tissues (1881/2006/EC and 629/2008/EC). Hg concentrations were significantly related to sampling stations studied, according to the presence of many industrial activities in the catchment area of Bormida and Tanaro Rivers. The finding that Hg did not fit food fish legislation limits indicated that S. glanis flesh might not be utilised for human consumption. A close monitoring of metals pollution is strongly recommended especially in piscivorous fish, cause their bioaccumulation capacity.