Bioaccumulation of heavy metals in common carp: Implications for human health
2012
Yousafzai, A.M. (University of Saskatchewan (Canada). Dept. of Biology) | Siraj, M. (Hazara Univ., Mansehra (Pakistan). Dept. of Zoology) | Ahmad, H. (Hazara Univ., Mansehra (Pakistan). Dept. of Genetics) | Chivers, D.P.
Zn, Ni, Cr, Cu, Cd and Pb were examined in the muscle, intestine, liver, skin and gills of common carp, Cyprinus carpio. Aim of the study was to quantify the accumulation of these metals in various organs and to determine whether these levels pose a human health concern. Our finding fix the metal bioaccumulation order in the muscle of Cyprinus carpio was Zn greater than Cr greater than Cu greater than Pb greater than Ni greater than Cd, in the intestine was Zn greater than Pb greater than Cr greater than Cu greater than Ni greater than Cd, in the liver was Zn greater than Cr greater than Cr greater than Pb greater than Ni greater than Cd, in the skin was Zn greater than Cr greater than Pb greater than Cu greater than Ni greater than Cd and in the gills was Zn greater than Cr greater than Cu greater than Pb greater than Ni greater than Cd. Overall heavy metals burden was in the order of Zn greater than Cr greater than Pb greater than Cu greater than Ni greater than Cd. Different tissues of the fish accumulated heavy metals in the order of intestine greater than skin greater than liver greater than gills greater than muscle. Intestine being the prime target organ indicates the route of the metal uptake was the direct result of dietary exposure. Although muscle accumulated the least level of metals but even then Pb, Ni and Cd in muscle exceed the US, RDA limits and poses a health concern for fish consumers.
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