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Heavy metals accumulation in freshwater mussels (Lamellidens marginalis) as a biological monitor inhabiting in Dhanmondi Lake, Dhaka, Bangladesh.

Sabia Sultana, A. K. M. Nur Alam Siddiki, Md. Rokonujjaman, M. Niamul Naser, Abdus Salam, Md. Abdus Salam*


The heavy metal concentration (e.g., Mn, Zn, Pb and Ni) were determined in soft tissues and shells of freshwater mussels (Lamellidens marginalis) at the various sites of Dhanmondi lake, Dhaka, Bangladesh between the period April, 2010 and March 2011. The heavy metal concentrations in shells and soft tissues of freshwater mussels were tended to vary significantly among sampling points and seasons in Dhanmondi Lake. Distribution of heavy metals in shell and soft tissue of Lamellidens marginalis followed the order Mn>Zn>Pb>Ni, respectively. According to the t-test, level of manganese, zinc and lead under investigation between shell and tissue showed statistically significant differences [Mn: t=-11.387; df=16; P=0.000; Zn: t=-2.590; df=16; P=0.020 and Pb: t=-2.8679; df=16; P=0.011].


Heavy metal; Freshwater mussel; Biological monitor; Dhanmondi Lake.

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