IJEP 42(7): 806-812 : Vol. 42 Issue. 7 (July 2022)
Piyali Das* and Mithra Dey
Assam University, Department of Ecology and Environmental Science, Silchar – 788 011, Assam, India
In the present study the selected heavy metals, such as zinc (Zn), cadmium (Cd), chromium (Cr), lead (Pb), copper (Cu) and nickel (Ni) were determined in water, sediment and gill, liver, muscle of fish H. fossilis, L. rohita and O. niloticus from different aquaculture ponds of Badarpur, Karimganj district, Assam. The concentration of heavy metals varied significantly among fish species and their organs. Among the three organs muscles contained the lowest concentrations of all metals. In most studied fishes, the liver was the target organ for Cu, Zn and Fe accumulation. Pb and Cd, however, exhibited their highest concentrations in the gills. The result of the study revealed that the concentration of heavy metals in water, sediment and in different species were within the recommended limit set-up by different organizations and are considered to be safe for human consumption.
Heavy metals, fish species, accumulation
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