Trace metal distribution in tissues of cichlids (Oreochromis niloticus and O. mossambicus) collected from wastewater-fed fishponds in East Calcutta Wetlands, a Ramsar site [India]
2006
Chatterjee, S.,Government College of Engineering and Leather Technology, Salt Lake City, Calcutta (India) | Chattopadhyay, B. | Mukhopadhyay, S.K.,Durgapur Government College, West Bengal (India)
Atomic Absorption Spectrophotometry (AAS) studies were employed to estimate metal (Cr, Mn, Fe, Cu, Zn, and Pb) concentrations in water, and bottom sediment of fishponds and fish tissues (gill, liver, muscle, and bones) of cichlids: Nile tilapia, Oreochromis niloticus L. and Mozambique tilapia, O. mossambicus (Peters, 1852), collected from contaminated and control sites. Chromium, which was a highly publicised contaminant of tannery effluents, showed a similar distribution pattern (muscle gill liver bone) in these fishes. Concentrations of non-essential metals like Pb were highest in Nile tilapia liver (17.9 mg/kg) followed by Mozambique tilapia liver (14.7 mg/kg). Principal component analysis with Varimax rotation revealed that Fe and Mn were in the first and second component, respectively, to influence metal uptake and bioaccumulation
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