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Journal of Fisheries and Aquatic Science
Year: 2013  |  Volume: 8  |  Issue: 1  |  Page No.: 287 - 290

Bioaccumulation of Heavy Metals in Freshwater Clarias anguillaris and Parachanna africana from Lake Geriyo in Yola, Nigeria

B.Y. Jonathan, H.M. Maina and Y.M. Musa    

Abstract: This study was carried out to determine the bioaccumulation of heavy metals in Clarias anguillaris and Parachanna africana from lake Geriyo Yola, Nigeria using Energy Dispersive X-ray Fluorescence (EDXRF) spectrophotometer. The results in (mg kg-1, dry weight) showed different levels of Cr, Cu, Mn, Fe, Ni, Zn and Pb in the two fish species. The order of heavy metals accumulated by C. anguillaris and P. africana are Cr>Fe>Zn>Mn>Cu>Ni>Pb and Ni>Fe>Zn>Cu, respectively. The levels of Cr, Mn and Ni in C. anguillaris and in Ni in P. africana were higher than WHO and FEPA recommended Maximum Permissible Limits (MPL) in fish, while the levels of Zn, Cu and Pb were below the standards. The results suggest that lake Geriyo has high pollution loads of these heavy metals in fishes and could pose a health hazards to man. Consequently, close monitoring of heavy metal loads in lake Geriyo is recommended with a view to minimizing the risks to health of the population that depend on the lake for their water and fish supply.

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