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Assessment of some heavy metals in the tissues(gills,liver and muscle)of Clarias gariepinus from Calabar River,Cross River State,South-eastern Nigeria

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Journal of Coastal Life Medicine 2016年第6期4卷 430-434页

作者： Akaninyene Paul joseph Victor Oscar Eyo andem.bassey andem.joseph udo idung Department of Zoology and Environmental Biology University of CalabarP.M.B.1115 CalabarNigeria Institute of Oceanography University of CalabarP.M.B.1115 CalabarNigeria

Objective:To assess the pollution status of Calabar River in relation to the levels of heavy metal in the tissue of the African catfish[Clarias gariepinus(***)].Methods:A total of 45 samples of *** were purchased from fishermen on landing at Nsidung beach along Calabar River within three months(15 samples monthly)from June to August,*** samples were then put into a cold box containing ice blocks immediately after buying from the *** fish samples were transported immediately to the Chemistry Laboratory,University of Calabar for digestion and heavy metal *** of the muscle,gills and liver were removed from the fresh samples and oven dried at temperature of 120°C to constant weight and digested using standard *** digested tissue portions were analyzed for lead,iron,manganese,cobalt,chromium and cadmium concentrations using atomic absorption ***:Mercury was not detected at all in the muscle,liver and gills of *** mean±SD of metals in liver of *** were:(0.080±0.014),(0.110±0.014),(6.480±1.279)and(0.295±0.021)mg/kg for Cd,Cr,Fe and Mn,*** the gills,heavy metals values were:(0.065±0.021),(0.115±0.035),(5.843±0.558),and(0.345±0.007)mg/kg for Cd,Cr,Fe and Mn,*** the muscles,heavy metals values were(0.045±0.021),(0.115±0.353),(5.150±1.075),and(0.187±0.045)mg/kg for Cd,Cr,Fe and Mn,*** general trend of metals accumulation in tissues of *** showed a decreasing trend of Fe>Mn>Cr>***,the metal accumulation in the three tissues showed a decreasing trend of liver>gills>***:The metal concentrations in the muscle,gills and liver of *** were all below the World Health Organization acceptable range,and as such fishery resources from Calabar River are safe for consumption.

关键词： Heavy metals Accumulation Tissues Clarias gariepinus Calabar River

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