Assessment of some heavy metals in the tissues(gills,liver and muscle)of Clarias gariepinus from Calabar River,Cross River State,South-eastern Nigeria
Assessment of some heavy metals in the tissues (gills, liver and muscle) of Clarias gariepinus from Calabar River, Cross River State, South-eastern Nigeria作者机构：Department of Zoology and Environmental BiologyUniversity of CalabarP.M.B.1115 CalabarNigeria Institute of OceanographyUniversity of CalabarP.M.B.1115 CalabarNigeria
出 版 物：《Journal of Coastal Life Medicine》 (海岸生命医学杂志（英文版）)
年 卷 期：2016年第4卷第6期
页 面：430-434页
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
主 题：Heavy metals Accumulation Tissues Clarias gariepinus Calabar River
摘 要：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 FeMnCr***,the metal accumulation in the three tissues showed a decreasing trend of livergills***: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.
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