Levels of Bioaccumulation of Some Heavy Metals in Fish (Tilapia zilli) and Their Concentration in Water and Sediment of Owubu Creek, Niger Delta, Nigeria

Abstract Bioaccumu lation of some heavy metals were determined in water, sediment and fish samples fro m owubu creek using atomic absorption spectrometer. The result indicated that the order of b ioaccumulat ion of heavy metals in water were 2.85, 0.35, 0.03 and 0.02 for Cu>Pb>Fe>Mg, with Cu having the highest bioaccumulation. In sediment the order of bioaccumulat ion was Fe>Cu>Pb >Cd with their values of 674, 8.31, 6.22 and 0.01 respectively, with Fe having the h ighest value. The order of bioaccumu lation of metals in fish tissue and digestive systems were Fe>Cu>Pb and Fe>Cu>Pb with their values of 72.17, 4.29, 0.01 and 46.12, 2,55, 0.13 respectively, there was high bioaccu mulation of heavy metal in tissue system than in digestive system. The bioaccu mulation factor in fish tissue were 26.81, 0.10, and 0.01 for Cu, Fe, and Pb, while the bioaccumulat ion factor in the d igestive system were 15.93, 0.06 and 0.02 for Cu, Fe and Pb. The b ioaccumulat ion factor in tissue was higher than in d igestive system, th is suggest that the fish samp les could be used to monitor Cu, Fe, Pb pollution levels in owubu creek