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ABSTRACT
This work was carried out to determine the levels of heavy metals (Fe, Cu, Mn and Ni) in fish, sediments and water from a flood reservoir at Useh Community in Egor LGA, Edo State. The samples were collected from three different points and the Atomic Absorption Spectrophotometer (AAS) was used to analyze metals in the water, sediment and fish. Mean metals were compared at 5% level of significant using ANOVA and the DMRT for further separation of means. The analysis carried shows the presence of all the metals except nickel which was not detected in any of the samples. The highest average concentration of metals was recorded in sediments. The concentration of iron recorded in sediments, water and fish were; 34.90mg/l, 9.55mg/l, and 7.00mg/l respectively. For manganese it was; 1.41mg/l, 0.5mg/l, and 0.42mg/l, while for copper it was; 0.04mg/l, 0.04mg/l, and 0.03mg/l. From this study, the levels of nickel and copper were below the permissible limit of 1.0mg/l and 2.0mg/l according to WHO thus not posing a threat to the consumers of the fish. However, iron and manganese were found to be above the acceptable limit of 3mg/l and 0.4mg/l respectively. It is therefore recommended that iron and manganese be accessed continuously and the fish be harvested from this reservoir to prevent contamination that may arise from bioaccumulation/biomagnifications of these metals over a long period of consumption.
