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Metal pollution is of global concern due to toxicity effects. This study assessed heavy metal concentrations in sediment and a species of shrimp, Farfantepenaeus notialis, from Lagos and Epe Lagoons in Nigeria between May and October 2017. Significant variation (p<0.05) was observed between the sampling sites for a number of physicochemical parameters (pH, salinity, transparency and conductivity). The recorded mean salinity value of 15.20±2.75 ‰ (Lagos Lagoon) is typical of an estuary while 0.98±0.05 ‰ (Epe Lagoon) is typical of a freshwater body. Significantly higher values (mg·kg-1) of lead (0.04±0.03) and zinc (1.45±0.24) were obtained in sediment of Epe Lagoon when compared to the lead (0.02±0.08) and zinc (0.85±0.03) of Lagos Lagoon sediment. All examined heavy metals were found in the crustacean samples in varying and sometimes very low, but measurable concentrations. The fact that some level of bioaccumulation was found in the examined crustacean is a cause for constant monitoring of the lagoons to eliminate any health risk.
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