Heavy Metals (Pb, Cu, Fe, and Zn) Level in Shellfish (Etheria elliptica), Water and Sediments of River Ogbese, Ondo State, Nigeria

Investigations on the accumulation of heavy metals in water and sediments of river Ogbese were carried out between December 2010 and February 2011 using Atomic Absorption Spectrophotometer. Etheria elliptica a sessile organism was also used to determine the concentration of heavy metal in the aquatic environmental. In water, Cu had the highest concentration (0.55 – 0.13 mg/l ±0.1) while in sediments, the highest value obtained was in Fe (1.46-3.89mg/l±0.27). The minimum concentrations recorded were in Pb; which was below detectable level. The result also revealed that the shell accumulate more heavy metals than the flesh of the mussel with Cu in the shell exhibiting a negative correlation with all the metals in the flesh. However, the condition factor (K) value is 6.44, an indication of good health. The length-weight relationship is expressed as W = -0.48 x L 1.94 (r2 = 0.29) showing the growth pattern to be negatively allometric.

Authors:

• O. O. Olawusi-Peters
• O. E. Aguda
• F. O. Okoye

Keywords:

• Condition factor
• Etheria elliptica
• heavy metals
• River Ogbese.

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