Research Article
Bioconcentration of Trace Metals in the Freshwater Snail Melanoides tuberculata (Mollusca: Thiaridae) from Alaro Stream Ecosystem of South West Nigeria
Emmanuel Teryila Tyokumbur* and Tonye Grace OkorieDepartment of Zoology, University of Ibadan, Ibadan, Nigeria
- *Corresponding Author:
- Emmanuel Teryila Tyokumbur
Department of Zoology
University of Ibadan, Nigeria
E-mail: e.tyokumbur@mail.ui.edu.ng
Received date: March 30, 2013; Accepted date: May 20, 2013; Published date: May 22, 2013
Citation: Tyokumbur ET, Okorie TG (2013) Bioconcentration of Trace Metals in the Freshwater Snail Melanoides tuberculata (Mollusca: Thiaridae) from Alaro Stream Ecosystem of South West Nigeria. J Ecosys Ecograph 3:124. doi:10.4172/2157-7625.1000124
Copyright: © 2013 Tyokumbur ET, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and and source are credited.
Abstract
The level and tissue bioconcentration of V, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd and Pb were determined in the viscera and shell of the freshwater snail, Melanoides tuberculata in the upstream and downstream of Alaro stream, South West Nigeria. Trace metal concentrations in snail and sediment samples collected from six stations were measured using an Inductively Coupled Plasma-Mass Spectrometry (ICP-MS).
The mean trace metal concentrations (ppm) of V, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd and Pb in the snail were estimated to be 2.10-3.26, 28.31-33.32, 1668.21-2398.43, 1.75-3.98, 6.18-8.12, 33.86-89.23, 12.10- 66.35, 0.78-0.96, 9.86-11.35, 1.44-1.73, 1.98-2.33, 2.88-3.22 and 10.12-14.12 respectively. The study shows that M. tuberculata is capable of bioconcentrating trace metals in magnified quantity than that found in the sediment. The tissue concentration pattern was correlated with the amount of trace metals in the sediments. Bioconcentration of the trace metals V, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd and Pb varied between the viscera and the shell with the viscera having the highest concentration of all the trace metals. Results of the study indicate that ingestion of sediments and algae may be the main uptake route of the trace metals in Melanoides tuberculata.
