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Cadmium, Copper, Lead and Zinc Tissue Levels in Bonga Shad (Ethmalosafimbriata) and Tilapia (Tilapia guineensis) Caught from Imo River, Nigeria

Etesin, Usoro M. and Benson, N. U. (2007) Cadmium, Copper, Lead and Zinc Tissue Levels in Bonga Shad (Ethmalosafimbriata) and Tilapia (Tilapia guineensis) Caught from Imo River, Nigeria. American Jomnal of Food Technology, 2 (1). pp. 48-54. ISSN 1557-4571

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Abstract

An investigation of the muscle-liver tissue concentrations of heavy metals (Cd, Cu, Pb and Zn) in two commercially important fish species (EthmalosafimbriataBonga shad and Til apia guineensis-Tilapia) caught from three stations within Irno River was carried out in 2004. Heavy metal contents varied significantly (p>0.05) depending on the fish species and on the type of tissues. The concentrations of the essential elements (Zn, Cu) were relatively higher in the muscle and liver tissues than the non-essential metals (Pb, Cd). The trends in tissue elemental concentrations in both species of fish was Zn>Cu>Pb>Cd. Heavy metal levels in liver tissues of both fish species were comparatively higher than levels obtained from muscle tissue. In general, T. guineensis showed higher levels of metal concentrations thanE. fimbriata. The concentrations of Cu, Cd, Pb and Zn in both fish species were within tolerance limits that are safe for human consumption.

Item Type: Article
Uncontrolled Keywords: Heavy metal accumulation, Ethmalosafimbriata, Tilapia guineensis, Imo river
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 05 Feb 2016 10:38
Last Modified: 05 Feb 2016 10:38
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/5854

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