alexa Assessment of Trace Metal Levels in Fish Species of Lagos Lagoon
ISSN: 2376-1318

Vitamins & Minerals
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Research Article

Assessment of Trace Metal Levels in Fish Species of Lagos Lagoon

Akan B. Williams* and Abiola R. Edobor-Osoh
Environmental Chemistry Research Group, Department of Chemistry, Covenant University, Nigeria
Corresponding Author : Akan B. Williams
Environmental Chemistry Research Group
Department of Chemistry
Covenant University, Ota, Nigeria
E-mail: [email protected]
Received November 12, 2012; Accepted December 15, 2012; Published December 22, 2012
Citation: Williams AB, Edobor-Osoh AR (2013) Assessment of Trace Metal Levels in Fish Species of Lagos Lagoon. Vitam Trace Elem 2:109. doi:10.4172/2167-0390.1000109
Copyright: © 2013 Williams AB, 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 source are credited.
 

Abstract

Fish species, surface water, bottom water, epipellic and benthic sediments were collected from Oworonshoki, Lagos lagoon, to determine their trace metal levels using atomic absorption spectrophotometer. The fish species collected were Tilapia guineensis, Chrysichthys nigrodigitatus, Liza grandisquamis and Psettias sebae. The results indicated that the highest concentrations of trace metals were present in the fish species, followed by benthic sediments, epipellic sediments, bottom water, and surface water. Levels of trace metals found in males and females of fish species showed significant differences. The female species, except Tilapia guineensis, accumulated higher Fe and Zn values. The female species of Psettias sebae was a good bio-indicator of trace metal contamination in the lagoon. Cd and Ni were not detected in any of the fish species. Pb levels in the fishes were above the maximum acceptable limit for human consumption, and could have been sourced from the discharge of industrial wastes into the lagoon. The levels of Fe and Zn in the water, sediment and fishes were all within acceptable limits. The highest condition factor of 2.76 was observed in the female of Chrysichthys nigrodigitatus, while the female, Psettias sebae, had the least condition factor of 0.57, correlating with its high metal contamination.

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