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Int. J. Environ. Res. Public Health 2011, 8(11), 4332-4352; doi:10.3390/ijerph8114332
Article

Assessment of Water Quality in Asa River (Nigeria) and Its Indigenous Clarias gariepinus Fish

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Received: 27 September 2011; in revised form: 15 November 2011 / Accepted: 16 November 2011 / Published: 18 November 2011
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Abstract: Water is a valued natural resource for the existence of all living organisms. Management of the quality of this precious resource is, therefore, of special importance. In this study river water samples were collected and analysed for physicochemical and bacteriological evaluation of pollution in the Unity Road stream segment of Asa River in Ilorin, Nigeria. Juvenile samples of Clarias gariepinus fish were also collected from the experimental Asa River and from the control Asa Dam water and were analysed for comparative histological investigations and bacterial density in the liver and intestine in order to evaluate the impact of pollution on the aquatic biota. The water pH was found to range from 6.32 to 6.43 with a mean temperature range of 24.3 to 25.8 °C. Other physicochemical parameters monitored including total suspended solids, total dissolved solids, biochemical oxygen demand and chemical oxygen demand values exceeded the recommended level for surface water quality. Results of bacteriological analyses including total heterotrophic count, total coliform and thermotolerant coliform counts revealed a high level of faecal pollution of the river. Histological investigations revealed no significant alterations in tissue structure, but a notable comparative distinction of higher bacterial density in the intestine and liver tissues of Clarias gariepinus from Asa River than in those collected from the control. It was inferred that the downstream Asa River is polluted and its aquatic biota is bacteriologically contaminated and unsafe for human and animal consumption.
Keywords: Asa River; physicochemical parameters; histological; water quality; pollution Asa River; physicochemical parameters; histological; water quality; pollution
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kolawole, O.M.; Ajayi, K.T.; Olayemi, A.B.; Okoh, A.I. Assessment of Water Quality in Asa River (Nigeria) and Its Indigenous Clarias gariepinus Fish. Int. J. Environ. Res. Public Health 2011, 8, 4332-4352.

AMA Style

Kolawole OM, Ajayi KT, Olayemi AB, Okoh AI. Assessment of Water Quality in Asa River (Nigeria) and Its Indigenous Clarias gariepinus Fish. International Journal of Environmental Research and Public Health. 2011; 8(11):4332-4352.

Chicago/Turabian Style

Kolawole, Olatunji M.; Ajayi, Kolawole T.; Olayemi, Albert B.; Okoh, Anthony I. 2011. "Assessment of Water Quality in Asa River (Nigeria) and Its Indigenous Clarias gariepinus Fish." Int. J. Environ. Res. Public Health 8, no. 11: 4332-4352.



Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert