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Fish communities of a perturbed stream in Southern Nigeria

Published online by Cambridge University Press:  10 July 2009

Reginald Victor  and
Jacob Odenkey Tetteh
Reginald Victor
Affiliation:
Department of Zoology, University of Benin, PMB 1154, Benin City, Nigeria, West Africa
Jacob Odenkey Tetteh
Affiliation:
Department of Zoology, University of Benin, PMB 1154, Benin City, Nigeria, West Africa
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Abstract

Fish communities of a fourth order stream impounded by a weir were studied in Southern Nigeria. Fifty-eight species were recorded of which 90% occurred upstream while reservoir and downstream accounted for 48% and 43% respectively. The distribution of some fish families indicated the effects of habitat alterations caused by reservoir and downstream conditions. The fauna upstream was different from that of reservoir and downstream. Relative abundance of non-cichlids common to reservoir and downstream showed 42% similarity. The longitudinal distribution of three non-cichlid populations was different in reservoir and downstream. Non-cichlid species richness was almost similar in reservoir and downstream, but its general diversity and evenness were higher in reservoir than its downstream. Fish community changes in this stream are discussed.

Keywords

AfricacommunitiesfishNigeriaperturbationsreservoirstreamtropics
Type
Research Article
Information
Journal of Tropical Ecology , Volume 4 , Issue 1 , February 1988 , pp. 49 - 59
Copyright
Copyright © Cambridge University Press 1988

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