Morphological Variation of Cichlids From Kainji Lake, Nigeria By  

Olufeagba S.O.1 , Aladele S.E.2 , Okomoda V.T.1 , Sifau M.O.2 , Ajayi D.A.2 , Oduoye O.T.2 , Bolatito O.A.2 , Nden D.S.2 , Fabunmi-Tolase A.S.2 , Hassan T.2
1. Department of Fisheries and Aquaculture, University of Agriculture Makurdi, Nigeria
2. National Centre for Genetic Resources and Biotechnology, Ibadan, Oyo State, Nigeria
Author    Correspondence author
International Journal of Aquaculture, 2015, Vol. 5, No. 26   doi: 10.5376/ija.2015.05.0026
Received: 25 May, 2015    Accepted: 27 Jun., 2015    Published: 19 Aug., 2015
© 2015 BioPublisher Publishing Platform
This is an open access article published under the terms of 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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Olufeagba S.O., Aladele S.E., Okomoda V.T., Sifau M.O., Ajayi D.A., Oduoye O.T., Bolatito O.A., Nden D.S., Fabunmi-Tolase A.S. and Hassan T., 2015, Morphological Variation of Cichlids From Kainji Lake, Nigeria By, International Journal of Aquaculture, 5(26): 1-10

Abstract

This study was designed to evaluate morphological variations of cichlids from the Kainji lake, Niger State in Nigeria. 200 samples of cichlids comprising four species (Oreochromis niloticus, Tilapia zilli, Pelmatolapia mariae and Sarotherodon galilaeus) were collected from the lake and a total of thirty morphometric measurements and meristic counts were recorded. Data was corrected to eliminate size effect on sample and subjected to discriminant function analysis to determine rate of divergence among species. Results obtained revealed significant variation in some morphometric parameters measured and all six meristic counts recorded. Growth pattern revealed negative allometric growth for O. niloticus (2.29), T. mariea (0.72) and S. galilaeus (2.47) while T. zilli, had a positive allometric growth. Discriminant analysis showed some levels of overlap across species for both morphometric measurement and meristic count. Interspecific distance was closest between T. zilli and O. niloticus (14.70) while the farthest distance was recorded between T. zilli and S. galilaeus (52.40). The observable overlap among species despite morphometric and  genetic differences may have been as a result of similar species adaptations in response to the prevailing environmental conditions.

Keywords
Tilapia; Lake; Morphometric parameters; Meristic count; Man made lake
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