Journal of Cell and Animal Biology
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Article Number - 3E6839214926


Vol.7(9), pp. 116-120 , September 2013
DOI: 10.5897/JCAB2013.0388
ISSN: 1996-0867



Full Length Research Paper

Reproductive biology of Oreochromis niloticus in Lake Beseka, Ethiopia


Lemma Abera Hirpo




Zwai Fishery Research Center, P.O. Box 229, Zwai, Ethiopia


Email: negrofarm@yahoo.com






 Accepted: 22 July 2013  Published: 30 September 2013

Copyright © 2013 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


Reproductive biology of Oreochromis niloticus in Beseka was studied. Samples of O.niloticus were collected monthly during September 2010 to August 2011 using different centimeter mesh sizes of gillnets. The relationship between total length and total weight was curvilinear and sex ratio was different throughout the sampling periods. The 50% sexual maturity length (L50) was estimated at 14 cm TL for females and 17 cm TL for males. Estimated fecundity was linearly related with total length and total weight of the fish. Absolute fecundity was estimated in number and range from 125 to 251 with a mean of 161 ± 2.5. The frequency of ripe gonads suggested that O. niloticus in Lake Beseka breeds throughout the year and intensive breeding coincided with the rainy seasons.

 

Key words: Breeding season, length-weight, Oreochromis niloticus, sex ratio, fecundity, Lake Beseka.

 

 

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APA (2013). Reproductive biology of Oreochromis niloticus in Lake Beseka, Ethiopia. Journal of Cell and Animal Biology, 7(9), 116-120.
Chicago Lemma Abera Hirpo. "Reproductive biology of Oreochromis niloticus in Lake Beseka, Ethiopia." Journal of Cell and Animal Biology 7, no. 9 (2013): 116-120.
MLA Lemma Abera Hirpo. "Reproductive biology of Oreochromis niloticus in Lake Beseka, Ethiopia." Journal of Cell and Animal Biology 7.9 (2013): 116-120.
   
DOI 10.5897/JCAB2013.0388
URL http://academicjournals.org/journal/JCAB/article-abstract/3E6839214926

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