Gonadal State and Condition Factor of Oreochromis Niloticus (Linnaeus 1758)in a Hypereutrophic Lake
Journal of Water Resources and Ocean Science
Volume 2, Issue 6, December 2013, Pages: 165-169
Received: Sep. 18, 2013; Published: Nov. 10, 2013
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Authors
Beaven Utete, Chinhoyi University of Technology, Department of Wildlife and Safari Management P. Bag 7724, Chinhoyi
Edmore Happison Chikova, Chinhoyi University of Technology, Department of Wildlife and Safari Management P. Bag 7724, Chinhoyi
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Abstract
Condition factor, sexual maturity and length-weight relationship of 1132 Oreochromis niloticusinhabiting the hypereutrophic Lake Chivero in Zimbabwe were studied. Fish samples were collected through gill netting and from selected commercialfisheries around the lake from February - November 2011. Comparative analysis of age and size at maturity revealed that the O. niloticus reached maturity at 30±2.5 mm males and 50±3.6 mm females in total length. There was a significant difference in sexual maturity in both sexes with the inactive (I) stage more frequent. Both sexes of fish indicated a negative allometric increase in weight.August and November were determined as the most intensive and sensitive breeding periods for O. niloticus in Lake Chivero.Fishing activities in the lake need to be regulated in tandem with the breeding cycles of the O. niloticus.
Keywords
Allometric Growth,Maturity Stage, Oreochromis Niloticus, Pollution
To cite this article
Beaven Utete, Edmore Happison Chikova, Gonadal State and Condition Factor of Oreochromis Niloticus (Linnaeus 1758)in a Hypereutrophic Lake, Journal of Water Resources and Ocean Science. Vol. 2, No. 6, 2013, pp. 165-169. doi: 10.11648/j.wros.20130206.12
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