Différenciation morphologique entre deux souches naturelles et une souche cultivée du tilapia du Nil Oreochromis niloticus (Linnaeus, 1758) au Sud-Kivu, RD Congo

Morphological variation between two wild populations of Nile tilapia Oreochromis niloticus from Lake Kivu and Ruzizi River respectively and a breeding strain (Nyakabera strain) of the same species was studied by a multivariate analysis of 21 morphometric characters and 4 meristic characters. Princip...

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Bibliographic Details
Published inInternational journal of innovation and applied studies Vol. 27; no. 1; pp. 323 - 336
Main Authors Fakage, John Nihoreye, Mulungula, Pascal Masilya, Mwapu, Pascal Isumbisho, Onawoma, Freddy Okitayela
Format Journal Article
LanguageFrench
Published Rabat International Journal of Innovation and Applied Studies 01.08.2019
Subjects
Aquaculture
Catfish
Cluster analysis
Discrimination
Divergence
Fish
Geography
Morphology
Multivariate analysis
Ponds
Populations
Principal components analysis
Tilapia
Lake Kivu
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Summary:Morphological variation between two wild populations of Nile tilapia Oreochromis niloticus from Lake Kivu and Ruzizi River respectively and a breeding strain (Nyakabera strain) of the same species was studied by a multivariate analysis of 21 morphometric characters and 4 meristic characters. Principal component analysis and cluster analysis of morphometric characters showed divergence between populations/strains while the same approach with meristic traits didn't show discrimination between them. These results show that based on the morphometric traits, the two populations of Lake Kivu and Ruzizi River are close to each other and stand out from the Nyakabera strain. The morphological differences thus noted could be due to environmental factors or genetic differences or both combined, in relation to the geography and the life history of these O. niloticus populations considered.
ISSN:2028-9324