Working Document Series Open Access 2010 RUF-35035

Some aspects of reproductive biology of Oreochromis andersonii, Oreochromis machrochir and Oreochromis niloticus in ponds

N. ChimbaC. KancheyaAlexander Shula KefiK.G. KubirizaD.C. Mumba

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Abstract

98 words

The study on the reproductive biology of Oreochromis macrochir, O. niloticus and O. andersonii was carried out for sixty nine days in hapas. There were no significant (P > 0.05) differences in the number and weight of spawn incubated in the mouths of the three fish species although O. macrochir incubated the largest number of eggs with the lowest weight. However, it had longer (P < 0.05) eggs compared to other fish species. The brooding index for O. niloticus (5.04 ± 1.87%) was the lowest followed by O. macrochir (11.99 ± 3.59%) and O. andersonii (14.72 ± 5.13%).

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