Influence of sexual phenotype and genotype, and sex-ratio on growth performances in tilapia, Oreochromis niloticus

Abstract

In tilapia, precocious sexual maturity associated with continuous and asynchronous reproductive activity often results in unwanted reproduction and overcrowding in ponds where the food supply is limited. This constitutes a major limitation in the culture of most tilapia species. Furthermore, divergent growth performances linked to sex are regularly observed. Males present better growth performances than females. The first experiment of the present study analysed the influence of sexual genotype on phenotypic male growth rates. Males with three different sexual genotypes were produced. The objectives of the second experiment were to study the influence of social interactions through the use of different sex ratios. These two experiments were carried out in hapas implanted in pond with \"Egypt-UCS\" strain of Oreochromis niloticus.

Citation

Aboubacar, T.; Toguyeni, A.; Benoît Fauconneau, B.; Fostier, A.; Mair, G.C.; Baroiller, J.F. Influence of sexual phenotype and genotype, and sex ratio on growth performances in tilapia, Oreochromis niloticus. Aquaculture (2002) 207 (3-4) 249-261. [DOI: 10.1016/S0044-8486(01)00747-5]

Influence of sexual phenotype and genotype, and sex-ratio on growth performances in tilapia, Oreochromis niloticus

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