Early sex reversal during embryonic development in the Nile tilapia

Rougeot C., Kanfitine S.Y., Prignon C., Gennotte V., Mélard C.

Date de parution: juillet 2008
Volume: 32
Number: 2 suppl.
Pagination: 104-105
Editeur: Société Française d'Ichtyologie
doi: https://doi.org/10.26028/cybium/2008-322SP-045

The aim of this work was to study the effect of hormonal sex-reversal treatment during embryonic development of Nile tilapia. XX and XY embryos were incubated in 17 α-methyltestosterone or in 17α-ethynylestradiol during embryonic development. Mean survival rates of embryos 5 days post-hatching ranged from 13.1% to 63.9%. XY embryos incubated in E2 displayed a significant proportion of females (from 50.6 to 79.0%) and XX embryos incubated in MT a significant proportion of males (from 9 to 15%). Our results proved the effectiveness of hormonal sex reversal treatment during embryonic development, as well as precocious sensitivity to hormonal treatments.

Mots-clés: 17α-ethynylestradiol - 17α-methyltestosterone - Sex differentiation - Sex reversal - Tilapia
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