Effects of 17ß-estradiol Hormone on Growth and Sex Differentiation in the Mozambique Tilapia (Oreochromis mossambicus, Peters, 1852)

Year 2019, Volume: 34 Issue: 1, 14 - 21, 07.01.2019

Karl Christofer Kingueleoua Koyakomanda Muamer Kürşat Fırat Cüneyt Süzer Serhat Engin Müge Hekimoğlu , Hülya Sayğı Osman Özden Fatih Güleç , Şahin Saka

https://doi.org/10.26650/ASE2018500686

Abstract

In this study, the effects of 17-ß-estradiol hormone on the zootechnic performances and sex ratio of Mozambique Tilapia (Oreochromis mossambicus. Peters, 1852) fry were investigated in order to initially produce functional phenotypical females and then super males. To this end, different E2 concentrations (50, 100, 150 and 200 ppm) were tested over a period of 45 days in a closed recirculating system. The evaluations showed that the female ratio was significantly (p value= 0.04 and α=0.05) higher in all treatment groups ranging from 61.90% to 86.36% compared to the control group. Growth was significantly higher (F value=22.78 and p value=0.00) in the control group compared to the treatment ones.

Keywords

Mozambique tilapia, Oreochromis mossambicus, 17ß-estradiol hormone, sex difference

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