Aquatic Sciences and Engineering, vol.34, pp.14-21, 2019 (International Refereed University Journal)
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.