農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

將YY超雄性種魚與變性XY雌魚配對、繁殖。產出之魚苗共768尾，魚苗分成3組，每組256尾，A及B組投與含100ppm 17α-ethynylestradiol 雌性素之鰻魚練餌飼料，A組連續投餌45天，B組連續投餌60天，C組為對照組投與正常之鰻魚練餌飼料。變性後移至室外水泥池改用市售鱸魚飼料繼續飼養，截至測定時，A組平均體重約195.3g，其中雌魚141尾，雄魚61尾，合計202尾，變性率為69.8％，畸形率為13.4％；B組平均體重約198.6g，其中雌魚165尾，雄魚39尾，合計204尾，變性率為80.9％，畸形率為21.1％，雌魚生殖腺均尚未成熟，繼續養成中；C組為對照組，平均體重約217.8g，合計232尾都是雄魚，雄性率為100％，且無畸形現象。

Feminization of the Nile tilapia (Oreochromis niloticus) fry, reproduced by male YY crossed with female-reversed XY, was implemented.
768 fry were divided into 3 groups, each 256 fry, group A and group B were fed with eel feed mixed with 100 ppm 17α-ethynylestradiol, group A lasted for 45 days and group B for 60 days, group C was a control.
After feminization, the fish were fed with perch feed only. For fish of group A, mean body weight was 195.3g, with 141 females and 61 males, sex-reversed rate of 69.8%, deformity rate of 13.4%, in group B, mean body weight was 198.6g, with 165 females and 39 males, sex-reversed rate of 80.9%, deformity rate of 21.1%; the female fish were stocked for maturity. As for the control group, mean body weight was 217.8g, with all 232 males, no deformity.