Use of fluoxymesterone to induce sex reversal in the Swordtail (Xiphophorus helleri)
2001
Hatairat Saowakoon | Samnao Saowakoon | Kittikorn Jindapol (Rajamangala Inst. of Technology. Surin Campus, Surin (Thailand))
Study of hormone application for sex reversal induction in the Swordtail (Xiphophorus helleri) was conducted at the Fisheries Department of the Rajamangala Institute of Technology, Surin campus, from July to September, 2000. The experiment was designed using a 4*2 factorial arrangement in completely randomized design. Four concentration of fluoxymesterone were mixed with artificial feed at 0, 50, 100 and 150 mg hormone/kg of feed. The treatment initiated at 1 day of age. Treatment periods were 20 and 40 days. All fishes of each treatment were raised in 30 liter tanks and fed 3 times daily to satiation. After 90 days of experimental period, percentages of similar male were effected by concentration levels and feeding regimes. All other regimes could produce 100 percent similar male with nonsignificant difference among groups (P0.05). However, the percentage of similar male in all groups of fishes fed with hormonal feed was significantly higher than the control (P0.05), because the control group was similar female. Survival rate of all treatments averaged 78.57-86.44 percent which were not significant difference (P0.05). For economic consideration, mixing with 50 mg hormone/kg feed was the appropriate application to induce sex reversal.
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