Sex-Reversal Effect of Dietary Aloe vera (Liliaceae) on Genetically Improved Farmed Nile Tilapia Fry

作者：Gabriel, Ndakalimwe Naftal^*; Qiang, Jun; Ma, Xin Yu; He, Jie; Xu, Pao; Omoregie, Edosa

来源：North American Journal of Aquaculture, 2017, 79(1): 100-105.

DOI：10.1080/15222055.2016.1236046

• OREOCHROMIS-NILOTICUS
• STREPTOCOCCUS-INIAE
• FISH
• PHYTOANDROGEN
• PERFORMANCE
• AQUACULTURE
• GENISTEIN
• SAPONINS
• GROWTH
• GIFT

We evaluated the hypothesis that administering dietary Aloe vera to sexually undifferentiated fry of genetically improved farmed Nile Tilapia Oreochromis niloticus for 30 d would affect their sex ratio. Five experimental treatments were designed, including a control and 100% A. vera powder incorporated into the feed at 0.5, 1.0, 2.0, and 4.0%. After 30 d of feeding, the experimental diets were replaced with a commercial diet, which was administered to the fish for another 42 d to attain the size at which sex determination was possible. Based on logistic regression analysis, an increase in the A. vera inclusion level from 1.0% to 4.0% resulted in a significantly greater percentage of males compared to the control and the 0.5% A. vera inclusion level, with the 4.0% A. vera group presenting potent masculinization effects (67.62% male). However, the survival percentage among fish that received 4.0% A. vera was significantly lower than survival in the other groups. The present results indicate that A. vera extracts have the potential to be used as sex-reversal agents in Nile Tilapia culture, but additional studies are necessary.

• 出版日期2017
• 单位中国水产科学研究院; 南京农业大学; 中国水产科学研究院淡水渔业研究中心