The effect of Moina sp. immersion with 17alpha-methyl testosterone (17MT) on growth performances and sex reversal of Nile tilapia
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Abstract
The results found that Moina sp. immersion with 17alpha-methyl testosterone (17MT) has a non-effect on the growth performances and non-effect on the sex reversal of Nile tilapia. The higher length, weight, and specific growth rate were found in the PC (PC: 60 mg17MT/kg mixing commercial feed) and the NC (only commercial feed without 17MT) than in other groups (50 and 100 mg17MT/l immersing Moina sp.). The length and the weight of the PC and NC groups showed no significant difference. But these groups were different from the groups of 50 and 100 mg/l. The average length of the PC, NC, 50, and 100 mg/l were displayed at 2.67±0.08, 2.86±0.17, 1.45±0.07 and 1.46±0.02 cm, respectively. The average weight of the PC, NC, 50, and 100 mg/l was displayed as 0.40±0.07, 0.51±0.08, 0.08±0.10 and 0.07±0.01 g, respectively. The highest specific growth rate was found in the NC group (2.37±0.00%). The survival rate of the NC group was not significantly different from other groups. 17MT does not affect growth performances in the larval stage. However, dried Moina sp. immersion in 17MT could be caused an effect on growth performances and sex reversal.
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