Effect of Feed Type on Growth Performance and Sex Reversal of Nile Tilapia (Oreochromis niloticus)

Authors

  • Methawee Rodmongkoldee Division Fisheries, Department of Agricultural Technology, Faculty of Technology, Mahasarakham University
  • Wattana Leelapat

Abstract

This study was conducted to evaluate the effect of different feed type mixed with 17α-methyltestosterone 60 mg/kg of feed on growth performance and sex reversal of Nile Tilapia (Oreochromis niloticus). The experimental design was completely randomized design (CRD) with three treatments and 5 replicates. Fish were fed by hormone dry powder feed (treatment 1), hormone moist dough feed (treatment 2) and hormone sink powder feed (treatment 3) for the period of 21 days. The results at the end of the experiment showed that the sex ratio, average weight              and  ADG  of treatment 2 (94.8 ± 0.84% male, 0.21 ± 0.01 g/fish and 0.010 ± 0.0005 g/day respectively) and treatment 3 (96.0 ± 1.14 % male, 0.23 ± 0.02 g/fish and 0.011 ± 0.0010 g/day respectively) were significantly differences (P < 0.05) from treatment 1 (91.6 ± 2.79 % male, 0.16 ± 0.03 g/fish and 0.008 ± 0.0017g/day respectively). There were no significant differences (P > 0.05) in average length and survival rates between treatments. For water quality, parameters such as temperature, pH, dissolved oxygen and total ammonia in all treatments were not significantly different (P > 0.05). The results indicated that feeding hormone sink powder achieve the maximum sex reversal and growth performance. Keywords : Sex reversal, Nile tilapia, feed types

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Published

2017-01-10