@article{Ferdous:208687,
      recid = {208687},
      author = {Ferdous, Z. and Ali, M.M},
      title = {Optimization of hormonal dose during masculinization of  tilapia (Oreochromis niloticus) fry},
      journal = {Journal of the Bangladesh Agricultural University},
      address = {2011},
      number = {452-2016-35430},
      pages = {6},
      year = {2011},
      abstract = {The experiment was conducted to optimize the dose of  17α-methyl testosterone (MT) during masculinization of  tilapia
(Oreochromis niloticus) fry. Five treatments were  designed with various doses of hormone to find out the  most
effective one. The treatments were designated as T1 (0  mg MT/kg), T2 (40 mg MT/kg), T3 (50 mg MT/kg), T4 (60  mg
MT/kg) and T5 (70 mg MT/kg). MT was administered orally  by using nursery feed and Ethanol (as hormone  carrier
solvents) diet to tilapia fry for 28 days in hapa.  After completion of the trial period of 28 days nursing of  the
experimental fry was continued for further 2 months  with commercial feed. At the end of experiment the sex  ratio was
determined by examining gonad after dissecting  the fish. Growth performance was monitored by recording  the
morphometric characteristics i.e. weight gain (g),  average daily weight gain (g). The analysis of growth data  showed
significant variation in weight, % weight gain, SGR  (% /day) of fish among the different treatments. SGR  increases
with the increase of hormone dose. The present  study demonstrated that all MT receiving treatments showed  a
significantly (p<0.01) higher male proportion (94.28%)  than control (48.57%). The dose of 60 mg MT/kg of  feed
resulted in maximum male population (94.28%). The  result indicated that the optimum dose of MT hormone was  60
mg /kg with a feeding period of 28 days after hatching.},
      url = {http://ageconsearch.umn.edu/record/208687},
      doi = {https://doi.org/10.22004/ag.econ.208687},
}