Our results prove the possibility of skewing the red tilapia into
phenotypic males using heat-shock induction of triploidy. Comparatively higher percentage of males (84.1%) observed in heat-shocked
triploids resulted in higher yield (209.5 ±5.9 g), when the average
weight of each group was calculated. Previously,Mol et al. (1994)
suggested that the induction of triploidy showed no significant effect
on the growth of females and males individually, but it altered the sex
ratio and therefore the growth rate of the whole population.