Description

Abstract: Recently hatched tilapia fry 9 to 11 mm total length (TL) are preferred for hormonal sex reversal because they are most likely to be sexually undifferentiated. Thirty-three trials were conducted in Honduras between September 1988 and March 1990 to quantify the effect of water temperature on Oreochromis niloticus fry production in earthen ponds for hormonal sex reversal.Two 0.05-ha ponds were simultaneously stocked with brood fish in each trial; Generally, one pond was harvested after 17 days, the other after 20 days (range 16 to 21 days). Fry production was evaluated in relation to degree-days from the threshold temperature of 15