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The purpose of the study was to investigate the effect of broodfish sex ratio on seed production of red tilapia, Oreochromis sp. using hapa nets suspended in an earthen pond. Sex ratios used in the experiment were 1:1 and 1:3 (male: female) with three replicates per treatment. Eight broodfish were placed in the hapa, each with a combination of either 4 male: 4 female or 2 male: 6 female to maintain the treatment sex ratios. Tilapia seeds (free swimming fry, sac-fry and eggs) were harvested every 21-day post-stocking. The broodfish were fed 3% of their body weight with a diet that contained 28% crude protein and 4% crude fat. Seed production of both sex ratio treatments were analyzed using the t-test. There were no significant differences (p>0.05) in seed production and female broodfish performance between the two sex ratios tested.
