Fingerling Production of Nile Tilapia (Oreochromis niloticus L.) in Hapausing Different SexRatios

Abstract

The study aimedto investigate the effects of different sex ratios of the Nile Tilapia (Oreochromis Niloticus L.) Broodstockon. It was produced under the conditions of hapa in a pond. Two Broodstock sex ratios: 1♂:3♀and 1♂:5♀were tested using the spawning Hapas, each measuring 2m3when suspended in an earthen pond. Broodstocks were stocked at a density of 8 fishes per 2m3equivalent to 24 fishes per treatment (1:3) and 12 fishes per 2m3equivalent to 36 fishes per treatment (1:5), respectively. The female broodstocks’ performance in terms of spawning rate was significantly different (P<0.05) while the Fry-produced fishes were insignificant (P>0.05) between treatments. Male and female Tilapia Broodstock survivalrates did not significantly (P>0.05) affect the experimental treatments and all treatments had a 100% survival rate. Water temperature that was observed in the study was in the range of 26-27.5 °C which affected the low spawning rate and low fry production of tilapia breeders. The present study concludedthat the 1:3 sex ratio is considered an ideal sex ratio in the Nile Tilapia reproduction. The study attemptedto give information on the fingerling production rate of Nile Tilapia (O. Niloticus) using thesex ratios of 1♂:3♀and 1♂:5♀in supporting and meeting the local demand of grow-out operators; thereby, increasing the supply of fish.