Determine the Optimal Density of Nile Tilapia (<i>Oreochromis niloticus</i>) Fingerlings Cultured in Floating Cages

The objective of the study was to determine optimal density fingerlings Nile tilapia (Oreochromis niloticus) culture in floating cages with respect growth performance and know effect temperature on during winter period. Tilapia (mean weight 8.5 ± 0.36 g) were stocked at densities 120, 180 360 fish/m3 for 10 weeks. During culture, fish fed a diet contains 35% protein made peanut seed, cottonseed, wheat bran, Sorghum. results showed that increase reduced final fish. percentage increased reached 111% 1.45% lowest (120 fish/m3), 79% 1.87% medium (240 63% 2.03% high (360 therefore daily rate better density. food conversion ratio also 2.17 0.33, followed by 2.79 0.28 then highest 3.09 0.21. However, total production cage increasing density, return cost higher According various evaluation criteria, it can be concluded 240 is best growing cages. It observed rates three treatments low due decrease water most period, which may indicate useless season.