The Progressive Fish-Culturist · 1991 · 29 citations · 0 references
Natural ResourcesAnimal SciencesFisheriesAquacultureFish BiologyIchthyologyAquaculture SystemsFish GrowthFisheries ProductivityFreshwater AquacultureGrowth DynamicsAnimal Weight GainAquaculture Feed ManagementAquatic Water ExchangeExtensive Aquaculture SystemsFish Growth PerformanceGrowth BiometricsPond Fish Stocking ManagementPond Stocking Density Design
Abstract Growth of male Nile tilapias (Tilapia nilotica) in cages of three submerged volumes (0.64, 0.83, or 1.25 m3) were compared in four 0.12-hectare ponds stocked with noncaged Nile tilapias at rates of either 50,000 swim-up fry or 3,000 fingerlings/hectare. All cages were stocked at a rate of 250 fish/m3, and only caged fish were fed. Rate of weight gain (g/fish per day) of caged fish over 20 weeks was greater in ponds with the lower number of noncaged fish. Among the range of cage sizes tested, water exchange did not appear to be different. Rate of weight gain of caged fish tended to increase with increasing cage size, apparently as a result of decreasing feed loss.