After acclimation for 2 weeks, healthy
fish (50.43 ± 0.86 g) were selected and randomly stocked into 6 tanks
on June 17th. Each tank contained 30 fish and the biomass at the
beginning of the experimentwas 3 kgm−3
per tank. Pellet feed (Tongyi,
Taiwan) containing 46% crude protein was used.