All experiments were conducted in 45 L aquaria. Fish weighing 10±1 g were placed
in the aquaria (10 fish per aquarium) 24 h prior to the experiments. Feed was supplied
twice daily at a rate of 5% of fish body weight per day. On the day of stocking, the fish
were fed the aforementioned commercial fish feed. Subsequently, the fish were fed
prepared supplemented feeds (see Preparation of fish feeds). Aquaria were cleaned
daily by siphoning off two-thirds of the water and replacing it with fresh water