3.1. Feeding rate and nutrients added to experimental
units
The mean rates of feed consumption and mean
value of feed nutrients added to treatments are
reported in Table 2.
3.2. Nutrient recovery by biomass of fish in different
treatments
The mean percentage of feed nutrients recovered
by red tilapia biomass (75 fishes) is listed in Table
2. These data show that the 120-g fish group
recovered higher Zn, Fe, and K compared to other
fish groups. The retention of Cu, Ca, and Mg in