The specific growth rate (SGR; % bw d−1) was estimated for each tank from the total tank biomass (kg) between two time points using the equation: SGR = 100 × (Ln(Wf) − Ln(Wi)) / time. Wf was the final total biomass in the tank at the end of each growth period, Wi was the total initial biomass in the tank at the start of the growth period, and time (days) was the duration of the growth period