Six isocaloric diets (19 kJ g−1) were formulated where diet 1 was 40% fishmeal based control diet (FM). Diets 2 to 6 were prepared as follows, by replacing 60% fishmeal
protein with a plant protein blend (soybean meal and canola meal; 6:4) alone (PP); protein blend and 1.5% CAA
(PAA); protein blend and 0.04% phytase (2000 FTU kg−1) (PPT); protein blend and 10% FS (PFS); and protein blend and a mixture of CAA, phytase and FS (PMX) respectively. Triplicate groups of shrimp (1.75 ± 0.40 g;mean initial body weight ± SD) were stocked in 54–l rectangular tanks at a rate of 15 shrimp per tank