Diets were mixed, pelleted and stored at −20 °C until use. Each diet was randomly assigned to one treatment with four barrels and each barrel was stocked with 35 shrimps. During the experiment, water temperature was kept at 30 ± 2 °C, pH 7.9–8.1 and salinity 6–7‰ with constant oxygenation. Uneaten food and excreta were removed every 3 days. Shrimps were fed 3 times each day at 8:00, 14:00 and 21:00 h for 8 weeks