Four replicates were set for the experiment on each regime.
Twenty-four glass aquaria (45 cm×25 cm×3 0 cm, water volume:
35 L) were used for shrimp rearing. Each aquarium held five individuals
and was covered with a 5-mm thick screen (the screen is
laboratory-designed, which is wooden frame sandwiched with transparent
plastic net) to prevent the shrimp from jumping out. The
different light treatments (shaded from each other with black plastic
sheeting) were in one room where temperature was controlled
using an air conditioner.