Experimental design and fish stocking. Juvenile Thai climbing perch fry were collected from a local hatchery. After proper conditioning in lake water for 24 hours, fries were stocked randomly in cages at early morning of the following day according to prior fixed stocking density. The experimental design comprised with four stocking densities such as 40 fish m-3, 60 fish m-3, 80 fish m-3, 100 fish m-3 denoted as T1, T2,