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Cages made of synthetic netting can either be floating or stationary in calm water in bays, lagoons or fishponds. Sites for installation of the nursery cages should be as far as possible free from biofouling because nursery cages are made of very small mesh size nettings which can be easily covered prevents water exchange. The cages are up by big-foulers and thus cages are normally supported by frame and by floating bouys made of bamboo or styrofoam drums. Stationary cages are held up by bamboo or wooden poles. Postlarvae (PL6-7) is suitable for stocking in cages at a stocking density of 1000-2000 per cubic meters of water. Feeding scheme is similar to that in earthen pond nursery (Kungvankij et al., 1986). |