Abstract

This study was conducted to investigate the influence of environmental factors such as water temperature, rearing density, food organism and feeding amount on the growth and survival of spat in surf clam, Tresus keenae. As a result of this study, the optimum conditions of spat rearing were as follows. The optimum range of water temperature is 22℃ to 25℃, the optimum rearing density is 500 ind./cm2 and the supply of mixed feed organism for spat rearing such as Isochrysis galbana, Chaetoceros simplex and Tetraselmis suecica is 50 × 104 cells/ml-100 × 104 cells/ml. The results of this study suggest that the optimum conditions of environmental factors in spat rearing of Tresus keenae contribute to productivity improvement through rapid growth and high survival.