We studied that the effect of stocking density on growth and survival rate of the scallop, Chlamys farreri (initial shell height 32.97 mm and total weight 5.63 g) from June 2002 to October 2003 in the west coast of Korea. C. farreri is usually the west coast of Korea and northern China in the natural habitat of the coastal species. Range of surface water temperature in the study area was 4.3℃ to 25.3℃, salinity 29.2 psu to 32.1 psu, dissolved oxygen 5.32 mg/L to 7.51 mg/L and pH was 7.84 to 8.12, respectively. The stocking densities were 20, 30, 40 and 50 individuals per a compartment of suspension cage in culture beginning. After 16 months from initiation, ranges of shell height and mean total weight were from 64.35 mm to 76.23 mm and from 41.53 g to 64.85 g. The survival rate was from 82% to 100%. The growth rate of the scallop was negatively correlated with the stocking density. The growth of the shell height and total weight were decreased with decreasing of water temperature. Most of mortality of scallop occurred during March to April and September to October. Survival rate in the stocking density was decreased by density increase and was highest in 20 individual a compartment.

We studied that the effects of mesh size and material of cages on the growth of C. farreri (initial shell height 38.6 mm and shell total weight 7.2 g) held in suspension cage from September 2005 to October 2006. The experiment was performed with two mesh sizes (1 cm and 2 cm) and two materials (net and plastic) of cages in same densities. After 13 months from culture beginning, ranges of shell height and total weight were from 69.7 mm to 73.9 mm and from 36.1 g to 47.0 g, respectively. The survival rate was from 93% to 100%, respectively. The growth rates of the scallop were positively correlated with the mesh size. In the growth rate according to culture material, the growth of scallop in the plastic cage was faster than that in the net cage from September 2005 to June 2006, but the growth in the plastic was slower than that in the net cage for obstruction by attaching organisms from June to October 2006.