Optimal salinity required for the larval development of two grapsid crabs, Helice leachi Hess and H. formosensis Rathbun

抄録

Larvae of two grapsid crabs, Helice leachi Hess and H. formosensis Rathbun were reared under nine different salinities in the laboratory. The larvae survived to the megalopa stage in 10 to 30 ppt for H. leachi and 15 to 35 ppt for H. formosensis. The best survival of H. leachi to the zoeae (80%) and megalopa (90%) occurred in 20 and 15ppt respectively, at 24-C. In contrast, 30 and 20 ppt showed the highest survival of zoeae (100%) and megalopa (100%) for H. formosensis at 22℃.