Preliminery Study on Tolerance of Mitten Crab Larva to Salinity Variations

Observations were made on the tolerance of mitten crab larvae (Zoea Ⅱ～Ⅴ and Megalopa 1～2 days old) to salinity variations in the experiment. The results showed that the daily decreasing range of salinity should not be higher than 1‰ during the Z 2 to Z 3 developmental period, and not higher than 2‰～3‰ during Z 4 to Z 5 developmental period. There was almost no serions influence on survival when the daily decreasing range of salinity was below 5‰ during the megalopa 1～2 days old developmental period.