急性盐度胁迫对文蛤和青蛤滤水率的影响

Effects of acute salinity stress on clearance rates of Meretrix meretrix and Cyclina sinensis

以扁藻(Platymonas subcordiformis)为指示饵料,设定4个盐度梯度21、15、10、5,采用静水法测定了急性盐度胁迫条件下文蛤(Meretrix meretrix)成贝、文蛤稚贝和青蛤(Cyclina sinensis)滤水率的变化。结果表明:盐度胁迫对文蛤和青蛤滤水率有显著影响(P<0.05);随着时间的增加,不同规格文蛤和青蛤逐渐适应盐度变化,但适应不同盐度需要的时间长短不同;文蛤成贝较文蛤稚贝对盐度的适应性更强。

The clearance rates of adult and juvenile Meretrix meretrix and Cyclina sinensis under acute salinity stress were investigated using static test method. Four salinity levels（ 21,15,10,5） were set and the algae Platymonas subcordiformis was employed as the indicator diet for the measurement. The results showed that salinity stress had significant effects on the clearance rates of M. meretrix and C. sinensis（ P〈0.05）. Both M. meretrix and C. sinensis could gradually adapt to the changes of salinity,but the duration for adaptation varied. The adult M. meretrix could adapt the salinity change more rapidly than the juvenile.