Abstract: The mature glochidia of Anodonta euscophys were exposed to a series of pH(3.0~12.0) during six days.The sample was observed every twenty-four hour. The results showed that the glochidia were adaptable to neutral and weak basic environment.The survival rate of glochidia exposed to pH7.0 was the highest during the same time,and 70% of samples still surived after 5 days at pH7.0 environment.Accordingly,the survivial rate decreasing with its condition deviating neutral.The survival rate of glochidia declined wi...