在贝类养殖过程中的灾害主要有二个方面:一是理化环境的变迁特别是温度、盐度和营养条件的突然改变,常常造成贝类的大量死亡,恶劣的环境条件,对贝类的卵和幼虫,可造成严重的损害,对于体质虚弱的亲贝,也是一个严重的威胁。环境的突变,如严寒的冬季、连绵的雨季、酷日的曝晒等都? There are mainly two aspects to the disasters in shellfish breeding: one is the change of the physical and chemical environment, especially the sudden changes of temperature, salinity and nutrition conditions, which often result in a large number of shellfish deaths and harsh environmental conditions; Eggs and larvae can cause serious damage to the frail parents, but also a serious threat. Environmental mutations, such as the cold winter, continuous rainy season, cool day exposure and so on?