在目前的饲喂条件下,要消灭一切病原体是不可能的。但要控制鱼病的发生,我们可从提高鱼体抵抗力入手,效果会好些。一、合理的混养 此法不仅提高单位面积产量,对鱼病的预防也有较好的作用。因为不同种鱼类上的寄生物不完全相同,某些寄生物只能寄生于某种寄主,别的鱼类对其有免疫力,由于混养的结果,实际上就使这种鱼 Under the current feeding conditions, it is impossible to eliminate all pathogens. However, to control the occurrence of fish diseases, we can improve the fish’s resistance to start, the effect will be better. First, a reasonable polyculture This method not only increase yield per unit area, the prevention of fish diseases also have a better effect. Because different species of fish on the parasite is not exactly the same, some parasites can only parasitize a host, other fish are immune to, as a result of polyculture, in fact, make the fish