影响鱼类发病死亡的原因很多,有外界环境条件,也有内在因素。在外界环境条件中,人工的投饵不当是造成鱼类发病死亡的重要原因之一。饵料的质量和投饵技术是影响池鱼高产稳产,取得高效益的关键措施。因此,必须讲究科学投饵,提高饵料利用率,增加鱼产量,防止鱼类因饵料所引起疾病的发生和流行,减少经济损失。科学投饵应根据饲养鱼的种类、鱼体发育不同阶段、池鱼活动和吃食情况以及季节、天气、水质等具体情况,在适当时间和鱼池中的恰当位置进行 There are many reasons that affect the incidence of fish death, there are external environmental conditions, but also internal factors. In the external environmental conditions, artificial improper feeding is one of the important reasons for the death of fish. The quality of bait and feeding technique are the key measures that affect the high yield and stable yield of the fish, and achieve high efficiency. Therefore, we must pay attention to scientific feeding, improve the utilization of bait, increase fish production, prevent the occurrence of fish diseases caused by food and epidemic, reduce economic losses. Scientific feeding should be based on the type of fish feeding, different stages of fish development, fish activities and eating conditions, as well as seasonal, weather, water quality and other specific circumstances, at the appropriate time and fish pond in the right place