近年来由于常规水产品价格下跌,养鱼比较效益下降,不少养殖户转向特种水产品养殖。但是多数特种水产品为肉食性或杂食性动物,在养殖过程中,一旦发生饲料及环境等条件难以满足其自身要求,即极易造成种内自相残杀,从而造成不应有的损失。笔者现将特种水 In recent years due to the decline in the prices of conventional aquatic products, the benefits of fish farming have decreased, and many farmers have turned to special aquatic products breeding. However, most of the special aquatic products are carnivorous or omnivorous animals. In the process of breeding, once the conditions of feed and environment are hard to meet their own requirements, they can easily cause cannibalism within their species and thus cause undue losses. I now special water