一、鳜鱼食欲减退或不摄食的主要原因1.长期不换水,水质恶化。鳜鱼养殖户往往由于水源不良、自认为池水良好等因素而不换水。在养殖过程中,鳜鱼大量捕食饲料鱼,其排泄物对养殖水体的污染十分严重(尤其在水体底部),但从表面来看水却很清。养殖户往往用成鱼养殖看水色的方法来判 First, the main reason for the loss of anchovy appetite or food intake 1. Long-term do not change the water, deteriorating water quality. Catfish farmers are often due to poor water, water and other factors that do not think that good water change. During the breeding process, catfish prey on large numbers of feed fishes, and their excrement pollutes the aquaculture water especially at the bottom of the body of water, but water is clear on the surface. Farmers often use aquaculture methods to judge