之一 养殖鰤鱼的病害防治 鲫鱼是一种名贵的海水养殖新品种，主要开展网箱养殖。随着养殖规模的不断发展，其病害亦日趋严重。的鱼患病时，常有以下一些不正常的表现。应注意观察：①病鱼群大多表现出反常行动，不群游或离群的个体多，游泳不活泼，对外界刺激反应迟钝，行动不 One of the diseases of breeding catfish Crucian carp is a precious new species of marine aquaculture, the main cage culture. With the continuous development of aquaculture, the disease is also worsening. When the fish is sick, some of the following abnormalities are common. Should pay attention to observe: ① most of the diseased fish group showed unusual action, non-group or outlier individual, swimming is not active, unresponsive to external stimuli, the action is not