春季气温回升后,养鱼专业户都纷纷选购鱼苗放养。在选购鱼苗的过程中,如何识别鱼苗的优劣呢? 一是看。主要是看鱼苗的生长状况。凡体质健壮的鱼苗,背部、尾部的肌肉肥厚,鳞片完整,鳍条无损,体表光滑,无伤、无寄生虫,且同种、同龄的鱼苗,大、小均匀,体重基本相同。 二是旋。就是将鱼苗放入孵化缸或鱼桶中,用棍棒插入水中,将水搅动后产生旋涡。这时,能在旋涡边缘逆水游动 After the temperature rose in spring, fish specialized households have purchased fry stocking. In the process of buying fry, how to identify the pros and cons of fry it? First look. Mainly to see the growth of fry. Where the physical health of the fry, back, tail muscle hypertrophy, scales complete, non-destructive fin, smooth surface, no injuries, no parasites, and the same age, fry, large and small uniform, the same weight. Second, spin. Is the fish into the hatching tank or fish tank, with sticks into the water, stirring the water vortex. At this moment, we can swim against the edge of the vortex