When the fry larvae are obviously inflated and they start feeding, they can emerge into the lower pond or transport. The emergence method is: concentrate the fry in a corner of the cage, use a small container to quickly measure the total number of fry, draw a few cups count, calculate the average number of fry per cup. The product of the total number of fry and the average number of fry per cup is the total number of fry. . When emerged, the temperature difference between the water should not exceed 2°C. Care should be taken to prevent damage to the fry.
(B) Nursing of postpartum broodstock
The post-partum broodstock is weak and should be fed in a pond with adequate dissolved oxygen and suitable temperature to allow them to restore their physique as soon as possible. If the broodstock is injured, the wound may be smeared with antibiotic ointment. The wound may also be coated with 1% potassium permanganate solution. In severe cases, penicillin can be injected intramuscularly (10,000 units/kg).