(1) Feeding and Feeding: Feeds for raising seedlings are basically the same as those for other sea fish: rotifers, Artemia larvae and adults, and fish. Copepods and clams are good foods and should be used if they are well sourced. The larvae start feeding approximately 7 days after hatching. The larvae have a large yolk sac and start feeding before the yolk sac is completely absorbed. Therefore, feeding should be started before this. Different from the gums, the false eye is different from the gums. The latter experiences the process of hanging over and then swimming horizontally. When the former is hatched, it always moves horizontally. Therefore, swimming alone cannot be used to determine whether to start eating. The rotifer feeding density requires more than 2 per millimeter. FIG. 5 is a feeding sequence of a bait series for reference: feeding rotifers from 7 to 21 weeks of hatching. From 11th Sunday, Artemia larvae were conceived. On 27th Sunday, a small amount of minced fish can be cast. Fry can not swallow large pieces of fish at this time, but the entire line of jade fish hanging in the water can be eaten only bones. If conditions permit, when feeding fish, individual larger bait such as Artemia adults or prawn can be fed. Feeding times 4 times a day, 2 times in the afternoon. The nursery is in spring and summer and grows during the day. The first feeding, feeding as soon as possible, slows the fry killing each other due to hunger. Last time try to feed before dark.
(2) Seedling density: The density of nursery has a great relationship with the culture technology. The amount of water to be changed is large enough for bait and the density can be increased. The number mentioned here is the current general level of nursery. False eye Eastern killing each other is more serious, the density is better than other fish. The density of newly hatched larvae can hold 5000-10000 tails per cubic meter of water body; 10-15 millimeters in length, 1500-2000 tails, 20-25 millimeters, 1000 tails, 30-35 millimeters, 600-800 tails, 40-50 millimeters, 400-500 tails.
(3) Preventing cannibalism: False Eyes Eastern etc. are more serious than many other fish. The fish fry bite each other when they grow to about 4 mm in length. Most of the bites are caudal and pectoral fins. The bitten fry can break free, but the fins have been bitten, so there are many incomplete fins in fish fry above 5 mm. As the fry grows, biting each other becomes more and more serious. When it was about 40 mm in length, it not only bitten the fins, but even bitten off the tails of other fry, causing death. At present, there are no measures that can completely prevent the cannibalism. Only killing can be reduced. Under artificial breeding conditions, it is still a problem to keep the fins intact. The following are ways to reduce the fratricide:
1 Timely feeding individuals of different sizes into separate ponds. Splitting is conducive to the growth of smaller individuals and reduces the risk of death.
2 feeding ample. Hunger causes a strong desire for fish to eat, and the more severe the biting of each other becomes. Satisfying the fish can reduce the number of bites, but it can't be done without biting. Some people think that they like to bite. During the breeding process, the cage was bitten and the inflatable tube was snapped.
3 Properly reducing the density can reduce the chance of biting each other.
4 Take measures to cut the teeth. This method is suitable for larger fry. Four months of fry can take this measure. The teeth are connected to the jaw and cannot be pulled but only cut. After cutting it will grow. Teeth cutting tools available rongeur. This approach also serves to slow down.
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