Below we learn how to raise Mandarin fish fry and see what kind of feed they eat.
A, Mandarin fish fry how to raise just opened the Mandarin fish fry itself is very small, the mouth cleft is also relatively small, and thus the opening of the bait fish fry of the appropriate size, directly affecting the Mandarin fish fry feeding and survival rate.
This stage is the key to the culture of commercial Mandarin fish, and it is generally common to use both earthen pond cultivation and net box cultivation.
Either way, the following should be noted:
(1) The stocked Mandarin fish summer flowers of about 3cm should be soaked in 3PPM copper sulfate or 3% saline water for 5-10 minutes.
(2) Oxygenating equipment should be equipped during the cultivation process, and oxygen should be increased immediately when floating head is found.
(3) Every morning and afternoon, check regularly the feeding, growth and elongation of bait fish of Mandarin fish species, replenish the number of bait fish and adjust their specifications at any time.
Two, Siniperca fish fry eat what feed Siniperca fish life-long ingestion of live fish, as Siniperca fish open bait, it is best to use those small and tender bait fish.
Comparing the length and height of different kinds of fish fry, we found that the fry of Doryx pomfrets soon after the film came out, with a total length of 5.1 millimeters and a height of only 0.7-0.8 millimeters, with a weak and tender tail tip, and a weak ability to swim, the Mandarin fish fry could easily bite and swallow the fish from its tail.
Therefore, the opening bait of Mandarin fish is better to be the groupers fry which are 1-3 days after they come out of the membrane.
Three, how to carry out the production of palatable bait fish in the actual production, group head pomfrets fry used for Mandarin fish opening stage, crucian carp fry, wuzai, summer flower used for the whole process of Mandarin fish fry production, and the later with the four big fish, pangolin fish fry for supplementation.
Carp fry, compared with other bait fish, are simple and easy to obtain, with lower cost, large production volume and easier control of specifications, and can be applied in large quantities in Siniperca fish breeding.
Generally, 200-300 kg of crucian carp parents are released in mu, cultivated in shallow water (0.8-1.2 meters), fed with germinated wheat from March, and stimulated by regular flushing from mid-month, aiming to produce the first batch of eggs in late March.
Generally use natural spawning, continuous egg collection 2-3 times.
After spawning, then continue to intensive cultivation, usually 10 days later, the carp began to spawn for the second time, so that it can be carried out about 3 times.
To make it spawn later, you must deepen the water level to about 2 meters, delay the gonadal development, which can be postponed to late April spawning, lengthening the reproduction period of crucian carp.
Before collecting the eggs, you must pay attention to the weather conditions and choose to collect the fertilized eggs when the weather is fine and the temperature is high.
After crucian carp spawning, the eggs produced within three days can be put into the same pond for incubation, the number of stocking should be organically combined with the cultivation of Siniperca fish fry, such as in the future to cultivate Siniperca fish species in the pond, it can be appropriate to put more crucian carp fertilized eggs, about 5 million per mu; such as purely as a bait fish cultivation, can be put 1-2 million per mu, stocking is too sparse or too dense is not conducive to the cultivation of bait fish.