The diet of stage I juveniles was dominated by diatoms and green algae. Phase II and III were mainly rotifers, and phase IV and V were dominated by Artemia larvae. Large-eyed larvae feed mainly Artemia adults. In production, the following two tactics are used to cultivate:
One, "the first fat after the Qing" method larvae before hatching 4 to 5 days, nursery ponds per acre of ammonium nitrate 2 ~ 3 kg or superphosphate 1 ~ 1.5 kilograms at the same time into the juvenile like to eat single-cell brown algae cells Liquid, so that the larvae will eat enough food after hatching. You can also use 1 to 1.5 kg of cooked soy milk per mu. "Qingqing" means that after the larvae enters the second period, the food has changed, and a certain amount of eggs of the Fengnian eggs are put in advance in the breeding pond to breed large amounts of Artemia larvae for feeding by the larvae. Stop the fertilization at this time and exchange pool water 1/5~1/4 every day to keep the water fresh.
Second, brine abundance insects "first suitable after the full method" 1 to 2 days before hatching larvae, in the larval rearing tank appropriate amount of eggs, so that Artemia hatching larvae and zoea at the same time hatch growth, for The larvae feed. With the increase of individuals, the bait (Phyllostachysae) density should be 3 to 10 times more than the zoea to provide sufficient food. Breeding water is seawater or artificial brackish water. Stage I and II larvae do not change water, or change water in small quantities. In general, the water changes from stage III. The amount of water changed is about 1/4 of the pool water, and once every two days, the amount of water changed in phase IV is increased. When the phase V and large-eyed larvae are changed, the amount of water is increased to 100%, and it begins. Dilution, change the water during the entire cultivation period to use strict sieve filtration, to prevent the enemy of harmful organisms mixed, always oxygen pump oxygenation, to ensure adequate dissolved oxygen, water quality, water temperature maintained at 20 °C ~ 25 °C, day and night temperature difference Can not exceed 3 °C.
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