Water temperature: the suitable water temperature for the growth of Penaeus vannamei is13 ~ 40℃, and the optimum temperature for the growth is 23 ~ 30℃. When the water temperature is lower than 16℃, it stops eating, and coma occurs when it is lower than 13℃ for a long time; When the water temperature rises to 4 1℃, all individuals whose body length is less than 4 cm die within 12 hours.

Salinity: The suitable salinity for the growth of Penaeus vannamei is 2-34 ‰, and the optimum salinity is10-20 ‰, which is similar to that of Penaeus vannamei in China. Under the condition of gradual desalination, Penaeus vannamei can grow in fresh water with salinity of 2‰, but its taste is slightly reduced, and the survival rate of long-distance transportation is relatively low. Therefore, if conditions permit, the salinity should be gradually increased at1~ 2 weeks before harvest.

Cultivation, maturity and spawning of parent shrimp

Parent shrimps for breeding can be directly caught from the brooding mother shrimps in the sea area, or cultured prawns can be mated and laid eggs after they are matured. The mating and spawning of Macrobrachium rosenbergii and other true shrimps are carried out when the females mature and molt. Shrimp mate before spawning, and the female carries sperm pods to fertilize during spawning.

Therefore, male shrimps are not required to participate in the fertilization process. Measures such as raising the water temperature or removing the eyestalk (destroying the gland that secretes ovarian growth inhibitory hormone) can promote the gonad development and maturity of the parent shrimp and lay eggs early.

Reference to the above content? Baidu Encyclopedia-Penaeus vannamei