Breeding method for bionic freshwater South American parent white shrimps

Abstract

The invention relates to a breeding method for bionic freshwater South American parent white shrimps, and belongs to the technical field of parent shrimp breeding methods. The method includes the following steps: allowing the parent shrimps to lay eggs in seawater, and hatching the eggs; gradually desalting a water body for culturing young shrimps until the salinity of the water body is not higherthan 1.5%o, and culturing the young shrimps into sub-adult shrimps under normal production conditions; gradually salting a water body for culturing the sub-adult shrimps until the salinity of the water body reaches 28-35%o; taking the sub-adult shrimps as standby parent shrimps for continuous culture; selecting the standby parent shrimps free of broken limbs and full of vigor as candidate parentshrimps. Compared with conventional breeding methods for South American white shrimps, the breeding method has the advantages that the bred South American white shrimps can adapt to various breeding environments to ensure high survival rate, high growth rapid and high stress resistance in the cultivation process of the South American white shrimps; the reproductive properties of the South Americanwhite shrimps can be maintained, and the obtained desalted or salted shrimps can be taken as the parent shrimps and have high fertility.

Description

technical field [0001] The invention relates to a method for breeding broodstock of prawns, in particular to a method for breeding broodstock of bionic freshwater Penaeus vannamei. Background technique [0002] The natural wild Penaeus vannamei is a migratory animal, and its life cycle includes freshwater environment. Its main fattening environment is the South American lagoon system with a huge change in salinity (0-68‰), so wild Penaeus vannamei can be adapted to the salinity of 0-45‰ Aquaculture in various water bodies. [0003] Since all current broodstock breeding processes of Penaeus vannamei are carried out in natural standard seawater with a salinity greater than 28‰, such as figure 1 As shown, there is no freshwater process, resulting in the dependence of the selected vannamei on natural seawater, and it is difficult to adapt to freshwater and brackish water environments. In many freshwater environments, seawater must be added to freshwater before breeding to ensur...

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Problems solved by technology

[0003] Since all current broodstock breeding processes of Penaeus vannamei are carried out in natural standard seawater with a salinity greater than 28‰, such as figure 1 As shown, there is no freshwater process, resulting in the dependence of the selected vannamei on natural seawater, and it is difficult to adapt to freshwater and brackish water environments. In many freshwater environments, seawater must be added to freshwater before breeding to ensure a certain survival rate. , which not only causes high cost of breeding, and cannot be used in an inland freshwater environment far from the coast, but also may cause the breeding environment to be polluted by seawater.

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