Factory breeding method for cherax quadricarinatus

Abstract

The invention discloses a factory breeding method for cherax quadricarinatus. The method includes the following steps: breeding male and female parent cherax quadricarinatus in a breeding pool, the change sequence of the colors of cherax quadricarinatus fertilized eggs being bean yellow, dark brown, orange and dark orange red; selecting ovigerous females whose fertilized eggs grow to dark orange red to individually place, and performing separation operation; collecting the ovigerous females to put into hatching pool to perform hatching through natural mating; individually putting each selectedovigerous female whose fertilized egg is in a specific development period into a transparent plastic box, and closing the plastic boxes to limit the activities of the ovigerous females; and performing further subdivision on the ovigerous females put in the hatching boxes, and putting the ovigerous females with proper density into each nursing pool according to brood amounts and the maturity conditions of egg development. The method effectively reduces influences of factors such as shrimp seeds collecting and tardy avoiding on survival rates; and through the mode of artificial operation, superfluous labor can be reduced, and labor efficiency can be enhanced.

Description

Technical field [0001] The invention belongs to the technical field of aquaculture, and specifically relates to an industrialized breeding method of red crayfish. Background technique [0002] Red crayfish (Cherax quadricarinatus), also known as Australian freshwater crayfish, is native to Australia and its shape is similar to Procambarus clarkii (crayfish). Compared with crayfish, red crayfish has many advantages, such as fast growth, high edible rate, short breeding period, and high market value. my country has introduced this shrimp into the country for breeding experiments since 1992, and the breeding area is only a few hundred mu. With the ever-expanding market demand for freshwater prawns, red crayfish has gradually attracted people's attention. Once the prawns are introduced to the market, they are favored by consumers and have very broad breeding prospects. [0003] During the development of the red crayfish industry in China, a variety of breeding models have been succes...

AI Technical Summary

Problems solved by technology

The disadvantages of this technology are as follows: First, hatching the red-clawed crayfish in the indoor cement tank, the daily observation of the egg development cycle is relatively unfavorable, and the hatching time of the ovipositing female shrimp cannot be scientifically managed

Second, since ovipositors can move freely in the pond, it has a significant impact on the hatching of other ovipositors

Third, the hatched female shrimp will eat the hymenoid shrimp to a certain extent, which greatly affects the survival rate of shrimp seedlings

Fourth, tiles, pvc pipes, plastic pipes, etc. are generally used as shelters for film-produced shrimp seedlings. Daily management is extremely inconvenient, and the operation is cumbersome and time-consuming.

Fifth, there is currently no convenient and efficient artificial breeding method for red crayfish in artificial hatching, which largely limits the development of artificial breeding of red crayfish and the aquaculture industry

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