Method for reproducing procambarus clarkii with greenhouse

Abstract

The invention relates to a freshwater crayfish breeding method in the utilization of a greenhouse, in particular to an artificial breeding method of economic freshwater shrimp, which is characterized in that the greenhouse is firstly built where the inside is provided with a pond, and an oxygenation device is arranged inside the pond. The parent shrimp disinfection and stocking as well as the parent shrimp cultivation and oviposition are implemented. After the gonadal maturation, the parent shrimp is in oviposition in the pond. And then the larval culture is implemented. After the larvae is hatched out, the fertilization to the pond is done so that the larvae can grow in a water ecosystem. The feedstuff feeding is done to feed the larvae becoming a young shrimp after the cultivation. With the invention, the parent shrimp gonadal maturation can be sped up, the parent shrimp reproductive rate can also be enhanced. The young shrimp yield can be increased, and the effective young shrimp growth period is extended, thereby the aquaculture yield and benefit are increased. Therefore, the perennial propagation of freshwater crayfish is achieved. Moreover the young shrimp production and the aquaculture production are also matched.

Description

technical field [0001] The invention relates to a method for breeding Procambarus clarkii in a greenhouse, in particular to an artificial breeding method for freshwater economical shrimps. Background technique [0002] Procambarus clarkii, commonly known as freshwater crayfish, belongs to the family Arthropoda, Crustacea, Crustacea, Decapod, Cricketidae, and belongs to freshwater shrimps. It is native to North America and was introduced to my country through Japan in 1929. Since the wild Procambarus clarkii has been caught in large quantities by humans, the number has decreased sharply. Therefore, the seed production of Procambarus clarkii by artificial breeding can not only solve the problem of seed source for aquaculture production, but also help increase production. Meet the needs of the market. At present, the artificial propagation method of Procambarus clarkii usually includes three steps: breeding of broodstock, mating and spawning of broodstock, and cultivating larv...

AI Technical Summary

Problems solved by technology

Its defects are: 1. Parent shrimps are cultivated in open-air ponds, and the gonads stop developing and degenerating in winter. The gonads can mature again after July of the next year, and the breeding period is short; 2. The output of shrimp fry is low; 3. The production of shrimp fry The peak period is generally after September, and the effective growth period of the bred shrimp fry is short, and the size of the commercial shrimp grown is small, which is not conducive to the improvement of aquaculture production; most of the shrimp fry bred after April and October are difficult to grow commercial shrimp, so It can only be used as seedlings for stocking in the next year after overwintering, and the cultivation period of shrimp seedlings is as long as 5-6 months

Prolonging the production cycle not only reduces the survival rate of shrimp seedlings, but also increases production costs; 5. The best time for stocking shrimp seedlings during commercial shrimp farming is from March to July. Due to the adoption of natural wintering, the gonad development of broodstock shrimp is relatively slow slow, and it is difficult to advance the breeding period, so there is a seasonal misalignment between the production of shrimp fry and the production of aquaculture

Due to the existence of the above defects, the existing Procambarus clarkii artificial propagation method has high seedling cost, low yield and poor benefit.