New-variety reproductive regulation breeding method of lateolabrax japonicus

Abstract

The invention provides a new-variety reproductive regulation breeding method of lateolabrax japonicus and belongs to the field of fish breeding. Regulation targets of the method comprise a southern group and a northern group respectively; the regulation method includes illumination regulation, temperature regulation, salinity regulation and nutrient regulation; and a special incubation device is used when fertilized eggs are incubated. By regulating southern parent fish through gradually prolonging illumination time, stimulating temperature change, stimulating salinity change and the like, the development of sexual glands of the southern parent fish is facilitated, so that sexual maturity time of the southern parent fish is brought forward to October to December from November to January; and meanwhile, the illumination on northern parent fish is reduced and the northern parent fish is cultured at a low temperature, so that the development of the sexual glands of the northern parent fish is delayed, and the sexual maturity time of the northern parent fish is delayed to October to December from September to November. Therefore, the development of the sexual glands of the southern parent fish and the development of sexual glands of the southern parent fish is synchronized, and ovulation and sperm production are synchronized.

Description

technical field [0001] The invention belongs to the field of fish breeding, and in particular relates to a method for breeding regulation and control of the reproduction of a new strain of perch. Background technique [0002] Seabass farming began in the 1970s, and only a few areas began to raise seabass in ponds and harbors. In the 1980s, mariculture in southern my country was rapid, and perch was favored as a species in cages and ponds. In recent years, the status of perch farming in my country has been on the rise, and the cultivation of perch in cages and ponds has been carried out along the coast of the country. The research on artificial breeding of perch has entered the productive stage. There are two sources of broodstock, one is the mature individual caught in the wild at sea; the other is selected from the breeding group. The source of the genetic background of sea-caught broodstock is unclear, and the growth traits are unknown. The genetic variation of the bre...

AI Technical Summary

Problems solved by technology

Although the existing technology also has reproductive regulation by adjusting temperature, light or hormones, the amount of sperm (egg) produced by broodstock is small, and the hatching rate and emergence rate are low, indicating that although the broodstock after regulation can reach sexual maturity and carry out spawning Sperm, but the gonads are poorly developed, resulting in poor egg or sperm quality

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