Hybridization fry breeding method of acipenser schrenckii female fish and polyodon spathula male fish

Abstract

The invention discloses a hybridization fry breeding method of acipenser schrenckii female fish and polyodon spathula male fish. By using sex hormone and temperature water flow adjustment, spawning and spermiation of two kinds of sturgeon are synchronously conducted, the problem of difficult hybridization due to far genetic relationship of two kinds of sturgeon and non-overlapping natural breedingtime is solved, meanwhile, a mode that tubificidae opening and sturgeon feed domestication are combined is adopted, and a novel low-carbon sturgeon variety which is high in yield, good in quality, excellent in comprehensive performance and suitable for south high-temperature weather is bred. According to the hybridization fry breeding method, the fertilization rate of bred hybrid fry reaches up to 60%, the hatching rate reaches 7.5%, the tolerable temperature reaches 30 DEG C, and the bred hybrid fry have the advantages of high temperature resistance, wide application range, high stress resistance and the like and are suitable for breeding of Chinese South.

Description

Technical field: [0001] The invention relates to the technical field of aquaculture, in particular to a method for hybridizing seedlings of a sturgeon female and a male sturgeon. Background technique: [0002] Sturgeon is a fish with high economic value. Its sexual maturity is late and the interval between generations is relatively long. Common interspecies hybridization is an efficient and easy breeding strategy. New species that are better and more in line with market needs, the current output of hybrid sturgeons cultured in China accounts for 60-70% of all breeds of sturgeons. All fishes of the order Acipenseriformes are of polyploid origin, and have strong hybridization ability among species. Dozens of new hybrid species have been selected and bred through the crossbreeding of different types of sturgeons. Among them, the small sturgeon (Hulu × small sturgeon ♂) and Heilongjiang giant sturgeon (Darburi ♀ × Shirley sturgeon ♂) have the advantages of fast growth, strong d...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for hybrid breeding of the female Stryckey's sturgeon (Styren's sturgeon (♀)) and the male sturgeon (♂), which uses sex hormones and temperature and water flow regulation to realize the synchronization of spawning and ejaculation of the two sturgeons To solve the problem of hybridization difficulties caused by the distant relationship between the two and the non-overlapping natural breeding time, at the same time, the combination of water earthworm opening and sturgeon feed domestication was used to cultivate high-yield, high-quality, and comprehensive performance. Adapt to the high temperature weather in the south A new species of low-carbon sturgeon. The fertilization rate of hybrid seedlings cultivated by this method is as high as 60%, the hatching rate is 7.5%, and the temperature tolerance is up to 30°C. It has excellent growth characteristics such as high temperature resistance, wide adaptability, and strong stress resistance. characteristics, suitable for breeding in southern my country

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