Breeding method of stress-resistant crassostrea gigas new variety

Abstract

The invention provides a breeding method of a stress-resistant crassostrea gigas new variety. The method comprises the steps that 1, crassostrea gigas with regular shell shapes is selected, and elimination selection is carried out; 2, parent shellfishes with the strongest stress resistance are selected out, and dissecting is carried out after artificial maturation promotion to obtain sperms and ova; 3, after being cleaned, the ova are put into seawater filtered by sand to be cured; 4, one-to-one fertilization is carried out on the cured ova and sperms in sand-filtered seawater to establish families; and 5, the fertilized ova of the different families after fertilization are put into different plastic barrels, the fertilized ova are incubated in sand-filtered seawater, and larva cultivationis carried out. According to the method, along with prolonging of oyster culture time and year-by-year increasing of the oyster death rate, the advantages of the new variety are more remarkable, thelower death rate enables farmers to try to culture oysters of two years old or above, large-size and high-quality oysters more popular with consumers, especially e-commerce, can be produced, and the method has great popularization value.

Description

technical field [0001] The invention relates to the technical field of shellfish breeding; in particular, it relates to a method for breeding new stress-resistant long oyster varieties. Background technique [0002] Commonly known as sea oysters, oysters are the most widely farmed shellfish in the world. They are known as milk in the sea and are important marine biological resources available to humans. my country's oyster production ranks first in the world. Especially in recent years, with the development of e-commerce, more mainlanders have joined the ranks of oyster consumption, and the oyster industry has also achieved rapid development. [0003] However, with the increase of oyster breeding density and the growth of breeding years, the area of ​​sea area where oysters die is also increasing year by year. Sea areas such as Zhifu Island and Yangma Island in Yantai City are facing environmental problems such as sediment eutrophication, seawater acidification, low oxygen ...

AI Technical Summary

Problems solved by technology

The higher and higher mortality rate has brought great losses to the oyster farming industry, and has also prevented farmers from attempting to breed large-sized oysters over one year old, making the oyster farming industry always at the level of low-end competition and unable to achieve industrial growth. upgrade

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