Method for performing crassostrea hongkongensis artificial breeding by using northern high-temperature period

Abstract

The invention provides a method for performing crassostrea hongkongensis artificial breeding by using the northern high-temperature period. The method aims at the technical problem of the crassostrea hongkongensis breeding; new technologies of a parent oyster high-temperature ecological maturity promotion culture technology, a fast oviposition inducing technology, a special attachment base seedling harvesting and crushing technology and the like are developed; idle seedling breeding workshops in the northern high-temperature period are used for realizing the novel northern breeding and southern culture breeding mode; the method is a key point for solving the difficult problem. Meanwhile, the problems of low growth speed, long culture period, high death rate and the like of the crassostrea hongkongensis natural seedlings can be solved; particularly, the existing habit that the natural seedling collection, breeding and harvesting are all operated on the sea is changed; the economic loss of mariculture caused by natural hazards such as typhoon and rainstorm in south coast can be obviously reduced; meanwhile, the utilization rate of the northern high-temperature period seedling culture workshops is also improved. Practices prove that the southern culture of northern seedlings of the crassostrea hongkongensis is realized; the culture time of the crassostrea hongkongensis is shortened by 0.5 to 1.0 year; the culture survival rate is improved by 30 to 50 percent.

Description

technical field [0001] The invention relates to a method for producing seedlings of Hong Kong oysters, in particular to a method for artificially cultivating Hong Kong oysters by utilizing the northern high temperature period. Background technique [0002] With the development of the Internet and cold chain logistics, oysters are the most suitable aquatic products for live transportation among aquatic products. They are rich in nutrients and delicious in taste. The market is in short supply, the price is soaring, and the oyster breeding area is also expanding. [0003] Hong Kong Oysters ( Crass0strea hongkongensis ) is an excellent oyster species with high temperature resistance and low salt resistance. It inhabits near the estuary or near the place where fresh water is injected. It is a large economical shellfish unique to the southern sea area of ​​my country. The shell of Hong Kong oysters is hard and thick, the soft part is white, and the mantle is mostly black. It has ...

AI Technical Summary

Problems solved by technology

[0004] At present, the source of oyster seedlings in Hong Kong in my country is mainly semi-artificial harvesting in natural sea areas, but wild seedlings are greatly affected by climate and seasonal changes, especially affected by extreme weather such as typhoons in South China. The supply of seed is highly unstable, which limits the development of Hong Kong's oyster farming industry

[0005] Oyster artificial breeding in Hong Kong is limited by its unique living habits and reproductive biology characteristics, as well as the southern breeding technology, breeding facilities and conditions, and the success rate of breeding is low

Among the above-mentioned nursery technologies, high-salt maturation-promoting cultivation technology, spawning induction technology, fertilization and hatching technology, selection and treatment of easy-to-peel attachment substrate, and cultivation technology of large-scale individual oyster seedlings are the main technical bottlenecks in Hong Kong oyster seedling cultivation, which are difficult to overcome , resulting in extremely low emergence of Hong Kong oyster seedlings, which cannot reach the level of productive seedlings, and of course cannot meet the needs of breeding units for seedlings. Therefore, wild Hong Kong oyster seedlings are mainly used for breeding, while wild seedlings grow slowly, and High mortality rate, not suitable for artificial breeding