Method for promoting nature spawning of american shad by using artificial culture ecological factor

Abstract

The invention relates to a method for promoting nature spawning of american shad by using an artificial culture ecological factor. The method comprises the following steps: (1) performing deep well water treatment; (2) selecting a reserved parent; (3) establishing a cultivation system; (4) performing seasonal cultivation on the parent; (5) realizing nature spawning; (6) arranging an egg collecting box at the water outlet of a cultivation pond, collecting fertilized eggs and putting the fertilized eggs into a conventional incubator for incubating. The maturation of pond-cultured american shad a germ cells is started and induced, and nature spawning is promoted finally via ecological regulation and control measures of water temperature, dissolved oxygen, regular water injection stimulation and the like, parent deaths caused by artificial spawning induction are reduced, and the labor intensity is lowered.

Description

Technical field [0001] The invention relates to the technical field of fish breeding, in particular to a method for artificial breeding ecological factors to promote the natural spawning of American shad. Background technique [0002] Shad is a migratory fish that spawns anadromously. It usually lives in the sea. After reaching sexual maturity, its reproductive population regularly migrates upstream from the ocean to waters with suitable environmental conditions every year. Under the stimulation and mutual induction of male and female fish, the natural spawning process is completed and natural reproduction is realized. [0003] The breeding of famous and precious fish in ponds has different special requirements for different species, but limited by the ecological environment conditions of pond cultivation, it is generally necessary to inject hormones from exogenous sources, and at the same time create necessary ecological conditions such as: water temperature, water stimulat...

AI Technical Summary

Problems solved by technology

When the American shad was moved from the natural environment to the artificial environment, the main ecological factors closely related to reproductive activities, such as water flow, nutrition, salinity, temperature, etc., had undergone tremendous changes. The adjustment process of the environment itself may cause its reproductive endocrine imbalance. If the intensity of external factors changes exceeds the self-regulation range of the ecosystem and American shad, it will lead to obstacles in the reproductive mechanism of American shad.

[0006] A small number of research institutes in China have tried to carry out artificial propagation of American shad. However, due to the strong stress response of American shad, the harvesting operation is difficult, and artificial propagation can easily lead to the death of parents. Therefore, the artificial propagation technology of American shad still needs further research. improve and perfect