Crossing method for female pelteobagrus fulvidraco and male pelteobagrus vachelli and compounded feed additive

Abstract

The invention discloses a crossing method for female pelteobagrus fulvidraco and male pelteobagrus vachelli and relates to the technical field of cross breeding of freshwater fishes. According to the crossing method, the disease rate of fish fries can be lowered, and the quality of the fish fries can be improved while the cost is reduced. The crossing method for the female pelteobagrus fulvidraco and the male pelteobagrus vachelli comprises the steps: (1) carrying out parent culture: carrying out temporary-culture acclimatization on the female pelteobagrus fulvidraco and the male pelteobagrus vachelli until the female pelteobagrus fulvidraco and the male pelteobagrus vachelli reach parent fish standards, and separately feeding parent feed to the female pelteobagrus fulvidraco and the male pelteobagrus vachelli during acclimatization, wherein the parent feed comprises basal feed and a compounded feed additive, and the compounded feed additive contains chitin, taraxacum mongolicum and curcumin; (2) carrying out artificial inducement for spawning: adopting two-injection injecting, wherein the time interval for two injections is 10h; (3) carrying out natural fertilization; and (4) carrying out artificial hatching: taking out fertilized eggs, and hatching the fertilized eggs in a cement pit, wherein water in the cement pit is underground water. The crossing method is used for achieving the crossing of the female pelteobagrus fulvidraco and the male pelteobagrus vachelli.

Description

technical field [0001] The invention belongs to the technical field of crossbreeding of freshwater fish, and in particular relates to a hybridization method of female yellow catfish / jiang yellow catfish and male yellow catfish. Background technique [0002] Yellow catfish and yellow catfish belong to the same genus and belong to the more important bottom small economic fishes in my country. Yellow catfish is suitable for farming in ponds, but it is smaller and grows slower. Yellow catfish, also known as Jianghuang catfish, is large and grows rapidly, but its low oxygen tolerance and stress resistance are poor, so it is difficult to be suitable for pond culture. At present, through the crossbreeding and selective breeding of yellow catfish and yellow catfish in China, a new species of yellow catfish that is suitable for pond farming, grows faster, and is larger is being cultivated. [0003] In the prior art, the fertilization method is mainly artificial insemination, which ...

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Problems solved by technology

[0003] In the prior art, the fertilization method is mainly artificial insemination, which leads to the male yellow catfish having to be killed to obtain the testes. Although the use of this method, although the spawning time is uniform and the seedlings emerge neatly, the death rate of the parents is very large, which cannot Repeated use greatly increases the cost of hybridization

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