Method for catfish artificial propogation and fertilized egg circular path hatching

An artificial breeding and catfish technology, applied in the field of fish farming, can solve problems such as hindering the development of catfish farming, difficulty in large-scale production of fry, and long spawning duration.

Inactive Publication Date: 2006-11-08
HUANXIN FIELD OF AQUATIC PROD & FINE BREED TIANJIN
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  • Summary
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AI Technical Summary

Problems solved by technology

Due to the impact of climate and natural conditions, broodstock cannot concentrate on spawning, and because some weak fish spawn and some eggs will be buried in the soil, the highest natural spawning rate is only 40-50%; and the spawning lasts for a long time , it is difficult to implement large-scale production of fish fry, which hinders the development of catfish farming industry

Method used

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Examples

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Embodiment Construction

[0010] In order to further understand the content, characteristics and effects of the present invention, the following examples are described in detail as follows:

[0011] 1. The method of exogenous hormone-induced sexually mature broodstock catfish ovulation, artificial reproduction and fertilized egg ring hatching:

[0012] 1). At the end of May or on June 23, select female fish with well-developed gonads and a weight of more than 1 kg, and male fish with a weight of more than 0.6 kg as broodstock for induction of labor at the end of May or June 23.

[0013] 2). Luteinizing hormone-releasing hormone A is used as a drug to induce ovulation and semen in broodstock 2 (LHRH-A 2 ), dioconone maleate (DOM), and chorionic gonadotropin (HCG) are a mixture of three oxytocin drugs. The doses of the three drugs were used per kilogram of fish body weight: A 2 (LHRH-A 2 ) 32 micrograms, dioconone maleate (DOM) 6.0 mg, and chorionic gonadotropin (HCG) 2400 IU international units, the...

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Abstract

The present invention relates to method and apparatus for artificial catfish breeding and fertilized egg hatching in circular path. Sexually mature female and male catfish over 3 ages are injected with foreign hormone to induce ovulation and spermiation for artificial fertilization, and the fertilized egg is suspended in flowing water with dissolved oxygen over 6 mg / L inside a circular path for hatching. The hatching apparatus has circular or elliptic pond with circular path. The present invention can realize the large scale production of catfish fly and each of the circular path can hatch fertilized eggs over 10 million in the fertilization rate and hatching rate over 95 %.

Description

technical field [0001] The invention belongs to a fish breeding method, in particular to a catfish artificial breeding method and a fertilized egg loop hatching method. Background technique [0002] At present, the reproduction of known catfish mainly relies on natural spawning, sometimes supplemented by injection of exogenous hormones, and bionic fish nests are arranged in the spawning pool, so that sexually mature or induced catfish can naturally lay eggs on the fish nests, and then collect the sticky fish. Egg nests are placed in hatchery tanks to hatch. Due to the influence of climate and natural conditions, broodstock cannot concentrate on spawning, and because some weak fish spawn and some eggs will be buried in the soil, the highest natural spawning rate is only 40-50%; and the spawning lasts for a long time , it is difficult to implement large-scale production of fish fry, which hinders the development of catfish aquaculture. Contents of the invention [0003] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 金万昆
Owner HUANXIN FIELD OF AQUATIC PROD & FINE BREED TIANJIN
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