Method and device for catfish artificial propogation and fertilized egg circular path hatching

A technology for artificial reproduction and fertilization of eggs, applied in the field of fish farming, can solve problems such as hindering the development of catfish aquaculture, difficulty in large-scale production of fry, and long spawning duration.

Inactive Publication Date: 2005-03-02
HUANXIN FIELD OF AQUATIC PROD & FINE BREED TIANJIN
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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 natura...

Method used

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Examples

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Embodiment Construction

[0011] In order to further understand the content, features, and effects of the present invention, the following examples are given for detailed description as follows:

[0012] 1. Exogenous hormones induce ovulation and artificial reproduction of the broodstock of sexually mature catfish and the method of hatching the fertilized egg loop:

[0013] 1). At the end of May or June 23, select females with well-developed gonads and a body weight of more than 1 kg from the 3rd instar broodstock, and male fish with a weight of more than 0.6 kg as broodstock for inducing spawning.

[0014] 2). Luteinizing hormone releasing hormone A is used to induce ovulation and fertilization of broodstock. 2 (LHRH-A 2 ), Dioxin maleate (DOM), and chorionic gonadotropin (HCG), a mixture of 3 oxytocin drugs. The doses of the 3 drugs are used for each kilogram of fish body weight: A 2 (LHRH-A 2 ) 32 micrograms, 6.0 mg of dioxenone maleate (DOM) and 2400 IU international units of chorionic gonadotropin (HC...

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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, and particularly relates to a method and facility for artificial reproduction of catfish and loop hatching of fertilized eggs. Background technique [0002] At present, the reproduction of the well-known catfish mainly relies on natural spawning, sometimes supplemented by the injection of exogenous hormones, the spawning pond is arranged with a bionic fish nest, so that the sexually mature or induced catfish naturally lays eggs on the nest, and then collects the sticky fish The eggs are placed in the fish nest and hatched in the hatching tank. Due to the influence of climate and natural conditions, broodstock cannot lay eggs in a concentrated manner, and because weak fish lay eggs and some eggs will be buried in the soil, the highest natural spawning rate is only 40-50%; and the spawning time is very long , It is difficult to implement large-scale production of fish fry, which hinders the development of catfi...

Claims

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Application Information

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