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Hybrid propagation method

A loach and loach-parent technology, which is applied in fish farming, application, climate change adaptation, etc., can solve the problems of unsatisfactory artificial labor induction, affecting the loach's egg volume, and incomplete nutrition of the loach, reducing the number of reproduction and production links. , reduce the cost of reproduction, and overcome the effects of poor adaptability to the external environment

Inactive Publication Date: 2014-12-24
ZHEJIANG OCEAN UNIV
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Problems solved by technology

[0006] In the above-mentioned breeding method, parent loach is incompletely nourished in the stage of intensive cultivation, which affects the amount of fecundity of loach and increases the cost; during artificial induced labor, there are only two kinds of drugs to induce labor and fertilization: HCG and dioconone maleate DOM, and the effect of artificial induced labor is not good. Ideally, it may even cause about 25% of loaches not to lay eggs, which also makes the cost higher; the number of male loaches is more than that of female loaches, and the ratio of the two numbers makes the cost higher

Method used

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] A method for hybrid breeding of loach, comprising the following steps:

[0023] 1. The choice of pro-loach

[0024] Select the age at 3-4 years old, individual body weight female 15-20g, preferably 20g, male 8-12g, preferably 12g close loach. If the age of the parent loach is too young, the amount of fecundity will be small, and if the age is too old, the quality of the sperm and eggs will be poor, and the fertilization rate will be low; in addition, the male and female parents of the loach are required to come from different regions, which can be avoided as much as possible. Inbreeding, the first generation of its offspring can reflect hybrid vigor and show a faster growth rate. The choice of male and female loach can be selected according to the shape of the pectoral fin and the gender characteristics of the body surface. Among them...

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Abstract

The invention discloses a fertilized ovum hatching device for loach. The hatching device comprises a vat, an air charging device, a water inlet pipe, a fry discharge pipe arranged at vat bottom and having terminal end bending downwards, a control valve arranged on the fry discharge pipe, an egg laying net bag arranged in vat mouth, and an overflow pipe arranged adjacent to outside of vat mouth. The invention also discloses a hybrid propagation method utilizing the above hatching device, which can greatly improve yield and lower cost.

Description

technical field [0001] The invention relates to a method for breeding aquatic products, in particular to a method for breeding loach. Background technique [0002] Loach is a famous and high-quality fish widely distributed in my country. They are delicious, tender and nutritious, and have high medical value, so they are favored by consumers. Loach has become an important aquaculture species because of its strong adaptability, few diseases, high survival rate, strong reproductive capacity, convenient transportation, and easy-to-get feed. The market price has doubled several times and continues to rise. It is one of the important aquatic products exported by my country's foreign trade. The super-high benefits of artificially cultured loach have attracted widespread attention from farmers and all walks of life. [0003] In recent years, due to the expansion of loach breeding area and the sharp increase in demand, wild seedlings cannot meet the breeding needs, and industrial art...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 储张杰吴有先王伟洪龚丽贞钟爱华卢国兴卢建达白晓倩陈永强黄文文
Owner ZHEJIANG OCEAN UNIV
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