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Natural reeves shad breeding method

A technology of natural reproduction and shad, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of low fertilization rate, harsh conditions, difficult manual control of spawning and fertilization, and achieve high fertilization rate and good development of eggs. , the effect of increasing the survival rate

Inactive Publication Date: 2013-12-18
JIANGSU ZHONGYANG GRP
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages are: broodstock cultivate natural eggs and sperm, the conditions are harsh, the spawning and fertilization are not easy to artificially control, and the fertilization rate is low
[0005] Therefore, in view of the advantages and disadvantages of artificial breeding and natural reproduction, natural reproduction is still preferred at present. Although the fertilization rate is low, it is a high-quality fertilized egg. Therefore, a natural reproduction method that can improve the fertilization rate is currently needed.

Method used

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  • Natural reeves shad breeding method

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Experimental program
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Effect test

Embodiment 1

[0023] Establish a natural breeding system: choose a square cement pond with rounded corners as the broodstock breeding pond, with an area of ​​700 square meters and a water depth of 1.8m. In the breeding pond, an automatic control system is used to control the water temperature of the breeding pond, and the intensity of light and water flow is cycled. seasonal changes;

[0024] In November, select 3,000 first-year-old fish with large individuals, good body shape, and no blemishes on the surface as broodstock and put them into the broodstock breeding pond for breeding and breeding. The ratio of male to female is 1:1.1, and it is controlled according to the time stage. In December, the fish food is mainly pellet feed, plus 20%~30% fresh feed, of which the fresh feed is fresh fish, shrimp, clams, clams, and bait, and the weight ratio is 2:3 :1:1:3, control the light time from 6:00 am to 4:00 pm, control the water temperature at 14-17°C, and control the water flow rate at 0.2m / s;...

Embodiment 2

[0027] A square cement pond with rounded corners is selected as the broodstock breeding pond, with an area of ​​700㎡ and a water depth of 1.8m. In November, 3,000 first-year-old fish with large individuals, good body shape, and no blemishes on the surface are selected as broodstock for broodstock cultivation. Cultivation and reproduction are carried out in the pond, and the ratio of male to female is 1:1.1. According to normal breeding, compound feed is put in, and natural ovulation is fertilized and hatched.

[0028] The result of above-mentioned embodiment one and embodiment two is compared, and the result is as table one:

[0029] Table I

[0030]

[0031] As can be seen from Table 1, the shad natural breeding method disclosed by the present invention has a large number of broodstock, a high pregnancy rate, and a final hatching rate of more than 95%.

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Abstract

The invention discloses a natural reeves shad breeding method, which includes the following steps: building of a culture system; parent fish rearing and nutrition fortification; setting of laying nests; laying and fertilized egg collection; hatch of fertilized eggs; fish larva rearing; fry rearing. The natural reeves shad breeding method described by the invention has the advantages that obtained fries are well-developed, and have strong constitutions, moreover, eggs and parent fishes cannot be injured during laying, the fertilization rate of eggs is high, and the survival rate of fish larvae is greatly increased.

Description

technical field [0001] The invention relates to the technical field of fish reproduction, in particular to a method for natural reproduction of shad. Background technique [0002] Wild fish reproduce naturally. The male and female broodstock live together in the same water body. After the gonads mature, the female broodstock produces eggs, and the male broodstock produces sperm. The survival rate is high, the swimming is fast, and the probability of combining with the egg is high, and the sperm with poor constitution has a low probability of combining with the egg. The advantages of natural reproduction are: the broodstock naturally lays eggs and the sperm are well developed, and the sperm with good genes are passed on to offspring through natural elimination. However, the disadvantages are: broodstock cultivate natural spawning and sperm, the conditions are harsh, the spawning and fertilization are not easy to artificially control, and the fertilization rate is low. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 朱永祥刘大勇蔡星郭正龙王耀辉
Owner JIANGSU ZHONGYANG GRP
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