Method for increasing artificial incubation success rate of rainbow trout fish eggs and survival rate of fry

A technology of artificial hatching and success rate, applied in fish farming, climate change adaptation, application, etc., can solve the problems of low survival rate of fry, low success rate of rainbow trout eggs, and failure of fertilized eggs to hatch fry, etc., to achieve hatching The effect of increasing the success rate and the survival rate of fry

Inactive Publication Date: 2017-09-12
北京市水产技术推广站
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The fertilized eggs of rainbow trout are most susceptible to Saprolegnia infection during the artificial incubation process, resulting in the inability of the fertilized eggs to hatch into fry, thus making the success rate of rainbow trout eggs hatch extremely low
And because the surface of fish eggs often carries viruses such as infectious hematopoietic necrosis virus and infectious pancreatic necrosis virus, even if fish eggs are successful...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The method for improving the artificial hatching success rate of rainbow trout roe comprises the steps:

[0037] During the hatching process of fish eggs, after the fish eggs enter the stage of developing eyes, add povidone-iodine and formaldehyde alternately to the water until the end. Wherein, when povidone iodine or formaldehyde is added each time, the concentration of added povidone iodine or formaldehyde in water reaches 70 mg / liter and 400 mg / liter successively.

Embodiment 2

[0039] The method for improving the artificial hatching success rate of rainbow trout roe comprises the steps:

[0040] During the hatching process of the fish eggs, after the fish eggs enter the stage of developing eyes, add povidone iodine and formaldehyde alternately to the water until the hatching ends;

[0041] Wherein, the step of adding povidone iodine and formaldehyde alternately to water specifically includes the following operations:

[0042] Add povidone-iodine to the water first, so that the concentration of povidone-iodine in the water reaches 70 mg / L, keep the water flow still for 10-15 minutes after adding all the water, then release the water, and re-inject the water;

[0043] After 3-4 days, add formaldehyde to ensure that the concentration of formaldehyde in the water reaches 400 mg / L. After adding all the formaldehyde, keep the water flow still for 12-20 minutes, then release the water and re-inject the water.

Embodiment 3

[0045]The method for improving the artificial hatching success rate of rainbow trout roe comprises the steps:

[0046] During the hatching process of the fish eggs, after the fish eggs enter the stage of developing eyes, add povidone iodine and formaldehyde alternately to the water until the hatching ends;

[0047] Wherein, the step of adding povidone iodine and formaldehyde alternately to water specifically includes the following operations:

[0048] Add povidone-iodine to the water first, so that the concentration of povidone-iodine in the water reaches 80 mg / L, keep the water flow still for 10-15 minutes after adding all the water, then release the water, and re-inject the water;

[0049] Add formaldehyde after 3-4 days to ensure that the concentration of formaldehyde in the water reaches 450 mg / L. After adding all the formaldehyde, keep the water flow still for 12-20 minutes, then release the water and re-inject the water.

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PUM

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Abstract

The invention provides a method for increasing the artificial incubation success rate of rainbow trout fish eggs and the survival rate of fry. The method comprises the following step that in a fish egg incubation process, after the fish eggs enter the eyeing stage, povidone-iodine and formaldehyde are alternately added into water till incubation is finished. According to the method, povidone-iodine and formaldehyde are alternately added into the water from the eyeing stage of the fish eggs to the time when inoculation is completed so that the occurrence of water mildew can be prevented, infectious hematopoietic necrosis viruses and infectious pancreatic necrosis viruses on the surfaces of the fish eggs can be effectively killed, and accordingly the incubation success rate of the fish eggs and the survival rate of the fry are greatly increased.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for improving the success rate of artificial hatching of rainbow trout eggs and the survival rate of fry. Background technique [0002] Rainbow trout (including golden trout) belongs to the family Salmonidae, originating in mountain streams in California, U.S.A., and is one of the most widely distributed fishes in aquaculture areas in the world today. It is a kind of rare salmon fish and one of the rare high-grade fish. The meat is fresh and tender, delicious, no fishy, ​​no small bone spurs, high protein and fat content, almost zero cholesterol, IPA (unsaturated fatty acid) content It is several times higher than other fishes, has good medicinal and edible value, and has become one of the important species in the current freshwater aquaculture industry. [0003] In the breeding process of rainbow trout, an important link is the artificial hatching link. Artificial...

Claims

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Application Information

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IPC IPC(8): A01K61/10A01K61/17A01K63/04
CPCA01K61/00A01K63/04Y02A40/81
Inventor 徐立蒲王静波曹欢潘勇王小亮王姝江育林
Owner 北京市水产技术推广站
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