Prevention and treatment method of saprolegniasis in incubation period of hucho bleekeri fertilized eggs

A technology of saprolegniasis, Chuanshanzhe, applied in the field of aquaculture, to achieve the effect of reducing the deformity rate and the incidence of saprolegniasis

Inactive Publication Date: 2017-05-24
FISHERIES INST SICHUAN ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention aims at the above-mentioned problems, and provides a method for preventing and treating saprolegniasis during the hatching of Chuanshan Zheluo salmon eggs. A phenomenon that occurs in a large area in a short period of time

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  • Prevention and treatment method of saprolegniasis in incubation period of hucho bleekeri fertilized eggs
  • Prevention and treatment method of saprolegniasis in incubation period of hucho bleekeri fertilized eggs

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Embodiment 1

[0019] A method for preventing and treating saprolegniasis during the hatching of Chuanshan Zheluo salmon eggs, comprising the following steps: on the second day of hatching from the fertilized eggs, soaking once a day in running water containing formaldehyde, wherein the concentration of formaldehyde in the running water is 475ppm; make the soaking liquid enter from the bottom of the incubator and discharge from the upper part of the incubator. Proceed under conditions of light and avoid vibration. After 30 minutes, use normal hatching water for running water incubation. When the fertilized eggs develop to the eye stage (the average incubation temperature is 7.5°C, and the accumulated temperature reaches 150°C), the formaldehyde disinfection is stopped; dead eggs are removed manually until the fertilized eggs emerge from the membrane.

Embodiment 2

[0021] A method for preventing and treating saprolegniasis during the hatching of Chuanshan Zheluo salmon eggs, comprising the following steps: on the second day of hatching from the fertilized eggs, soaking once a day in running water containing formaldehyde, wherein the concentration of formaldehyde in the running water is 450ppm; make the soaking liquid enter from the bottom of the incubator and discharge from the upper part of the incubator. The flow rate is 25L / min. 10,000 grains, so that the eggs will not roll over due to excessive flow rate. Each time lasts for 30 minutes. During the soaking process, avoid light and vibration under the conditions. After 30 minutes, normal hatching water was used for running water incubation. When the fertilized eggs developed to the eye stage (the average hatching temperature was 7.5°C, and the accumulated temperature reached 127°C), formaldehyde disinfection was stopped; dead eggs were removed manually until the fertilized eggs emerged ...

Embodiment 3

[0023] A method for preventing and treating saprolegniasis during the hatching of Chuanshan Zheluo salmon eggs, comprising the following steps: on the second day of hatching from the fertilized eggs, soaking once a day in running water containing formaldehyde, wherein the concentration of formaldehyde in the running water is 500ppm; make the soaking liquid enter from the bottom of the incubator and discharge from the upper part of the incubator. The flow rate is 15L / min. 10,000 grains, so that the eggs will not roll over due to excessive flow rate. Each time lasts for 30 minutes. During the soaking process, avoid light and vibration under the conditions. After 30 minutes, use normal hatching water for running water incubation. When the fertilized eggs develop to the eye stage (the average incubation temperature is 7.5°C, and the accumulated temperature reaches 170°C), the formaldehyde disinfection is stopped; dead eggs are removed manually until the fertilized eggs emerge from ...

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Abstract

The present invention discloses a prevention and treatment method of saprolegniasis in an incubation period of hucho bleekeri fertilized eggs. The method comprises the following steps: from the second day of incubation of the fertilized eggs, the fertilized eggs are soaked using running water containing formaldehyde every day; soaking liquid enters form the bottom of an incubator and is discharged out from the top of the incubator, a flow rate is controlled, so that the fertilized eggs do not roll over due to the excessive flow rate, the operation is continuously conducted for 30 min each time, and in the soaking process, the operation is conducted in dark place without vibration. After 30 min, normal incubation water is used to conduct running water incubation, and in the stages from the development of the fertilized eggs to early incubation (at an average incubation temperature of 7.5 DEG C and an accumulated temperature reaching 127 DEG C-170 DEG C), formaldehyde disinfection is stopped. Artificial methods are used to remove dead eggs until the fertilized eggs come out from membranes. The method is used to conduct the disinfection of the hucho bleekeri fertilized eggs, the incidence of the saprolegniasis can be reduced by 80% or more, and the deformity rate can be reduced to be 3% or below after emergence by using the method,.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for preventing and treating saprolegniasis during hatching of Chuanshan Zheluo salmon eggs. Background technique [0002] Hucho bleekeri belongs to Salmo niformes, Salmonidae, Salmonidae, genus Hucho, formerly known as Hujia fish, Changjiang salmon, Bleekeri salmon, Bleekeri salmon, etc.; local common name : Cat fish, Hujia fish (Sichuan, Qinghai) and strip fish (Shaanxi), etc., belong to the large salmonids unique to the upper reaches of the Yangtze River, and are also the only large indigenous salmonids in the Qinghai-Tibet Plateau, and are national second-level aquatic species. As a wild protected animal, in the China Biodiversity Conservation Plan proposed in November 1992, Sichuan-Shaanxi salmon was included in the list of Class I fish priority protection species, ranking fourth after white sturgeon, Chinese sturgeon, and Dabry's sturgeon. In the "Red Data Bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/13
CPCA01K61/00Y02A40/81
Inventor 李强杜军李华赖见生刘亚林珏褥勇生
Owner FISHERIES INST SICHUAN ACADEMY OF AGRI SCI
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