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A preparation for preventing and treating saprolegniasis

A technology for bare crack and saprolegnia, which is applied in the field of preparations for the prevention and control of fish saprolegnia on the Tibetan Plateau, and can solve problems such as mechanical damage to the fish body, growth of saprolegnia, and damage to the fish body.

Active Publication Date: 2022-04-19
西藏自治区农牧科学院水产科学研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water temperature for fish farming in Tibet: 9-20°C, the water temperature is within the range where Saprolegnia is prone to outbreaks. Fish in the Tibetan plateau are prone to mechanical damage during fishing and transportation, leading to outbreaks of Saprolegniasis; in addition, wild fish carry more parasites , the growth of parasites causes damage to the fish body, leading to an outbreak of saprolegniasis
During the breeding process of fish on the Tibetan plateau, the parents were injected with oxytocic agents, eggs and semen, which caused mechanical damage to the fish body, thus breeding saprolegniasis
In the process of fish farming in Tibet, as the size of the farmed fish becomes larger, it is necessary to divide them into ponds in time, which is easy to cause mechanical damage during the transfer process, resulting in the outbreak of saprolegniasis

Method used

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  • A preparation for preventing and treating saprolegniasis
  • A preparation for preventing and treating saprolegniasis
  • A preparation for preventing and treating saprolegniasis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Preparation of seabuckthorn extract

[0045] 1) Sea buckthorn fruit processing

[0046] Pre-freezing stage: Put 10kg of fresh, natural color and disease-free seabuckthorn fruits after washing into the freezing tray for pre-freezing, the temperature is -38°C;

[0047] Sublimation drying stage: Vacuumize the vacuum freeze dryer for 15 minutes, then control the temperature of the heating shelf to 40°C, and control the temperature of the material to -30°C to provide sublimation latent heat, the vacuum degree is 30pa, and the time is 35h;

[0048] Analytical drying stage: During the sublimation drying process, the free water in the seabuckthorn fruit is removed. In order to further remove the bound water, the temperature of the material is controlled at 48±3°C; When the curve and the internal temperature curve of the material tend to be consistent, continue drying for another 2 hours;

[0049] Pulverizing: pulverizing the seabuckthorn fruit after vacuum freeze-dr...

Embodiment 2

[0056] The preparation of embodiment 2 preparation

[0057] Add 69g of the preparation of the present invention in every 1L of water, obtain the preparation powder according to the mixed salt shown in Table 1, baking soda, seabuckthorn extract, salicylic acid and astaxanthin nanoparticles respectively, prepare preparation A, preparation B, preparation C, Formulation D, Formulation E.

[0058] Table 1 Preparation composition list

[0059]

Embodiment 3

[0060] Example 3 Preparations Control Experiments on Saprolegniasis

[0061] (1) Material preparation

[0062] Purchase 500 Lhasa nudibranch fishes with uniform body size, about 1kg in weight, and suffering from saprolegniasis from the farm, and divide them into 10 groups randomly, namely preparation A group, preparation B group, preparation C group, preparation D group and preparation E group, compared with one group, compared with two groups, compared with three groups, compared with four groups, blank control group.

[0063] Table 2 The composition list of the preparations of the comparison group and the control group

[0064]

[0065] (2) Test

[0066] 10 groups of Lhasa naked schistos were reared separately, and 69g of the preparation was added to the breeding water at 6:00 am and 7:00 pm every day for 10 days, and the number of illnesses and mortality in each group was counted. The results are as follows: table 3.

[0067] Table 3 Results comparison table

[0068...

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Abstract

The invention provides a preparation for preventing and treating saprolegniasis of fish on the Tibetan Plateau, which comprises salt, baking soda, seabuckthorn extract, salicylic acid and astaxanthin nanoparticles, and the seabuckthorn extract comprises 2:1 Sea Buckthorn Fruit Extract and Sea Buckthorn Leaf Extract. The saprolegniasis prevention and control preparation for fish in the Tibetan Plateau of the invention can effectively prevent and control the saprolegniasis and reduce the death rate.

Description

technical field [0001] The invention relates to the technical field of fish breeding, in particular to a preparation for preventing and treating saprolegniasis of fish on the Tibetan plateau. Background technique [0002] Saprolegnia, Achlya, Aphanomyces and Dictyuchus in the family Saprolegniacae cause. Saprolegniasis hyphae are tube-shaped polynuclear bodies without transverse septa, generally attaching to the injured part of aquatic animals like roots, with many and slender branches, which can penetrate into damaged and necrotic skin and muscles, called internal hyphae, which have the ability to absorb nutrients The function; protruding outside the body is called the outer hyphae, the mycelium is thicker, less branched, up to 3cm long, forming gray-white cotton flocs visible to the naked eye. The occurrence of saprolegniasis is mainly due to the secondary infection caused by the emergency. The fish body surface tissue is injured only due to crowding, moving or other adv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K36/185A61K9/51A61P31/10A61K31/60A61K31/122
CPCA61K36/185A61K31/60A61K31/122A61K9/51A61P31/10A61K2236/17A61K2236/15A61K2236/333A61K2236/19A61K2236/331A61K2300/00
Inventor 曾本和周建设闫志强
Owner 西藏自治区农牧科学院水产科学研究所