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Method for controlling saprolegniasis of odontobutis obscura germ cells in incubation period

A control method and technology of fertilized eggs, which are applied in the field of fish farming, can solve the problems of wasting resources, small seed quantity, and low hatching rate, and achieve the effect of strong physique and no damage to the body surface

Inactive Publication Date: 2013-03-06
南京市水产科学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been small-scale reports on the artificial propagation technology of sand pond snakehead, but in the process of existing propagation methods, saprolegniasis will occur under low temperature conditions or a large amount of disinfectants will be used, and the defects are low hatching rate and small amount of seedlings produced , extremely unstable and wastes a lot of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] 1. Breeding of broodstock

[0079] 1.1. Requirements for broodstock

[0080] Second-year-old fish are used as parents, the ratio of male to female is 1.0:1.2, and natural wild fish species are caught or collected directly from the market during the breeding period.

[0081] 1.2. Transportation of broodstock

[0082] Transportation with water plants in plastic buckets

[0083] 1.3. Holding pool

[0084] a Water source, water quality

[0085] The water source is sufficient, there are no pollutants that pose a threat to the breeding environment in the breeding area, the drainage and irrigation are convenient, the inlet and outlet are separated, and the water quality indicators should meet the regulations of NY5051;

[0086] b Pond condition

[0087] The area of ​​each pond is 1334㎡, the water depth is 1.0 m, there are a few aquatic plants in the pond, the mud at the bottom of the pond is 10cm-15cm, and the slope ratio of the pond is 1:2.0-2.5;

[0088] The bottom qua...

Embodiment 2

[0106] The artificial fish nest cleaned and disinfected in Example 1 is hung in the hatching bucket with a thin nylon rope for hatching. The hatching bucket is an ordinary square plastic bucket with a volume of 160L, and the specification is 0.8 m×0.6 m×0.6 m. The hatching water is tap water filtered through 100-120 mesh gauze and fully aerated. 1% available iodine) was splashed and disinfected, eggs laid on the same day were hung in each bucket, and the egg density was 20,000 to 50,000 eggs per cubic water body; one air-filled stone was hung in each bucket, and the air was inflated for incubation. The air flow rate was 5L / min, and the hatching water temperature was 20 ~22°C. During the incubation period, the water was changed every 7 days, and the amount of water was changed by 50% each time. During the day, the hatching buckets were covered with coverings, and the coverings were removed at night; the development of eggs was checked every day. After 35 days, the fertilized e...

Embodiment 3

[0108] The artificial fish nest after cleaning and disinfection in Example 1 is hung in the hatching barrel with a thin nylon rope to hatch. The hatching bucket is an ordinary square plastic bucket with a volume of 160L, and the specification is 0.8m×0.6m×0.6m. The hatching water is tap water filtered through 100-120 mesh gauze and fully aerated, and 5 mg / L polydimensional copper iodine solution ( 1% available iodine) is splashed and disinfected, eggs laid on the same day are hung in each bucket, the egg density is 20,000 to 50,000 eggs per cubic water body, one aerated stone is hung in each bucket, inflated for incubation, and the air flow rate is 5L / min. The hatching water temperature is controlled between 25-28°C by using a heating rod. During the incubation period, the water is changed every 7 days, and the water volume is 50% each time; the hatching bucket is completely covered with a cover during the day, and the cover is removed at night; the egg development is checked ...

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PUM

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Abstract

The invention relates to a method for controlling saprolegniasis of odontobutis obscura germ cells in incubation period. The method comprises the steps: 1, firstly, cleaning and disinfecting an artificial fish spawning nest containing germ cells, and then placing the artificial fish spawning nest into a cleaned and disinfected incubation bucket; 2, adding the aerated tap water into the incubation bucket as incubation water for incubation, controlling the incubation temperature to be 20-28 DEG C in incubation, controlling the air oxygen flow rate to be 3.5-20L / min, replacing one third to half incubation water every 4 to 7 days; and entirely covering the incubation bucket with a covering object in days, and removing the covering object at night; and 3, breaking the membrane and emerging from the germ cell after 30-40 days. Before the germ cells are transferred into the incubation bucket, the germ cells and the incubation bucket are disinfected, and incubation water used in incubation process is disinfected; and the generation of saprolegniasis of odontobutis obscura germ cells under low-temperature condition can be effectively controlled by utilizing the biological characteristic that the odontobutis obscura germ cells has larger stickiness, and through controlling the output of an aerated pump, and proper incubation conditions are created as far as possible in the incubation process.

Description

technical field [0001] The invention belongs to the technical field of fish breeding, and in particular relates to a method for controlling saprolegniasis during the incubation period of fertilized eggs of sandfish. Background technique [0002] Odontobutis obseura (Odontobutis obseura) belongs to Perciformes, Odontobutis obseura, and Odontobutis genus. It is commonly known as Pu fish, Tubu fish, tiger head shark, and tiger head nerd. It is a small carnivorous fish that lives on the bottom of freshwater. Distributed in the middle and lower reaches of the Yangtze River, Qiantang River, Minjiang River and other water systems. Channa has few thorns, tender meat, and delicious taste. With the continuous improvement of people's living standards in our country, the demand for Channaidae and other fish in Channaidae is increasing year by year. South Korea and other Southeast Asian countries have more demand for Channaidae in my country. Import demand is also showing a growing trend...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 陈树桥周国勤尹绍武刘炜单红
Owner 南京市水产科学研究所
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