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Application of biological control methods for copepods in sea area cage seedlings of japonicus japonicus

A technology of biological control and copepods, applied in application, climate change adaptation, fish farming, etc., can solve the problems of reducing the yield of japonicus japonicus seedlings and affecting the survival rate of ginseng seedlings, achieving zero drug residues and improving survival rate, increase the effect of production

Active Publication Date: 2018-07-31
大连市水产技术推广总站
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Problems solved by technology

[0005] In order to solve the problem of the large number of copepods affecting the survival rate of japonicus seedlings and reducing the yield of japonicus japonicus seedlings in the process of raising sea cucumber seedlings in net cages, the present invention provides effective control of the number of copepods in the net cage, thereby improving the survival rate, A biological control method without drug residues

Method used

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  • Application of biological control methods for copepods in sea area cage seedlings of japonicus japonicus

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0020] Shrimp seed selection: Purchase SPF vannamei seedlings from the designated nursery room, and select shrimp seedlings with a size of 0.8 cm or more.

[0021] Cage settings: Cage specifications: 5m*5m*4m, along the direction of the ocean current, use a double-layer sieve roll net with 200 mesh lining and 40 mesh mesh. The depth of the cage can be selected according to the depth of different sea areas. The principle is that the distance between the bottom of the net and the bottom of the seabed is greater than 2 meters when the tide is low. On the basis of the traditional sea cucumber seedling cages, a 200-mesh lined 40-mesh sieve roll net is used along the direction of the ocean current. In principle, the number of meshes on the net should be selected to ensure that the shrimp seedlings cannot swim out from the mesh.

[0022] Temporary culture of shrimp seedlings: The salinity of Penaeus vannamei seedlings of 0.6-0.8 cm is raised in the nursery room at a salinity of 20-25...

Embodiment 1

[0025] According to the traditional net cage breeding method in sea area, ginseng spawning is carried out, and the density of fertilized eggs is controlled at 20-30 grains / ml, hatched; larvae are cultivated, and the conditions for larvae cultivation are: temperature 19°C-23°C, salinity 30-33 , Dissolved oxygen 3.5-5.5mg / L, PH 7.9-8.2, all in line with the water quality indicators of natural sea areas.

[0026] When the planktonic period of sea cucumber seedlings ended and the attachment was complete, the experiment was carried out.

[0027] Experimental group 1, did not administer drugs or shrimp seedlings in the late stage of nursery; experimental group 2, administered drugs to control copepods in the late stage of seedlings; experimental group 3, put Penaeus vannamei seedlings in the late stage of seedlings to control copepods, and finally calculated The number of copepods, the survival rate of ginseng seedlings, and the discoloration rate of juvenile ginseng.

[0028] The ...

Embodiment 2

[0031] Determination of the number of shrimp seedlings.

[0032] The early stage of the cultivation process is the same as that of Example 1, and the difference in the later stage is mainly after the ginseng seedlings have basically attached completely after the planktonic stage, and the corresponding number of shrimp seedlings are put in according to different shrimp seedling densities, and the follow-up experiment of controlling copepods by Penaeus vannamei seedlings is carried out.

[0033] When the planktonic period of sea cucumber seedlings ended and the attachment was complete, the experiment was carried out. On the premise of confirming that the control effect of Penaeus vannamei seedlings on copepods is still good, a related experiment was carried out on the tail number of Penaeus vannamei seedlings.

[0034] Experimental results show that 0.2 tails / m 3 Shrimp seedling group, the number of copepods is 320 / m 3 ;0.8 tail / m 3 In the shrimp seedling group, the number of...

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Abstract

The invention discloses a method for applying biological prevention and control over copepoda in the cage farming process of stichopus japonicas in a sea. According to the biological prevention and control method for the copepoda in the cage farming process of the stichopus japonicas in the sea, SPF penaeus vannamei boone fry with the specification of 0.6-0.8 cm are purchased, after the SPF penaeus vannamei boone fry adapt to the salinity change in the net cages with the specification of 5 m*5 m*4 m, temporary keeping and thickness marking are conducted, the temporary keeping density does not exceed 10000 / m<3>, the proper net cages are arranged according to production needs to conduct temporary keeping, in the later period of temporary keeping, frozen halogen insects can be adopted for feeding or a plankton net can be adopted for fishing planktons such as the copepoda to conduct two times of feeding in one day, after stichopus japonicus fry are basically attached, the specification of the SPF penaeus vannamei boone fry reaches 1-1.2 cm, and 80-100 fry can be put into each production net cage, the number of the copepoda can be effectively controlled in the later stage of fry breeding, and therefore the yield of the fry is increased.

Description

technical field [0001] The invention relates to a method for biological prevention and control of copepods, in particular to a method for preventing and controlling copepods in the process of raising seedlings in net cages in sea cucumbers. Background technique [0002] As the pillar species of marine aquaculture in our province, sea cucumber has a breeding area of ​​nearly one million mu, and more than 2 billion seedlings are needed every year. At present, the source of seeds required by sea cucumber breeding enterprises is mainly provided by industrial nursery rooms. In the process of indoor seed production, some enterprises use a large number of antibiotics and disinfectants in order to increase the output per unit area and pursue economic benefits, and even use prohibited The seeds produced are of poor quality, weak adaptability to the environment, and poor disease resistance. After the seedlings were put in, the survival rate was low and the quality of the adult ginsen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/30A01K61/59
CPCY02A40/81
Inventor 刘彤孙阳陈文博宋晓阳郝佳杨婷婷周竹君姜成斌纪卫东
Owner 大连市水产技术推广总站
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