Penaeus vannamei breeding method based on detection of enterocytozoon hepatopenaei infection dose

Abstract

The invention discloses a penaeus vannamei breeding method based on detection of enterocytozoon hepatopenaei infection dose, and belongs to the technical field of penaeus vannamei breeding. According to the method, the infection dose of enterocytozoon hepatopenaei is regularly monitored in the whole culture period of the penaeus vannamei boone, and different culture measures are adopted for different infection doses. According to the method, high-quality shrimp seeds are selected for centralized thickening, pathogen indexes including enterocytozoon hepatopenaei are monitored regularly, and the shrimp seeds are cultivated in different pools after the shrimp seeds are subjected to thickening about one month and each item is detected to be qualified, so that compared with the technology of directly putting the shrimp seeds, on one hand, the cost is reduced through centralized management, and on the other hand, the risk of later-stage cultivation caused by missing detection of low disease-carrying rate of the shrimp seeds can be reduced. The vigor and ingestion growth conditions of the shrimps are observed at any time in the culture period, enterocytozoon hepatopenaei pathogens are monitored regularly, real-time fluorescent quantitative detection is supplemented if positive results are detected, treatment is carried out according to the method disclosed by the invention according to the culture period, the specification state of the shrimps and quantitative detection data, and the economic loss is reduced.

Description

technical field [0001] The application relates to the technical field of Penaeus vannamei culture, in particular to a culture method of Penaeus vannamei based on the detection of Enterococcus hepatica infection. Background technique [0002] Penaeus vannamei is the prawn species with the largest farming output in the world. Its farming is mainly distributed in 38 countries and regions including South America and Southeast Asia. The global annual output of Penaeus vannamei is about 5 million tons. my country's vannamei aquaculture and freshwater aquaculture are widely distributed, of which freshwater aquaculture is concentrated in 6 provinces and cities of Guangdong, Jiangsu, Fujian, Zhejiang, Shandong, and Tianjin, accounting for nearly 90% of the country's output; marine aquaculture is concentrated in Guangdong, Guangxi, Fujian, and Hainan , Shandong 5 provinces, the output accounts for more than 90% of the country. In 2020, the total output of Penaeus vannamei aquaculture ...

AI Technical Summary

Problems solved by technology

Among them, direct placement can reduce operations and reduce secondary environmental stress. Standard seedlings have the advantages of small use area, convenient centralized management, shortened breeding cycle, improved pond utilization rate, and reduced energy consumption costs. However, disease prevention and control is difficult. Seedlings need to undergo secondary environmental adaptation, and there are certain risks in improper operation

[0004] In the breeding process, seedlings, water quality, feed quality and management techniques are important factors that determine the success or failure of breeding, among which the quality of seedlings is the most critical, and the germplasm traits of seedlings Common pathogen carrying conditions have become the main screening items when farmers purchase seedlings. At present, farmers choose high-quality first-generation shrimp seedlings for breeding, and their growth and other traits have great advantages; seed pathogen quarantine has become an important method for seed selection. The seedlings that pass the quarantine can greatly reduce the risk of breeding, but the representativeness of seedling sampling samples can cause missed inspections, especially the pathogen of enterocystosis prawns is mostly carried by individuals. If the missed inspections are caused by insufficient sampling representativeness, It will lead to the horizontal transmission of pathogens during the breeding process, and the outbreak of enterocystosis hepatica, causing slow growth of prawns, seriously affecting the size and yield of adult shrimps

In addition, currently there is no effective control drug for Enteroplasma hepatica. How to deal with Enterosporidia hepatica is detected during the breeding process (especially in the middle and late stages of breeding), which has become a major problem for farmers.

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