Efficient health method for raising larvae of Litopenaeus vannamei

Abstract

The invention discloses an efficient health method for raising larvae of Litopenaeus vannamei, comprising the steps of (1) controlling the ambient in a raising shop, including air filtration, and humidity control via heat exchange; (2) controlling raising water quality, filtering raising water, inoculating single-celled algal liquid and probiotic under natural light intensity to carry out second water quality control, and culturing organisms as bait; (3) controlling larval quality, to be specific, treating the raising water body not with a disinfectant and antibiotics, raising larvae at the low temperature of 29 DEG C, performing low temperature resistant domestication on post-larvae, starting to feed with artificial formula feed from mysis stage which is mainly made with single-celled algae and fairy shrimp, performing mimic ecological desalination growing, and performing whole-course pathogen detection, including larvae raising water, feed, larvae and young shrimps. The method of the invention has the advantages that raising water quality and workshop ambient can be improved with no drug added, circulation of a raising pond is improved, success rate and growth rate in larval raising are increased, and the raised larvae have good quality and high adaptability.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, in particular to an efficient and healthy breeding method for Penaeus vannamei. Background technique [0002] Shrimp farming is the pillar industry of my country's aquaculture industry. In recent years, the area of ​​prawn farming in my country has stabilized at about 360,000 hectares, with an annual output of about 1.3 million tons, forming a relatively complete industrial system from seedlings, breeding to processing, distribution, and production of supporting feed. Breeding and production got rid of poverty and embarked on the road of becoming rich. [0003] However, the existing seedling technology has many problems such as seed quality and safety, carrying pathogens, drug residues, high-temperature seedling cultivation, and drug preservation, which are mainly manifested in: [0004] 1. Environmental problems in raising seedlings: Penaeus vannamei has a strong seasonality in breeding, an...

AI Technical Summary

Problems solved by technology

[0004] 1. Environmental problems in raising seedlings: Penaeus vannamei has a strong seasonality in breeding, and generally two crops are raised each year. The peak breeding periods of each year are concentrated in March to May and July to August, and the low temperature period is from March to May each year. Penaeus vannamei nursery should be carried out in a closed nursery workshop by heating and adding artificial bait. The humidity in the workshop is high, and bacteria grow rapidly. The water body has a high bacterial content, and the water quality of the nursery pool is easily deteriorated, which in turn affects the growth and survival rate of the larvae. At the same time, in order to avoid cross-infection between the nursery pools in the workshop, only one batch of larvae is often placed in a workshop nursery pool at the same time. , put the larvae in batches immediately, and the larvae in the nursery ponds where the larvae are put in later batches grow slowly and have a low survival rate. survival rate and growth rate

[0005] 2. Problems in raising seedling water: In order to improve economic benefits, a large number of chemical drugs such as disinfectants and antibiotics are used or the temperature of seedling raising water is raised to above 33°C to increase the survival rate of larvae, resulting in enhanced drug resistance of larvae and the quality of seedlings and the survival rate of breeding. decline, the use of disinfectants and antibiotics destroys the normal flora of the seedling water body, it is difficult for the probiotic flora to form an advantage, and the explosive growth of drug-resistant flora finally makes the total number of bacteria in the seedling water body unable to be effectively controlled