High-yield incubation method of penaeus vannamei nauplius

Abstract

The invention discloses a high-yield incubation method of penaeus vannamei nauplius. The method comprises the steps that S101, environment selection: the incubation water temperature is controlled at30.5 DEG C, physicochemical indexes of water quality are regulated, and the salinity is 30-31 ppt; the pH is 8.0-8.2; the total alkali is 150-170 ppm; residual chlorine <= 0.001 ppm; the content of ammonia nitrogen, nitrite and microorganism does not exceeds standards; S102, the promotion of the incubation of the nauplius: parental shrimps are put into an incubation pond according to the density of 5 ind / m<3>, and manual spawn pushing is conducted by adopting a spawn pushing plate; S103, light lure screening: air is cut off for 1 hour, an illumination lamp with the light intensity of 350-450 lux is utilized to perform light lure to screen out N2 nauplius, and the nauplius is temporarily cultured in a nauplius temporary culturing barrel, an illumination lamp with the light intensity of 1600-1700 lux is utilized to perform light lure to screen out N5 nauplius, and air is cut off for 0.5 hour when light lure is conducted each time. By means of the method, the oosperm incubation rate is effectively improved to reach up to 96%, the malformation rate of the screened nauplius is only 2%, and qualified and healthy N5 nauplius with high yield is cultured.

Description

Technical field [0001] The invention relates to the technical field of aquatic seedling incubation, in particular to a method for incubating high-yield Penaeus vannamei nauplii. Background technique [0002] Penaeus vannamei (Penaei), also known as white-leg shrimp, white prawn or white shrimp, is native to the waters of the Pacific coast of South America, and is most concentrated along the coast of Ecuador. It is one of the three largest species of cultured shrimp in the world today. . Because of its delicious meat quality, high processing rate, wide range of suitable temperature (18-32℃), wide range of suitable salt (1-40‰), fast growth, and strong disease resistance, it has gradually become the main product in southern my country. Farm shrimp species. [0003] According to the production and development process of Penaeus vannamei, prawn larvae go through fertilized egg-cell stage-blastula stage-gastrulation stage-branch bud stage-nauplii stage-nauplii-flea larvae-mysis larvae ...

AI Technical Summary

Problems solved by technology

At present, each healthy and high-quality broodstock can produce 250,000 to 350,000 fertilized eggs per unit. Under artificial environment, many factors can cause low hatching rate of fertilized eggs, high rate of larvae deformity, and larvae appear in the breeding process. Metamorphosis out of sync, weak vitality and other bad phenomena

A lot of researches have also been done domestically. For example, Chinese patent CN106719200A discloses a method for optimizing the vannamei nauplius. Through the triple operation of disinfection, running water incubation, and light-induced elimination, the upper layer of the water body is repeatedly fished for 3 to 4 times. The larvae in the remaining barrels are eliminated, and the elimination ratio is 20-30%. Although the healthy, vigorous, and pathogen-free Penaeus vannamei nauplii can be obtained, their hatching rate and survival rate are still low. Therefore, it is necessary to design a South American A High-yield Incubation Method for the Nauplius of Penaeus albus

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