Efficient health method for raising larvae of Litopenaeus vannamei

A high-efficiency technology of Penaeus white shrimp, applied in climate change adaptation, animal feed, animal feed, etc., can solve the problems of reduced survival rate and growth rate, low survival rate, slow growth of larvae in nursery ponds, etc., to improve seed quality, Effects of low seedling survival rate and high bacterial content

Pending Publication Date: 2017-05-31
ZHEJIANG MARICULTURE RES INST
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  • Abstract
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  • Claims
  • Application Information

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 bat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In the Qingjiang base of the Zhejiang Provincial Institute of Marine Aquaculture, the seedling water body was heated to 29°C after sedimentation, sand filtration, microfiltration and ultrafiltration. The seedling ponds were covered with plastic films for heat preservation, and the heater was turned on at the same time to heat the air. The air filtered through the 15um sieve silk screen is used as water oxygenation after being passed through the blower and the inflatable pipe; the golden algae is inoculated the day before the larvae are put in, and the algae cell concentration in the seedling pond after inoculation is 2.45×10 4 cell / ml, put 10ppm of bacillus at the same time; the density of nauplii is 220,000 tails / m 3 , put 2 nursery ponds at a time. The above steps were repeated, and the larvae were released in 8 times in one workshop.

[0038] Water environment conditions for seedling raising: under natural light conditions, the light intensity is 5000-15000Lux, the ...

Embodiment 2

[0044] The difference from implementation example 1 is:

[0045] After inoculation, the algae cell concentration in the seedling pool was 3.26×10 4 cell / ml, the light intensity is 6000-18000Lux, the initial salinity is 30.6‰, and the stocking density of nauplii is 180,000 / m 3 , larvae were put in 6 times in a workshop, and the humidity in the workshop was 4.35﹪~14.12﹪ during the seedling raising period.

[0046] Seedling results are as follows:

[0047] The pH value is stable at 8.0-8.5, the concentration of ammonia nitrogen is less than 0.2mg / L, and the concentration of nitrite nitrogen is less than 0.02mg / L. The survival rates of the 6 batches of seedlings are 70.4%, 76.2%, 61.3%, 64.6%, 75.2%, and 63.7%, respectively. %, the time from the zodiac stage I to the larval stage I was 8.1d, 8.0d, 8.9d, 8.5d, 8.0d, 8.6d. The tests of WSSV (Shrimp White Spot Virus), TSV (Taura Virus), IHHNV (Infectious Subcutaneous and Hematopoietic Necrosis Virus), YHV (Yellow Head Virus), and ...

Embodiment 3

[0049] The difference from implementation example 1 is:

[0050] After inoculation, the algae cell concentration in the nursery pool was 3.95×10 4 cell / ml, light intensity 5000-20000Lux, initial salinity 31.5‰, stocking density of nauplii 250,000 / m 3 , larvae were placed in 4 times in a workshop, and the humidity in the workshop was 6.35﹪~14.96﹪ during the seedling raising period.

[0051] After the fourth stage of larvae, when the desalination standard is carried out in Xiaoshan, Zhejiang, water bodies close to the water quality of pond culture are obtained. Under the condition that no pathogens are detected, no disinfectants and antibiotics are used for treatment, and the salinity is adjusted to 15 with brine. ‰, introduce the cultivation pond as the initial desalination standard crude water, and start desalination after the shrimp seedlings adapt to the new environment and stabilize.

[0052] Seedling results are as follows:

[0053] To the specifications of the larvae s...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): A01K61/59A23K50/80A23K10/30A23K10/20
CPCY02A40/81
Inventor 谢起浪柴雪良闫茂仓胡利华吴乐生冀德伟黄贤克曾国权张炯明陈琛於俊琦李小勇郑金和
Owner ZHEJIANG MARICULTURE RES INST
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