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Method for preventing and controlling shrimp communicable diseases by Epinephelus coioids

An infectious technology for slanted grouper, applied in the field of prevention and control of shrimp infectious diseases, can solve problems such as shrimp death and breeding failure, reduce workload, reduce breeding costs, and benefit the protection of the ecological environment Effect

Active Publication Date: 2011-09-21
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of prawn farming, due to the difference in individual disease resistance, some prawns with weak physique and poor disease resistance are more sensitive to changes in the external environment. Sexual pathogens (bacteria / viruses) spread within the shrimp colony, causing more shrimp to die, and eventually the culture fails

Method used

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Experimental program
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Effect test

Embodiment 1

[0022] 1. Comparing with the normal management method of prawn farming, after cultivating the water, put in about 1.0cm shrimp seedlings, 80,000 to 100,000 tails per mu.

[0023] 2. Put the grouper in time. When the prawns reach 0.5 g, put the grouper before the outbreak of the prawn disease. During the breeding process, often due to the reasons of the shrimp seedlings themselves, large-scale deaths occurred in the early stage of the breeding, and there was no need to put the grouper. Therefore, it is preferred to breed to 0.5 grams, and after the shrimp seedlings are stable, put in the grouper; the number of grouper to be put in should not be less than 15 tails / acre, and can be appropriately increased according to the density of the seedlings stocked, but at most No more than 20 fish / mu; the size of grouper is 0.10~0.15kg.

[0024] 3. Except that the present invention has specific requirements on the salinity of the culture water and the specification, quantity and time of ...

Embodiment 2

[0026] Beginning in August 2010, in two breeding farms in Dongfang City and Changjiang County, Hainan Province, the total water surface area of ​​the pond is 185 mu, of which 90 mu use this patented technology and 95 mu use the general breeding method. The stocking density of Litopenaeus vannamei is 80,000 tails / mu, and it will be cultured for 20-30 days. When the weight of the prawns is about 0.5 grams, 20 tails of oblique grouper with a weight of 0.10-0.15 kg / mu will be fed for 90-110 days. There was no outbreak of infectious diseases of prawns. In November, 90 mu of prawns were cultivated using this patented technology to reach the market size of 70-80 tails / kg, and the breeding success rate was 100%. At the same time, 23 mu of the 95 mu of prawns cultured by the general farming method were forced to drain ponds due to the outbreak of WSS, with a pond drainage rate of 24.2% and a success rate of 75.8%.

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Abstract

The invention belongs to the field of aquaculture and relates to a method for preventing and controlling prawn communicable diseases by Epinephelus coioids. The method comprises the steps of: releasing young prawns in high-salinity seawater, wherein the releasing amount is 80,000-10,0000 fish per mu (mu refers to a unit of area); when the prawn is cultivated to 0.3-0.7 gram, releasing the Epinephelus coioids into the seawater, wherein the weight of each Epinephelus coioids is 0.10-0.15 kg, and the releasing amount of the Epinephelus coioids is 15-20 fish per mu. Large amount of experiments prove that: the Epinephelus coioids about 0.10-0.15 kg in weight can eat ill and dead prawns in a culture pond, the probability of eating healthy prawns is very little due to the habit of the healthy prawns. According to the characteristic, the problem that the survival rate of the bred prawns is low because the healthy prawns are eaten is solved, and simultaneously, the prawn communicable diseases are effectively prevented and controlled.

Description

technical field [0001] The invention belongs to the field of aquaculture and relates to a method for preventing and controlling shrimp infectious diseases. Background technique [0002] Shrimp is one of the most important aquatic economic animals in the world. It is one of the most active species in international trade. It is also an advantageous species for the export of aquatic products in my country. In 2009, the aquaculture output was 1.303 million tons, the export volume was 188,000 tons, and the export value was 1.23 billion US dollars. The output value exceeds 30 billion yuan. The export volume of single-variety general trade ranks first. [0003] With the rapid development of the shrimp farming industry, China has once again become the world's largest shrimp farming country. However, due to objective reasons such as the degradation of seedling quality, the blind increase of breeding density, the pollution of seawater, the abuse of drugs, irrational nutrition, and po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCA01K61/005A01K61/00A01K61/13A01K61/59Y02A40/81
Inventor 何建国陈锚陈勇贵翁少萍刘贤武
Owner SUN YAT SEN UNIV
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