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Method for preventing and controlling shrimp infectious disease by using Trachinotus ovatus

An oval pomfret and contagious technology is applied in the field of prevention and control of infectious diseases of shrimps, which can solve the problems of shrimp death and breeding failure, and achieve the effects of reduced use, reduced breeding costs, and reduced workload.

Inactive Publication Date: 2011-06-22
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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Examples

Experimental program
Comparison scheme
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, 90,000 tails per mu.

[0023] 2. Put oval pomfret at the right time. The prawns are raised to 0.5 grams, and the oval pomfrets are put in before the outbreak of prawn diseases. During the breeding process, often due to the reasons of the shrimp seedlings themselves, large-scale deaths occurred in the early stage of breeding, and there was no need to stock the pomfret before. Therefore, it is preferred to breed to 0.5 grams. After the shrimp seedlings are stabilized, the egg-shaped pomfrets can be put in; the number of egg-shaped pomfrets to be put in should not be less than 20 tails / mu, and can be appropriately increased according to the density of stocking shrimp seedlings, but no more than 30 Tail / mu; the size of ovoid pomfret should not be less than 0.25kg / tail, because the food intake of oval pomfret with a specification of less than 0....

Embodiment 2

[0026] Beginning in July 2010, in three breeding farms in Dongfang City and Ledong County, Hainan Province, the pond water surface area totaled 163 mu, of which 70 mu used the patented technology and 93 mu used 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, put in 25 tails of grouper with a weight of 0.15-0.35 kg / mu, and it will be cultured for 90-100 days. There was no outbreak of infectious diseases of prawns. In October, 70 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, 32 mu of the 93 mu of prawns cultured with the general farming method had to be drained due to the outbreak of WSS, with a draining rate of 34.4% and a success rate of 65.6%.

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Abstract

The invention belongs to the field of aquaculture and relates to a method for preventing and controlling a shrimp infectious disease by using Trachinotus ovatus. The method comprises the following steps of: throwing 80,000 to 100,000 prawn seeds into per mu of a sea area with high-salinity seawater; and when each prawn is bred to be 0.3 to 0.7 gram, throwing 20 to 30 pieces of the Trachinotus ovatus into per mu of the sea area with high-salinity seawater, wherein each piece of the Trachinotus ovatus is 0.15 to 0.35 kilogram. A large number of tests prove that the Trachinotus ovatus of 0.15 to 0.35 kilogram eats the prawns dying of illness in a prawn culture pond, and the probability of eating the healthy prawns is very small due to the habits of the healthy prawns. The problem of low survival rate of the cultured prawns because the healthy prawns are eaten is solved.

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-species 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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IPC IPC(8): A01K61/00
CPCA01K61/00A01K61/13A01K61/59Y02A40/81A01K61/10
Inventor 何建国陈锚陈勇贵翁少萍刘贤武
Owner SUN YAT SEN UNIV
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