Bile Acids for Aqua

How to improve the survival rate in winter-houses shrimp farming

How to improve the survival rate in winter-houses shrimp farming


Shrimp farming in greenhouses is a profitable model to culture penaeus vannamei, which is welcomed by more and more shrimp farmers, especially in Pearl River Delta region, with unique geographical conditions, such as warm sunshine, and remained dissipated in crust. Although the greenhouse farming is very popular, there are also many problems occurred, such as increasing outbreak of diseases, high mortality rate, high risk of breeding. Now, all the winter-houses is finished to put shrimp seed into the pond, and how to improve the survival rate is the key point the farmers pay attention to.

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5 factors to affect the survival rate in winter-houses of shrimp seed


  • Low dissolved oxygen

For winter-houses farming, the sunlight cannot be directly irradiated into the water, also in the winter with short days and long night, so the temperature of the water is relatively low, photosynthesis of algae is reduced, and oxygen production is small.

  • High rate of Ammonia nitrogen and Nitrite

Winter-houses are usually in a sealed environment, with low air pressure and sweltering heat. The toxic and harmful gases in the water are difficult to emit, and they will eventually return to the shrimp pond, which make the high concentration of ammonia nitrogen and nitrite. It will lead to bad smell and dead algae .

  • Bad water and water bottom quality

Because of the large temperature difference between the inside and outside of the winter-houses, it is not suggested to change the water frequently. In addition, residual bait and feces are deposited on the bottom of the pond, which can easily lead to the deterioration of the water bottom and the water quality.

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  • High temperature of winter-houses

It is important for winter-houses shrimp farming to control the indoor temperature, but it is also hard to control. There are continuous sunny days and strong light in winter, and the temperature in the winter-houses is likely to reach as high as 30℃ or even higher, which will make the water temperature increase accordingly. If the water quality is not good, it is easy to produce bacteria, intensify the oxygen consumption in the pond, cause no enough oxygen in the water body, and the shrimp will become ill.

  • Weak quality of shrimp seed

The shrimp seeds are physically weak. Since the shrimp farming cycle in the winter-houses is long, and the shrimp grow slowly, so the resistance to disease is poor.


How to improve the survival rate of shrimp in winter-houses


  • Choose the shrimp seed cautiously

Good shrimp seeds are in good appearance, health body color, smooth and robust body surface, strong vitality, likely to sink bottom and adherence on side, and there are obvious counter current phenomena after agitation, and the individuals are strong, the body is complete, and uniform in size.

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  • Skilled sheds and fine management

Shrimp farming in the winter-houses has poor ventilation, low sunshine, and little air exchange, so ventilation should be maintained in the winter-houses during the breeding process.

  • Change water bottom and detoxify

Shrimp is a benthic animal with high requirements on water bottom quality. Maintaining a good bottom environment is the key to shrimp farming in winter-houses.

  • Prevent and control diseases

During the autumn and winter changing stage, the temperature fluctuates greatly, and high temperatures occur occasionally. As soon as the high temperature occurs, harmful bacteria, especially pathogenic Vibrio species are likely to produce. Antibiotics can not be used for a long time in penaeus vannamei farming, otherwise it will lead to poor immunity and slow growth of the shrimp. Please you can choose Eucalyptus essential oil, mixed with shrimp feed to achieve antibacterial and anti-inflammatory in the body, non-toxic and non-irritating, and the most important is no damage to the shrimp and the water.


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  • Strengthen hepatopancreas protection during shrimp seed stage

Shrimp size 3-5cm is the most important period for the development of hepatopancreas, which is often referred to as the liver transferring stage. At this time,the hepatopancreas tissue of the shrimp is full and the outline is clear. The shrimp's feed intake will increase, and the toxins in the body will easily accumulate, which is causing the heavy burden of hepatopancreas. If the hepatopancreas is in unhealthy status, which make the liver transferring failed, or damaged in poor development, all this will affect the survival rate of shrimp seeds.

In order to help shrimp successfully pass the liver transferring period, we can feed Longchang bile acids after the shrimp begin to eat shrimp feed. Bile acids can promote the fat digestion and absorption and help shrimp for energy storage for better growth. At the same time, bile acids can also promote detoxification of the hepatopancreas to avoid toxic substances from damaging the shrimp and improve shrimp seed survival rate.

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In one word, despite the high returns and high yields of the penaeus vannamei farming in winter-houses, it is also necessary to protect the shrimp in seeds stage. Less disease in the shrimp seeds stage and health shrimp hepatopancreas will increase the survival rate of the shrimpin seeds stage.


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