CATDOLL : CATDOLL: What should we do if Vibrio in factory-farmed whiteleg shrimp exceeds the limit?

1. What should we do if the Vibrio bacteria in factory-farmed whiteleg shrimps exceed the limit?

As the water temperature rises, the algae in the water die or the photosynthesis weakens, which can easily lead to a decrease in oxygen in the water, which is conducive to the growth of anaerobic bacteria. In addition, the suitable water temperature and the large amount of leftover bait and shrimp feces produced during the breeding process provide a breeding ground for Vibrio to reproduce rapidly, resulting in an explosion of Vibrio in the water of the winter greenhouse.

In the face of the recent unpredictable temperatures, it is recommended that friends who raise shrimps in winter sheds regularly test various water indicators and Vibrio, carry out Vibrio prevention and control work in advance, and do a good job of oxygenation, water adjustment and bottom improvement. You can spray some microbial preparations in the water in small amounts and multiple times, which can not only inhibit the growth of harmful microorganisms, but also decompose organic waste on the pond bottom.

At the same time, it is also necessary to do a good job of protecting the liver and inhibiting bacteria in the shrimp. Because most of the white shrimp infected with Vibrio have very bad livers, which are manifested as varying degrees of liver atrophy, swelling, blackening, redness, and redness of the body and intestines. This is related to the unhealthy hepatopancreas of the shrimp, so the liver must be protected during shrimp farming. The use of bile acid extracted from animal bile paste can promote the development of the shrimp hepatopancreas, improve the health of the hepatopancreas, and reduce the incidence of hepatopancreatic diseases.

For antibacterial effects in shrimps, you can choose the plant-extracted eucalyptus essential oil Lechang, which can not only inhibit the reproduction and growth of Vibrio in the shrimps, but also eliminate the inflammatory response caused by Vibrio infection, without any side effects or irritation to the shrimps.

2. I am raising white shrimp. What should I do if the water in the pond glows? What causes it?

The following content is excerpted from Sohu.com, please refer to it.

Dry goods: Reasons and treatment suggestions for "luminescence" of water bodies in shrimp farming 14:33 There are two reasons for the luminescence of water bodies in shrimp farming:

1. Caused by Vibrio luminescens, it usually occurs in the middle and late stages of shrimp farming. The characteristic is that both the water and the shrimp will emit fluorescence, especially the dead shrimp. The luminous shrimp will eat less, their tentacles will break easily, their reactions will be slow, they will often swim slowly by the pond, and die one after another.

2. It is caused by Noctiluca scintillans or Noctiluca scintillans, which mainly occurs in the hot summer. The water body has a little fluorescence at night, and the splashes of water by the aerator or bottom oxygen will be bright. The Noctiluca scintillans or worms attached to the gill filaments of the shrimp will hinder the shrimp's breathing and consume the dissolved oxygen in the water.

Treatment method:

If the cause is Vibrio luminescens:

1. Use chlorine dioxide or compound iodine solution for disinfection to kill luminous Vibrio in water bodies.

2. After disinfection, apply beneficial bacteria in time, such as spraying "Vibrio serovar" and "Yishui Le" to form the advantage of beneficial bacteria.

If it is caused by Noctiluca scintillans:

1. When the number of Noctiluca is small, zeolite powder mixed with photosynthetic bacteria and Bacillus can be applied to inhibit Noctiluca.

2. When Noctiluca scintillans reproduces in large numbers, those with good water sources can change the water appropriately. If the effect of changing the water is not ideal, you can use complex copper to kill the algae if the shrimps are in good condition. Pay attention to oxygenation and detoxification in time, and apply gold medal spores to decompose the dead algae.

(Source: Bangbang Aquatic Products Development Department-Li Fudong)

3. Can Vibrio drugs for white shrimp in aquaculture be mixed with liver protection drugs?

For aquaculture white shrimp, Vibrio drugs can certainly be mixed with liver protection, and can achieve very good results.

4. How to treat Vibrio parahaemolyticus disease in farmed shrimps?

Based on what you said, you can use shrimp synbiotics and red bacteria corps. First, the bacteria are killed, and then shrimp synbiotics are used to improve the immunity and various functions of shrimp.

5. Disadvantages of factory shrimp farming

Easy to be infected with Vibrio: Excessive Vibrio has always been a serious factor that has plagued shrimp farming. Due to the large-scale use of antibiotics, Vibrio has developed a high degree of drug resistance; shrimp livers are prone to symptoms: once shrimps are overfed, the burden on the shrimp liver will increase, causing more feces to accumulate, resulting in symptoms. At the same time, excessive levels of nitrite, ammonia nitrogen and other substances in the water will further increase the burden on the shrimp liver, causing liver lesions.