How to treat and prevent Penaeus vannamei shrimp from stealing death?

I learned a lot from the professional booking number of shrimp farming, and there are many reasons for stealing death:

1. Viral or vibrio infection.

2. Environmental deterioration and shrimp stress.

Due to the increasing density of aquaculture, in the middle and late stages of aquaculture, the substrate is often blackened, hypoxia, ammonia nitrogen, nitrite and hydrogen sulfide exceed the standard, resulting in chronic poisoning of shrimp and continuous death;

3. Long-term low oxygen or bad climate causes "inverted algae" and "pan pond", resulting in a large number of shrimp stealing death;

"Death stealing syndrome" should focus on prevention, starting from pond cleaning, water quality control, feed control and daily management.

1. Regularly change the bottom of the pond.

2. Strict treatment and control of aquaculture water. It is best to filter and disinfect the aquaculture water before use.

3. Increase the number of sewage discharge and increase the amount of water exchange. If conditions permit, it is best to build an intermediate sewage system.

4. Maintain high-quality and stable algae phase.

5. Increase the aerator and adopt a variety of aeration methods to increase the dissolved oxygen content in the water. When the hypoxia is severe, chemical aerators can be appropriately used, such as calcium peroxide, hydrogen peroxide, etc., and sprinkled throughout the pond.

6. Choose high-quality bait, strictly control the amount of bait, and feed a small amount many times.

7. Be cautious when using live bacteria in case of stealing death.

The proliferation of biological bacteria will consume the dissolved oxygen in the water body, and when the water quality is poor and the shrimp body has disease symptoms, the use of biological bacteria will increase the mortality rate of shrimp.

In short, vannamei shrimp "stealing death syndrome" is caused by a variety of factors, prevention and control measures should also start from multiple aspects at the same time, the role of a single measure is limited after all, the need to adopt a series of comprehensive prevention and control measures, strict control of all aspects of breeding, in order to achieve the expected results.

There are also a lot of deaths in the south this year, which may be due to the lack of oxygen at the bottom of the high temperature, and the bottom is changed with zeolite powder to strengthen the three-dimensional oxygenation.

The death of shrimp is caused by Vibrio bacteria, which can be mixed with some Chinese herbs for prevention and control.

How to prevent and control the disease of stealing death:

1. Vibrio control.

Vibrio reproduction conditions are low dissolved oxygen, low salinity, and high content of organic matter in water bodies. To control Vibrio in the water body, it is necessary to maintain the health and stability of the water body, and regularly fertilize the hydroponic algae to maintain the dissolved oxygen content of the water body.

2. Inhibition of salt.

The main nitrite in the water body is the intermediate product of nitrification of ammonia decomposed by the remaining organic matter in the aquaculture feed, so to control the content of nitrite in the water body, it is necessary to reduce the production of nitrite from the root.

1) Reasonable feeding of feed, try to increase the number of feeding, reduce the weight of each feeding, avoid the waste of bait, resulting in too high organic matter in the water and too high nitrite.

2) The whole process of mixing is added to Youlanbao, which can improve the intestinal health of shrimp, improve the utilization rate of feed, not only reduce the waste of feed, but also reduce the emission of ammonia nitrogen, inhibit the growth of ammonia nitrogen nitrite in the water body, and especially after 6 weeks of shrimp farming, the effect of inhibiting the increase of salt is very obvious.

3) Pay attention to regulating the pH value of the water body and maintain the pH value relatively stable.

3. Adequate oxygen supply.

When the weather is bad, pay attention to increase the oxygen supply of the oxygen supply, reduce feeding or stop eating. Maintain the algae phase health of the water body and ensure the dissolved oxygen content of the water body.

The outbreak of shrimp stealing and mortality disease reduced total shrimp production by 30 percent from 2010 to 2016, costing farmers dearly. The stealing of shrimp is caused by many aspects, so prevention should also start from many aspects, and strictly control all links. Grasp the relationship between weather, aerator, water quality, substrate and feeding, and reduce the occurrence of stealing death from the root, which plays an important role in improving the efficiency of breeding.

will freeze to death.

Penaeus vannamei can survive in waters with a water temperature of 6 to 40 °C, and the water temperature for growth is 15 to 38 °C, and the optimal water temperature for growth is 22 to 35 °C.

Tolerance to high temperature tolerance limit gradient amplitude), poor adaptability to low temperature, water temperature below 18 °C, its feeding activities are affected, lying on the bottom of the water below 9 °C, below 6 may die.

Possibly. In winter, due to the cold temperature, vannamei shrimp need to be kept in greenhouses. Litopenaeus vannamei shrimp in winter culture, shed is the most ideal, this is more conducive to the growth of vannamei shrimp.

After the vannamei shrimp enters the greenhouse, the water temperature should be kept above 23 degrees, which can maintain the normal growth of the shrimp, greatly reduce the breeding time, and the economic benefits will be particularly good. Choose the materials for building sheds, the wooden piles should be strong, the iron wire should be firm, and the film should have good light transmission flexibility, so as to achieve a better breeding effect.

No, because shrimp are cold-blooded animals, they will change with the change of water temperature, and they will hibernate in winter, so they will not freeze to death.

No, because shrimp can hibernate, and when it comes to the season of slow ocean, it will be relieved, and the vitality of shrimp is strong.

No, litopenaeus vannamei has adapted to the icy environment.

<> If there is a dead shrimp in Penaeus vannamei, you should observe the characteristics of the shrimp body surface, detect the quality of the water body, and analyze the causes of the death of the shrimp from many aspects.

Summary. Reasons:1

Physical factors, such as seedling causes, weak seedling constitution, poor immunity, weak tolerance to environmental changes, and malnutrition, are the fundamental causes of death. These factors lead to the occurrence of soft shells and unsuccessful molting of shrimp during environmental changes or molting, resulting in a large number of shrimp deaths. 2.

Hepatopancreatic lesions in the liver transfer stage, deterioration of aquaculture water quality and many other factors lead to hepatopancreatic poisoning, algal toxin poisoning, foodborne and drug-induced poisoning, etc., resulting in hepatopancreatic enlargement, yellowing, whitening and even transparent (necrosis) lesions, resulting in shrimp jejunum and empty stomach. 3.Environmental factors often occur during large changes in the environment or during the molting growth period.

Changes in the substrate of aquaculture water, algae, dissolved oxygen in water, and climate change are all causes of shrimp stealing death.

Reasons:1Physical factors, such as seedling causes, weak seedling constitution, poor immunity, weak tolerance to environmental changes, and malnutrition, are the fundamental causes of death.

These factors lead to the occurrence of soft shell and unsuccessful molting of shrimp when the environment changes or molts and grows well, resulting in a large number of shrimp death. 2.Hepatopancreatic lesions in the liver transfer stage, deterioration of aquaculture water quality and many other factors lead to hepatopancreatic poisoning, algal toxin poisoning, foodborne and drug-induced poisoning, etc., resulting in hepatopancreatic swelling, yellowing, whitening and even transparent (necrosis) lesions, Shendou causes shrimp jejunum and empty stomach.

3.Environmental factors: Stealing and blind lead death often occurs during the period of great changes in the environment or molting. Changes in the substrate of aquaculture water, algae, dissolved oxygen in water, and climate change are all causes of shrimp stealing death.

Method: 1Physique regulation program spilled:

Stilbene flavonoid" + "should hormone", and use it regularly 1-2 times before putting seedlings or dividing seedlings. Function: Improve the ability of shrimp to actively prevent premature grinding and reduce stress response.

2.Hepatopancreatic health care program Lu Yun Dou external or internal administration: "nabin" + "Tianqingsu" effect:

Prevent and treat redness and swelling of the hepatopancreas and remove toxins from the body. 3.Comprehensive prevention and control program spillage:

Jin Meikang" + "Pyrethoxanthin" + "Rootin" effect: increase the non-specific immune function of the shrimp body, inhibit and kill the virus in and out of the shrimp, and improve the resistance; Optimize the function of the hepatopancreas, reduce the damage of toxic and harmful substances to the hepatopancreas, promote shrimp feeding, and reduce the occurrence of diseases. 4.

Environmental control program: Materia Medica, Granular Pure Xianglian Solution (Whole Pool Sprinkling) Water Control: Stress Control of Homogenin + Polyhexin:

Steroids (used before stress) Litopenaeus vannamei shrimp stealing death syndrome is a frequent occurrence in recent years, and it is difficult to **. Only by preventing in advance and regulating and preventing from all aspects of breeding can we effectively reduce the occurrence of stealing deaths and ensure the success of breeding.

Do a good job of dredging, disinfection and hydroponics of ponds. Choose healthy virus-free shrimp ponds; In the process of feeding management, attention should be paid to the changes of water quality and various physical and chemical factors, and high-energy oxygen and nitrite degradation were used in the breeding process to maintain the relative stability of the water body.

Maintaining good water quality is the key, and the water index should be controlled within the normal range every day, the pH value is the best, the ammonia nitrogen should not be exceeded, and the nitrite should not be exceeded.

In the process of raising vannamei shrimp, a suitable site should be selected, and the water source of the pond should be monitored regularly, and the cultivation of excellent varieties can prevent diseases.