At the onset, the gill and abdominal muscles of shrimp, especially the fourth to sixth abdominal segments, become opaque and turbid, which can spread to the whole abdomen. The sick prawn was restless and thankless, and died at the bottom of the pool. Often accompanied by symptoms of yellow gill or black gill, some of them can be seen fasting or even death. Molting is the peak of death. If it is not controlled, this situation will continue until the shrimp harvest. You can imagine how much the loss is.
There are many reasons why prawn muscles are turbid, mainly including the following five reasons:
1. Long-term lack of trace elements in shrimp leads to malnutrition, weight loss and shell softening, which easily leads to white muscle cramps.
2. The water quality of shrimp culture is unstable, the water quality changes greatly, there are few algae, high transparency, strong light and high transparency of water body, which leads to the muscle turbidity of shrimp stress.
3. Hypoxia at the bottom of aquaculture water leads to shrimp being in a stress state such as sub-health for a long time, which leads to muscle turbidity.
4, sediment deterioration, a large number of pathogens at the bottom of the pool lead to shrimp pathogen infection, muscle disease leads to turbidity. The white turbidity that appears at this time needs to be distinguished from the white turbidity caused by other factors. White turbidity caused by pathogenic microorganisms is usually accompanied by complications such as broken whiskers, red legs and gill lesions.
Generally speaking, a few days after the white mud muscle of prawns occurs, cramps will occur due to physical weakness. Cramps can't shell normally, and in severe cases, prawns will die because of shell failure. If external pressure (such as adding water and sudden change of weather) causes stress and fails to shed the shell, it will also lead to red body, stealing death and even leaking the pool.
If prawns have white muscles, they must be handled quickly. Grasp the source of the disease and choose the right medicine. However, if prevention is greater than cure, what can be done to reduce the incidence of muscle turbidity in white shrimp?
1, supplement trace elements, and ensure sufficient energy source for prawns.
2. Change the bottom and transfer water to maintain a good water quality environment and provide a good external environment for shrimp production.
3. Strong physique, strong disease resistance and stress resistance. To enhance the disease resistance of prawns, the first task is to enhance the function of prawn liver and protect its health. Adding bile acid and Eucommia ulmoides leaf extract to shrimp feed can effectively protect the health of shrimp liver and intestine, improve the anti-stress ability, and effectively prevent shrimp muscle turbidity, enteritis, white feces and stealing death.