What Is Necrobiosis?

Muscle necrosis, shrimp disease caused by excessively high water temperature, excessively high or low salinity, insufficient dissolved oxygen in water, or containing toxic chemicals. All kinds of prawns can suffer. Abdominal or whole body muscles of sick shrimp turn white and opaque.

Muscle necrosis

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Muscle necrosis, shrimp disease caused by excessively high water temperature, excessively high or low salinity, insufficient dissolved oxygen in water, or containing toxic chemicals. All kinds of prawns can suffer. Abdominal or whole body muscles of sick shrimp turn white and opaque.
Muscle necrosis is mainly caused by, for example, abnormal water temperature and salinity, insufficient dissolved oxygen for a long time, excessive stocking density, or water pollution, etc., which may be symptoms after stress response.
Chinese name
Muscle necrosis
Foreign name
muscle necrosis
Pathogen
Caused by inappropriate environmental factors
Also known as
Spontaneous muscle necrosis
Muscle necrosis. The abdominal muscles of prawns, especially the fourth to sixth abdominal muscles, become cloudy and opaque. The severely diseased shrimp necrosis area quickly expanded to the entire abdomen, and some shrimps were accompanied by vigorous activities, swimming uneasily or jumping out of the water. After 10 to 30 minutes, the swimming slowed down until they were still, such as the duration Long, can cause death.
From the external symptoms and analysis of the diseased shrimp, the relevant pathogenic factors can be detected, and a diagnosis can generally be made. However, parasitic microsporidiosis and vibriopathies may also cause muscles to turn white and opaque. Therefore, for the diagnosis of muscle necrosis, parasitic and bacteriological examinations should be performed to avoid misdiagnosis.
This disease occurs frequently in coastal shrimp farming areas in China, and the incidence is usually low, generally around 5%. The epidemic season is a high temperature period from July to September each year. The disease may be affected by shrimp.
Keep high water level in shrimp ponds in summer and autumn and high temperature seasons to prevent fresh water from entering the ponds after heavy rains and reduce salinity. Prevent water source pollution, maintain good water quality and sufficient dissolved oxygen, and do not overstock the density. Feed high-quality compound feed, do not pull the nets during high-temperature fishing, and do not disturb pond shrimp. After finding the condition, analyze, judge and find out the cause, and take corresponding measures. Eliminate pathogenic factors, raise water level, improve environmental conditions, sick shrimp with less symptoms and shorter disease duration, can return to normal within 4 to 6 hours. [1-2]

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