Most seafood lovers have heard of body cramp syndrome in shrimp, but what is it really? Body cramp syndrome is a condition that affects shrimp and other crustaceans.
It is caused by a build-up of lactic acid in the muscles, which leads to cramping and pain. The condition is not life-threatening, but it can be extremely painful for shrimp and threatening for culture unit.
Cramped Tail Syndrome (CTS) is a shrimp pathology that has been reported in different geographical areas around the world.
The disease is caused by a variety of stress factors, including high stocking densities, poor water quality, and low oxygen levels.
Causes of Bent\Cramped Tail or Body Cramp
The cramped tail syndrome of shrimp is a debilitating and often fatal disease that is caused by various environmental and nutritional factors.
The disease, called cramped muscle disease, causes the shrimp to curl up into a ball and their tails to bend. The shrimp are also unable to swim properly.
This disease is caused by the handling of shrimp in warm, humid air that is much warmer than the culture water. The warm air causes the shrimp to overheat and results in the cramping of their muscles.
This disease has been linked to mineral imbalances in the shrimp, specifically magnesium and calcium.
CTS is most commonly found in shrimp that are kept in crowded conditions, such as in hatcheries or shrimp farms. The disease can also occur in wild populations, but is less common there.
Sign & Symptoms of Shrimp Body Cramp
The symptoms of cramped muscle disease in shrimp are varied, but the most common symptom is partial or complete rigid flexure of the tail.
This symptom is caused by the contraction of the muscles in the tail, which results in the shrimp being unable to move its tail.
The main symptoms of CTS are a severely crumpled and shortened tail, which can impede the shrimp’s movement and feeding ability.
When shrimp get a disease called cramped muscle disease, their symptoms vary depending on how advanced the disease is.
If the shrimp are only partially cramped, they’ll swim with a humped abdomen. But if they’re fully cramped, they’ll lie on their sides at the bottom of the pond or tank.
Cannibalism is common among healthy shrimp, and they’ll often eat weaker shrimp that are suffering from diseases like cramped muscle disease. So if you see some of your shrimp acting strangely, it’s important to check them for signs of the disease.
Early signs of cramped muscle disease include lethargy, loss of appetite, and cloudy eyes. The shrimp may also have difficulty moving their tails.
If you see any of these signs in your shrimp, it’s important to isolate them from the rest of the population and treat them immediately.
Prevention & Treatment
Cramped muscle disease is a serious threat to shrimp populations, as it can cause mass mortality events. The best way to prevent this disease is to maintain clean and healthy environments for shrimp.
The disease can also lead to death due to starvation or infection. Proper husbandry and nutrition can help prevent the disease from occurring.
References
- Lightner, D. V. (2021). Noninfectious Diseases of Crustacea With an Emphasis on Cultured Penaeid Shrimp. In Pathobiology of Marine and Estuarine Organisms (pp. 343-358). CRC Press.
- Baticados, M. C. L., Cruz-Lacierda, E. R., de la Cruz, M., Duremdez-Fernandez, R. C., Gacutan, R. Q., Lavilla-Pitogo, C. R., & Lio-po, G. D. (1990). Diseases of penaeid shrimps in the Philippines. Aquaculture Department, Southeast Asian Fisheries Development Center.
- Erazo-Pagador, G. E. (2001). Environmental and other non-infectious diseases. In Health Management in Aquaculture (pp. 75-81). Aquaculture Department, Southeast Asian Fisheries Development Center.
- Lightner, D. V. (1992). Crustacea With an Emphasis on Cultured Penaeid Shrimp. Pathobiology of Marine and Estuarine Organisms, 2, 343.
- Ramu, D., Sigamani, S., Venkatachalam, H., Bommannan, P., & Ramamurthy, D. (2017). The role of probiotics in the control of bacterial diseases and biodegradation of organic matter in shrimp (Penaeus vannamei) culture ponds of South India. Journal of Coastal Life Medicine, 5(7), 293-298.
- Lipton, A. P. (1995). Shrimp diseases and control.
- Lightner, D. V. (1993). Diseases of cultured penaeid shrimp. CRC handbook of mariculture,, 1, 393-486.
- Gunalan, B., Soundarapandian, P., Anand, T., Kotiya, A. S., & Simon, N. T. (2014). Disease occurrence in Litopenaeus vannamei shrimp culture systems in different geographical regions of India. International Journal of Aquaculture, 4.
- Thitamadee, S., Prachumwat, A., Srisala, J., Jaroenlak, P., Salachan, P. V., Sritunyalucksana, K., & Itsathitphaisarn, O. (2016). Review of current disease threats for cultivated penaeid shrimp in Asia. Aquaculture, 452, 69-87.
- Main, K. L., & Laramore, R. (1999). Shrimp health management. Farming marine shrimp in recirculating freshwater systems, 163-177.
- HOSSAIN, M. J., AHMED, G. U., RASHID, M. M., AKHTAR, S., & RAHMAN, M. M. (2021). Effect of aqua-drugs and chemicals on shrimp health and production in Khulna, Bangladesh. Bangladesh Journal of Fisheries, 33(1), 89-97.
- Stewart, J. E. (1979). Disease Diagnosis and Control in North American Marine Aquaculture. Developments in Aquaculture and Fisheries Science, 6. Journal of the Fisheries Board of Canada, 36(1), 108-108.
- Flegel, T. W. (2009). Current status of viral diseases in Asian shrimp aquaculture.
Fulks, W. (1992). Diseases of Cultured Penaeid Shrimp. - Johnson, S. K. (1995). Handbook of shrimp diseases.
- Lundin, C. G. (1996). Global attempts to address shrimp disease.
- El-Saadony, M. T., Swelum, A. A., Ghanima, M. M. A., Shukry, M., Omar, A. A., Taha, A. E., & Abd El-Hack, M. E. (2022). Shrimp production, the most important diseases that threaten it, and the role of probiotics in confronting these diseases: A review. Research in Veterinary Science.
- Loy, D. S. (2014). Host-virus interactions in the Pacific white shrimp, Litopenaeus vannamei (Doctoral dissertation, Iowa State University).
- AftabUddin, S., Siddique, M. A. M., Habib, A., Akter, S., Hossen, S., Tanchangya, P., & Abdullah Al, M. (2021). Effects of seaweeds extract on growth, survival, antibacterial activities, and immune responses of Penaeus monodon against Vibrio parahaemolyticus. Italian Journal of Animal Science, 20(1), 243-255.
- Li, E., Wang, X., Chen, K., Xu, C., Qin, J. G., & Chen, L. (2017). Physiological change and nutritional requirement of Pacific white shrimp Litopenaeus vannamei at low salinity. Reviews in Aquaculture, 9(1), 57-75.
