Description: shrimp disease causes massive losses in farming communities. Here are four serious diseases and how to reduce their risks.
Farming shrimps holds great business potentials due to high demands, but shrimp disease is a serious problem. Several diseases, especially the ones caused by viruses, are becoming threats among Asian farmers. Here are several diseases and their characteristics to spot.
Short for acute hepatopancreatic necrosis syndrome, AHPNS is an emerging shrimp disease in Asia. This disease is caused by virus-infected Vibrio parahaemolyticus bacteria. The result is the digestive system and tissue damages. While it does not affect humans (who eat the shrimps), it has caused massive shrimp deaths and farming losses in China and Vietnam.
Yellow-head disease (YHD) is caused by Rhabdoviridae virus and often attacks giant black tiger shrimps, which are commonly farmed in Asia. Symptoms include swollen and yellowish heads, pale bodies, and massive deaths around three to five days after infection.
3. Myonecrosis Viral Infection
Myonecrosis viral infection is caused by Totiviridae viruses, common in Brazil and Indonesia. The infection causes discoloration and white stains along the tail and abdomen. This disease often happens after sudden changes in water temperature or feeding type. The result is a massive death among adult or juvenile shrimps. This viral infection can spread by regurgitated shrimp waste from birds.
How to Prevent Shrimp Diseases
Despite their effects on shrimp farming, shrimp diseases still receive small attention. There have been no exact cures for shrimp diseases, especially after massive deaths. Newer contagion such as AHPNS still has not resulted in vaccines. However, farmers can conduct preventive methods to reduce risks.
Increasing biosecurity and reducing stress among shrimps are important to keep them healthy. Make sure to have proper filtration and sewage management systems. Disinfect larvae and eggs before cultivating them to reduce disease risks. Make sure the feeds contain important nutrients, such as vitamin C and E, fatty acids, and immunostimulants.
Shrimp disease causes massive losses once it happens. While there is no exact cure, farmers still have various preventive measure options to keep their shrimps healthy.