Early Mortality Syndrome (EMS) or Hepatopancreatic Acute Necrosis Syndrome is a fairly new disease that affects shrimp.

Symptoms:

• In the early stages of disease shrimp start showing gross signs,such as the antennae cut and Uropods turned normal to red in color.
• Later on Hepatopancreas turns reddish yellow and finally entire body turns dark red in color.
• Continuous internal mortality may notice throughout the day.
• The dead shrimps are settled at the bottom of the tank and will not come to sides or surface.Farmers will come to know about this only when dead and cannibalized shrimp come to check tray.
• The occurrence of mortality is directly proportional to stocking density. Higher the stocking density early the mortality sets in.
• Mortality rate is relatively more in low saline ponds.
• White or yellow fecal matter is noticed in the gut.
• Mortality noticed only during inter-moult stage.
• Very poor survival and high feed conversion ratios at the time of harvest.

Management/Controlling:

• Regularly remove the dead shrimp from the pond.
• Reduce the stocking density by partial harvesting reduced the mortality.
• Reduced feed quantity or suspending feed for few days reduce the mortality.
• (Some farmers opted for extensive culture and were able to reach the production up to 30 count without RMS).
• The culture practices like stocking bigger post larvae,reducing stocking density, nursery management, partial harvest ,strict feed management and Polyculture will reduce the incidence of RMS.

We will recommend to use Aquapro for best solution for this Issue.