Farmed Shrimp Disease and Welfare: White Spot and Beyond

Viral and bacterial diseases in shrimp aquaculture cause mass mortality events and significant welfare harm, challenging producers and prompting biosecurity improvements.

Key Facts

White Spot Syndrome Virus (WSSV) has caused billions of dollars in losses and remains the most devastating shrimp disease globally
Early Mortality Syndrome (EMS) devastated Southeast Asian shrimp production causing mass larval die-offs from bacterial Vibrio infection
Disease outbreaks in crowded intensive ponds create conditions of mass suffering before death from pathogen-induced hemorrhage and organ failure
Prophylactic antibiotic use to prevent shrimp disease contributes to antimicrobial resistance with human health implications
Probiotics, biosecure Specific Pathogen Free (SPF) broodstock, and improved pond management reduce disease risk with welfare benefits

Welfare Considerations

Disease in farmed shrimp causes mass welfare events involving millions of animals suffering from viral hemorrhagic disease, bacterial septicemia, and physiological collapse. The severity of suffering in disease outbreaks is poorly characterized due to uncertainty about shrimp sentience, but the precautionary principle and growing evidence of nociception suggest that mass disease mortality involves significant welfare harm at scale. Preventive approaches including biosecure SPF stock, improved water quality, and reduced crowding improve welfare by preventing disease rather than managing it after onset.

What You Can Do

Choose shrimp certified under standards requiring biosecurity practices reducing disease risk
Support research into shrimp disease prevention and its welfare benefits alongside production benefits
Advocate for restrictions on prophylactic antibiotic use in shrimp aquaculture in your region
Reduce shrimp consumption or choose certified alternatives from producers with documented disease management welfare standards