Aquatic Animals

Stocking Density in Shrimp Aquaculture

High stocking densities in shrimp farms cause chronic stress, disease outbreaks, and reduced welfare.

Key Facts

Global shrimp aquaculture produces over 5 million tonnes annually
Stocking densities in intensive systems can exceed 150 shrimp per square metre
High density is strongly correlated with disease susceptibility and mortality
Acute hepatopancreatic necrosis disease (AHPND) thrives in overcrowded conditions
Low-density systems show higher survival rates and better growth performance

Welfare Considerations

Evidence suggests shrimp have nociceptors and exhibit avoidance learning, raising genuine welfare concerns. In overcrowded ponds, chronic physiological stress degrades immune function, leading to cascading disease, chemical treatments, and mass mortality events. Reducing stocking densities improves both welfare and farm economics — a rare case of commercial and ethical alignment.

What You Can Do

Choose shrimp certified by welfare-conscious standards where available
Support the Shrimp Welfare Project's research and advocacy
Ask seafood suppliers about stocking density practices
Advocate for welfare standards in international shrimp trade agreements
Reduce consumption of intensively farmed shrimp