Black Tiger Prawn Welfare in Extensive Pond Systems

Black tiger prawns farmed in extensive and semi-intensive pond systems across Asia face welfare considerations around disease outbreaks, harvesting, and slaughter methods.

Key Facts

Penaeus monodon was historically the dominant farmed shrimp species before WSSV outbreaks shifted production
Extensive systems stock 2-5 prawns per square metre, providing more space than intensive alternatives
WSSV disease causes mass mortality events with significant welfare and economic consequences
Harvesting by pond draining concentrates prawns in declining water volumes causing acute crowding stress
Precautionary welfare consideration is warranted given uncertainty about prawn sentience

Welfare Considerations

Black tiger prawns in extensive pond systems face welfare challenges primarily at harvesting when pond draining concentrates animals in rapidly deteriorating water quality. Mass mortality disease events represent the most significant welfare incidents, killing prawns through viral infection with associated physiological distress. Slaughter by freezing or ice immersion may cause suffering if prawns can experience aversive states, as precautionary evidence suggests. The scale of production means small welfare improvements per animal would generate enormous aggregate benefit.

What You Can Do

Support development of better disease prevention reducing mass mortality welfare incidents
Choose prawn products from certified farms with transparency about production methods
Advocate for research into prawn sentience and evidence-based welfare standards
Support organisations developing humane slaughter alternatives for crustaceans at scale
Reduce unnecessary prawn consumption to lower pressure on intensive production systems