Aquaculture Welfare

Farmed Salmon Pre-harvest Crowding Welfare

The crowding of salmon before harvest is a significant welfare challenge causing fear, injury, and physiological stress in millions of fish.

Key Facts

Pre-harvest crowding is used to concentrate fish for efficient transfer to slaughter boats
Crowding causes hypoxia, fin damage, scale loss, and elevated cortisol in salmon
Welfare indicators deteriorate rapidly during crowding operations lasting more than 30 minutes
Pump speeds, monitoring, and crowding duration limits reduce welfare compromise
Pre-harvest welfare protocols are increasingly required by welfare-focused buyers

Welfare Considerations

Pre-harvest crowding represents a critical welfare intervention point where millions of salmon experience acute distress. Developing and enforcing duration limits, monitoring standards, and rapid transfer protocols would significantly reduce this suffering.

What You Can Do

Support salmon welfare certification schemes requiring pre-harvest monitoring
Advocate for maximum crowding duration standards in aquaculture welfare legislation
Purchase salmon from producers with transparent pre-harvest welfare practices