Farmed Salmon Pre-Slaughter Welfare Indicators

Assessing salmon welfare in the hours before slaughter requires species-specific indicators; crowding, handling, and water quality all affect the pre-slaughter experience.

Key Facts

Pre-slaughter crowding for collection causes acute stress evidenced by elevated cortisol in salmon
Air exposure during crowding and transfer causes respiratory distress and is inherently stressful
Water temperature and oxygen levels during pre-slaughter holding are critical welfare parameters
Welfare indicators developed for mammals are not directly applicable to fish - species-specific tools are needed
The Aquaculture Stewardship Council is developing fish welfare standards including pre-slaughter criteria

Welfare Considerations

The pre-slaughter period concentrates multiple welfare stressors in a short period - crowding, netting, air exposure, and transport. For salmon that may be sentient, this represents a welfare crisis in the final hours of life. Minimizing handling time, maintaining water quality during collection, and ensuring rapid effective stunning are all welfare-positive interventions that slaughter plants can implement.

What You Can Do

Choose salmon from ASC-certified farms where pre-slaughter welfare standards are emerging
Support the development of fish welfare standards that include pre-slaughter handling criteria
Advocate for aquaculture welfare research funding specifically targeting pre-slaughter fish welfare
Reduce salmon consumption or shift to plant-based omega-3 alternatives