Rainbow trout slaughter methods have significant welfare implications. Evidence-based stunning protocols reduce suffering at the end of life.
Trout killed by asphyxiation in air or ice may take minutes to lose consciousness, during which they experience distress. Effective percussive or electrical stunning produces immediate insensibility. The welfare case for requiring pre-slaughter stunning for trout is strong and supported by fish welfare science. Consumer choice for certified products creates commercial incentives for welfare improvement.