Aquaculture

Farmed Rainbow Trout Slaughter Welfare

Slaughter methods for rainbow trout vary widely in humaneness, with percussive stunning and electrical methods offering more humane alternatives.

Key Facts

Rainbow trout are slaughtered by several methods including asphyxiation, CO2, and percussion
Asphyxiation in air or ice can take over 10 minutes, during which fish are conscious
Percussive stunning and spiking causes immediate loss of consciousness if performed correctly
Electrical stunning before killing requires careful voltage calibration for reliability
UK law requires fish to be stunned before killing in slaughterhouses

Welfare Considerations

Trout killed by asphyxiation or CO2 experience prolonged distress and apparent pain. More humane electrical or percussive methods are technically accessible and should become industry standard.

What You Can Do

Choose trout from certified farms using humane slaughter methods
Support industry standards requiring pre-slaughter stunning in all fish species
Advocate for mandatory humane slaughter in aquaculture regulations globally