Aquaculture

Farmed Salmon Hatchery Stress and Welfare

Hatchery conditions during the first weeks of salmon life have lasting effects on welfare, with early stress causing epigenetic changes that affect lifetime health.

Key Facts

Salmon eggs and alevins are sensitive to light, temperature, and handling stress
Excessive crowding in hatchery tanks causes competition and fin damage in juvenile fish
Cortisol stress responses in early life alter stress axis programming for lifetime
Water quality management in hatcheries is critical for optimal development
Best practice hatcheries use minimal density, optimal temperature, and minimal handling

Welfare Considerations

Early life stress in salmon hatcheries has effects that extend throughout the production cycle through epigenetic programming. Poor hatchery welfare is not just a problem at the time - it compromises lifetime stress responses, disease resistance, and welfare. Investment in hatchery conditions is therefore an investment in lifetime salmon welfare.

What You Can Do

Support aquaculture certifications including hatchery welfare standards
Choose salmon from certified farms with transparent hatchery management protocols
Advocate for hatchery welfare as a mandatory component of aquaculture welfare schemes