Trout are among the most commonly farmed freshwater fish globally. Their welfare in aquaculture depends on stocking density, water quality, and slaughter methods.
Farmed trout welfare is determined primarily by stocking density, water quality, and health management. Overcrowding causes chronic stress, increased aggression, fin damage, and disease susceptibility. Cataracts and spinal deformities — indicators of husbandry failures — affect welfare through impaired vision and movement. Pre-slaughter stunning is the most impactful welfare intervention available at end of life and is increasingly standard in higher-welfare certified operations.