Rainbow trout face significant disease challenges in intensive aquaculture - welfare-conscious disease management combines prevention, early detection and humane treatment.
Trout disease welfare management demonstrates the alignment between welfare and production quality: stressed, diseased fish have poor welfare and poor flesh quality. Prevention-focused approaches including vaccination, appropriate stocking density, water quality management and reduced handling stress address the root causes of disease susceptibility. The dramatic reduction in antibiotic usage in Norwegian salmon farming through vaccination provides a model for trout farming. Welfare-aware disease management monitors fish behaviour continuously for early detection - loss of schooling, surface gulping and feed refusal are validated early disease indicators that enable rapid intervention.