Aquaculture and Fish Welfare

Farmed Salmon Welfare: Deformity Prevention and Monitoring

Spinal and jaw deformities in farmed salmon cause chronic welfare problems. Prevention through improved hatchery conditions and nutrition reduces deformity rates significantly.

Key Facts

Vertebral compression deformities affect up to 20% of farmed salmon in some operations
Deformities cause chronic pain and reduce fish ability to compete for food and avoid conspecific aggression
Inadequate vitamin C, temperature shock during hatching and high stocking density increase deformity risk
Digital image analysis systems now enable automated deformity monitoring at scale
Selective breeding for skeletal integrity is reducing deformity rates in leading genetics companies

Welfare Considerations

Spinal deformities represent chronic, significant welfare compromise for affected salmon. Prevention through improved hatchery management and nutrition is both a welfare and commercial priority.

What You Can Do

Support aquaculture certification schemes that specify deformity monitoring standards
Advocate for transparency in deformity prevalence data as a salmon welfare indicator
Choose certified salmon from operations with documented deformity prevention programmes