Aquaculture

Farmed Tilapia Genetic Diversity Welfare

Genetic diversity in farmed tilapia populations affects disease resistance, environmental adaptability, and welfare resilience across production systems.

Key Facts

Commercial tilapia are dominated by a few strains with reduced genetic diversity
Inbreeding depression manifests as reduced growth, immunity, and reproductive performance
The WorldFish GIFT strain has improved many production welfare metrics through selective breeding
Genetic diversity maintenance programmes preserve adaptive potential for changing conditions
Disease resistance traits including against Streptococcus are actively selected in some programmes

Welfare Considerations

Genetic diversity is a welfare resource - diverse populations have greater resilience to disease challenges and environmental stressors. Inbred tilapia with low diversity are more susceptible to disease outbreaks that cause mass suffering. Breeding programme investment in both production and welfare traits benefits both fish and producers.

What You Can Do

Support aquaculture organisations investing in welfare-inclusive breeding programmes
Advocate for genetic diversity requirements in aquaculture sustainability certification
Choose tilapia from farms using improved, welfare-screened genetic lines