Marine Animal Welfare

Marine Welfare: Invasive Species and Native Animal Welfare

Invasive marine species threaten native animal populations through predation, competition and disease, with significant welfare implications for affected native species.

Key Facts

Pacific oyster invasion of UK waters has altered native mussel and oyster bed ecology
Signal crayfish from North America devastate UK white-claw crayfish through competition and crayfish plague
Lionfish invasion in the Caribbean has severely impacted reef fish communities
American mink escaped from UK fur farms devastate water vole populations
Invasive species management including trapping raises welfare questions about methods and selectivity

Welfare Considerations

Invasive species cause welfare harm to native animals through direct predation (often causing injury and death in prey species), outcompeting for food causing starvation, and spreading disease. Management of invasive species to protect native welfare involves its own welfare trade-offs in the methods used. Humane trapping and rapid dispatch, combined with population control, represent the most welfare-balanced approach.

What You Can Do

Never release non-native animals into the wild
Support invasive species management programmes that use humane methods
Learn about invasive species threats in your region and report sightings
Donate to native species conservation programmes threatened by invasive competitors