Wild Otter and Fish Farm Conflict

Eurasian otters and fish farms come into conflict across the UK, raising challenges around protecting both a recovering native species and aquaculture enterprises.

Key Facts

Eurasian otters recovered significantly after legal protection and improved river water quality
Otters are highly effective fish hunters and can cause significant stock losses at fish farms
Trout farms are particularly vulnerable, as stocked fish are dense and easily accessible
Licensed lethal control of otters is rarely granted and requires demonstration of non-lethal measure failure
Non-lethal deterrents include electric fencing, physical barriers, and sensor-triggered systems
Otter predation at farms is estimated to cause millions of pounds of losses annually in the UK

Welfare Considerations

The conflict between otters and fish farms involves welfare considerations on multiple sides. Individual otters displaced from established territories by deterrents experience the stress of forced range shifts. Otters killed illegally suffer acutely. Farmed fish exposed to otter predation events experience acute stress, injury from attacks, and disruption of normal behaviour from repeated disturbance. Resolution of the conflict through effective non-lethal deterrence protects otter welfare while also reducing stress in farmed fish from predation events.

What You Can Do

Support otter conservation organisations that advocate for non-lethal conflict resolution
If you manage a fish farm, invest in effective otter-proof fencing as a first response to depredation
Never illegally kill or trap otters; report illegal persecution to the relevant authorities
Advocate for government support funding to help fish farms install effective otter deterrents
Support research into cost-effective non-lethal deterrent systems for otter-fish farm conflict