Wildlife

Cormorant Welfare and Fishing Conflicts

Cormorants face persecution in many countries where they compete with anglers and fish farmers. Evidence-based, non-lethal management reduces conflict without unnecessary killing.

Key Facts

Cormorants are highly effective fish predators that form large colonial roosts
Their populations recovered after DDT-era persecution, prompting conflict with aquaculture and anglers
Scaring, hazing, and nest disturbance are non-lethal management options of variable effectiveness
Lethal control programs have generally failed to achieve sustained population reduction
Some fish farms use physical exclusion netting as an effective, non-lethal solution

Welfare Considerations

Cormorants create genuine economic conflicts with aquaculture operations, but lethal control programs consistently fail to produce lasting population reduction due to immigration from surrounding areas. Non-lethal methods including physical exclusion with nets, acoustic deterrents, and laser hazing are more effective at protecting specific sites. Culling causes significant welfare harm and ecological disruption without solving the underlying conflict.

What You Can Do

Support non-lethal cormorant management approaches in aquaculture and fishing contexts
Oppose culling programs where evidence shows they are ineffective and alternatives exist
Advocate for support for fish farmers to install physical exclusion netting
Report illegal persecution of cormorants to wildlife authorities
Support evidence-based wildlife conflict resolution over reflexive lethal control