Oystercatchers depend on shellfish beds that are regulated by fisheries managers, creating direct conflicts between their food supply and commercial shellfish harvesting.
Oystercatchers denied access to their established feeding areas by shellfish bed removal or access restriction face nutritional stress during winter when prey is critical. Habituation to specific feeding techniques means birds displaced from mussel beds cannot easily switch to alternative prey. Adult birds in poor nutritional condition from reduced shellfish access produce fewer, lower-quality eggs. Illegally poisoned or disturbed birds experience acute and chronic welfare harms from human management activities.