Fulmars are considered the best indicators of North Sea plastic pollution because they readily ingest floating debris mistaken for prey.
Stomach plastic reduces capacity for food causing chronic malnutrition and growth delays in chicks. Sharp plastic fragments can puncture the stomach wall causing peritonitis. Plastic toxins bioaccumulate causing endocrine disruption. Fulmar chicks fed plastic by parents starve while appearing to have full stomachs. Monitoring programmes show little improvement in plastic contamination rates over decades.