title: Plastic debris in great skua (Stercorarius skua) pellets corresponds to seabird prey species.
abstract: Plastic is a common item in marine environments. Studies assessing seabird ingestion of plastics have focused on species that ingest plastics mistaken for prey items. Few studies have examined a scavenger and predatory species that are likely to ingest plastics indirectly through their prey items, such as the great skua (Stercorarius skua). We examined 1034 regurgitated pellets from a great skua colony in the Faroe Islands for plastics and found approximately 6% contained plastics. Pellets containing remains of Northern fulmars (Fulmarus glacialis) had the highest prevalence of plastic. Our findings support previous work showing that Northern fulmars have higher loads of plastics than other sympatric species. This study demonstrates that marine plastic debris is transferred from surface feeding seabird species to predatory great skuas. Examination of plastic ingestion in species that do not ingest plastics directly can provide insights into how plastic particles transfer vertically within the food web.
authors.affiliation: Institute of Biodiversity, Animal Health & Comparative Medicine, University of Glasgow, United Kingdom. Electronic address: sjurdur@hammer.fo.
authors.forename: S
authors.initials: S
authors.lastname: Hammer
authors.affiliation: Institute of Biodiversity, Animal Health & Comparative Medicine, University of Glasgow, United Kingdom.
authors.forename: R G
authors.initials: RG
authors.lastname: Nager
authors.affiliation: Institute of Biodiversity, Animal Health & Comparative Medicine, University of Glasgow, United Kingdom.
authors.forename: P C D
authors.initials: PCD
authors.lastname: Johnson
authors.affiliation: MacArthur Green, 95 South Woodside Road, Glasgow, United Kingdom.
authors.forename: R W
authors.initials: RW
authors.lastname: Furness
authors.affiliation: Department of Biology, Carleton University, Ottawa, Canada.
authors.forename: J F
authors.initials: JF
authors.lastname: Provencher
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology; D046091:Charadriiformes / Q000502:physiology*; D003718:Denmark; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D020387:Food Chain; D010969:Plastics / Q000032:analysis*; D011235:Predatory Behavior; D014866:Waste Products / Q000032:analysis*
chemical_list: D004785:Environmental Pollutants; D010969:Plastics; D014866:Waste Products
keywords: Debris monitoring; Faroe Islands; Great skua; Northern fulmar; Plastic; Trophic transfer