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dc.contributor.authorSherley, Richard B.
dc.contributor.authorLadd-Jones, Hannah
dc.contributor.authorGarthe, Stefan
dc.contributor.authorStevenson, Olivia
dc.contributor.authorVotier, Stephen C.
dc.identifier.citationSherley , R B , Ladd-Jones , H , Garthe , S , Stevenson , O & Votier , S C 2019 , ' Scavenger communities and fisheries waste : North Sea discards support 3 million seabirds, 2 million fewer than in 1990 ' , Fish and Fisheries , vol. Early View .
dc.identifier.otherPURE: 263482726
dc.identifier.otherPURE UUID: 9d1764f2-7f6a-4206-a519-3ebfe91e1fcd
dc.identifier.otherWOS: 000495106800001
dc.identifier.otherScopus: 85074824232
dc.identifier.otherORCID: /0000-0002-0231-0585/work/92775771
dc.description.abstractEvery year fisheries discard >10 million tonnes of fish. This provides a bounty for scavengers, yet the ecological impact of discarding is understudied. Seabirds are the best-studied discard scavengers and fisheries have shaped their movement ecology, demography and community structure. However, we know little about the number of scavenging seabirds that discards support, how this varies over time or might change as stocks and policy change. Here, we use a Bayesian bioenergetics model to estimate the number of scavenging birds potentially supported by discards in the North Sea (one of the highest discard-producing regions) in 1990, around the peak of production, and again after discard declines in 2010. We estimate that North Sea discards declined by 48% from 509,840 tonnes in 1990 to 267,549 tonnes in 2010. This waste had the potential to support 5.66 (95% credible intervals: 3.33-9.74) million seabirds in the 1990s, declining by 39% to 3.45 (1.98-5.78) million birds by 2010. Our study reveals the potential for fishery discards to support very large scavenging seabird communities but also shows how this has declined over recent decades. Discard bans, like the European Union's Landing Obligation, may reduce inflated scavenger communities, but come against a backdrop of gradual declines potentially buffering deleterious impacts. More work is required to reduce uncertainty and to generate global estimates, but our study highlights the magnitude of scavenger communities potentially supported by discards and thus the importance of understanding the wider ecological consequences of dumping fisheries waste.
dc.relation.ispartofFish and Fisheriesen
dc.rightsCopyright © 2018 The Authors. Fish and Fisheries Published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.subjectFood requirementsen
dc.subjectGC Oceanographyen
dc.subjectQH301 Biologyen
dc.titleScavenger communities and fisheries waste : North Sea discards support 3 million seabirds, 2 million fewer than in 1990en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Coastal Resources Management Groupen
dc.description.statusPeer revieweden

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