Spatial distribution of seabird biomass removal and overlap with fisheries in a large marine ecosystem

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dc.contributor.authorJessopp, Mark J.en
dc.contributor.authorTierney, Daviden
dc.contributor.authorBennison, Ashleyen
dc.contributor.authorGeelhoed, Steve C. V.en
dc.contributor.authorCaƱadas, Anaen
dc.contributor.authorRogan, Emeren
dc.contributor.authorGiralt Paradell, Oriolen
dc.contributor.funderDepartment of Environment, Climate and Communicationsen
dc.contributor.funderDepartment of Housing, Local Government and Heritageen
dc.contributor.funderSustainable Energy Authority of Irelanden
dc.date.accessioned2025-04-24T15:49:48Z
dc.date.available2025-04-24T15:49:48Z
dc.date.issued2025en
dc.description.abstractGlobally, seabirds remove a prey biomass equivalent to commercial fishery landings, suggesting likely competition for resources that will vary spatially and seasonally. Using extensive aerial surveys combined with species-specific energetic requirements, we calculated and mapped at-sea removal of prey biomass by seabirds during the breeding and non-breeding seasons and compared this to the seasonal distribution of fishing effort. The distribution of prey biomass removal by seabirds was concentrated in coastal areas, with up to 6.39 kg/km2/day of biomass consumed in the breeding season and up to 4.3 kg/km2/day in the non-breeding season. Offshore, average biomass consumption ranged from 0.28-1.53 to 0.75-1.84 kg/km2/day in the breeding and non-breeding seasons, respectively. Total prey biomass removal by seabirds across the study area (the Irish Exclusive Economic Zone covering an area of 341 183 km2) was estimated at around 441.2 tonnes/day in the breeding season and 478 tonnes/day in the non-breeding season, highlighting the significant role that seabirds play in marine ecosystems. The fine-scale spatial distribution of prey biomass removal by seabirds was significantly correlated with the distribution of fishing effort in both inshore and offshore areas, highlighting potential competition for resources and/or attraction of seabirds to vessels for discards. en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleidfsaf045en
dc.identifier.citationJessopp, M. J., Tierney, D., Bennison, A., Geelhoed, S. C., CaƱadas, A., Rogan, E. and Giralt Paradell, O. (2025) 'Spatial distribution of seabird biomass removal and overlap with fisheries in a large marine ecosystem', ICES Journal of Marine Science, 82(4). DOI: 10.1093/icesjms/fsaf045en
dc.identifier.doi10.1093/icesjms/fsaf045en
dc.identifier.issn10543139en
dc.identifier.issued4
dc.identifier.journaltitleICES Journal of Marine Scienceen
dc.identifier.urihttps://hdl.handle.net/10468/17314
dc.identifier.volume82
dc.language.isoenen
dc.publisherOxford University Pressen
dc.rightsĀ© 2025, the Author(s). . Published by Oxford University Press on behalf of International Council for the Exploration of the Sea. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly citeden
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAerial surveyen
dc.subjectCompetitionen
dc.subjectNorth Atlanticen
dc.subjectObSERVEen
dc.subjectPrey consumptionen
dc.titleSpatial distribution of seabird biomass removal and overlap with fisheries in a large marine ecosystemen
dc.typeArticle (peer reviewed)en
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