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dc.contributor.authorReal Garcia, Enrices_ES
dc.contributor.authorOro, Danieles_ES
dc.contributor.authorMartínez-Abraín, Alejandroes_ES
dc.contributor.authorIgual, José Manueles_ES
dc.contributor.authorBertolero, Albertes_ES
dc.contributor.authorBosch, M.es_ES
dc.contributor.authorTavecchia, Giacomoes_ES
dc.identifier.citationJournal of Avian Biology 48(11): 1462-1470 (2017)es_ES
dc.description.abstractRecent European policies on the ban of fishing discards and the closure of open-air landfills are expected to reduce predictable and abundant food resources for generalist seabirds. In order to forecast the consequences of this reduction on seabird breeding investment it is important to understand whether diverse anthropogenic foraging resources act synergistically or not and whether their influence is mediated by density-dependent mechanisms. To assess these effects at large spatio-temporal scale, we measured mean egg volume as a proxy of breeding investment in ca. 5,000 three-egg clutches of the Yellow-legged Gull (Larus michahellis) from 20 colonies of the Western Mediterranean, located both along European and African coasts. In European gull colonies, egg volume increased with the availability of fishing discards and landfills in the vicinity of the colony. However, the landfill effect was weaker than the effect of fishing discards, probably due to the lower quality of waste as food for gulls. In contrast, none of the anthropogenic food subsidies influenced egg volume in African colonies, likely due to socio-economic differences (i.e. a much lower availability and predictability of both discards and waste food. Finally, results showed that the positive association between fishing discards and open-air landfills on egg volume was mediated by negative density-dependent mechanisms probably related to an increase in competition for food.es_ES
dc.description.sponsorshipFunds were partially supplied by the Spanish Ministry of Economy and co-financiated by the European Social Fund (grant ref: CGL2013-42203-R) and by Generalitat Valenciana. This research has received funding from the European Commission’s Horizon 2020 Research and Innovation Programme under Grant Agreement Nº. 634495 for the project Science, Technology, and Society Initiative to minimize Unwanted Catches in European Fisheries (MINOUW). A. Martínez-Abraín was supported by an Isidro Parga Pondal contract from Xunta de Galicia. Funding was also provided by Universidade da Coruña and Xunta de Galicia (reference GRC2014/050).es_ES
dc.publisherJohn Wiley & Sonses_ES
dc.titlePredictable anthropogenic food subsidies, density-dependence and socio-economic factors influence breeding investment in a generalist seabirdes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)es_ES
dc.contributor.funderEuropean Commissiones_ES
dc.contributor.funderXunta de Galiciaes_ES
dc.contributor.funderGeneralitat Valencianaes_ES
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