“…As explained in Coll et al (2012), quantitative information on the distribution of seabird species consisted of two different layers: one describing the foraging ranges during the breeding season, and a second during the non-breeding season. We created a buffer distance for each seabird foraging range using a combination of references and expert knowledge (www.birdlife.org;www.avibirds.com;Cramp andSimmons, 1977, 1983;Cramp, 1985;Monbailliu, 1986;Harrison, 1987;del Hoyo et al, 1992del Hoyo et al, , 1996Johnsgard, 1993;Handrinos and Akriotis, 1997;de and Brooke, 2004;Sterry, 2004;Nelson, 2005;Louzao et al, 2006;Yésou, 2006;Bourgeois and Vidal, 2008). For seabird species foraging only in pelagic waters, foraging ranges were drawn following available distribution maps from the literature.…”