“…Under the principle of competitive exclusion, spatial and temporal resource partitioning is a key mechanism to reduce competitive pressure for shared resources in sympatric species (Schoener, 1974). For colonial breeding seabirds that function as central place foragers when breeding, competition for resources near colonies may influence habitat use, prey selection, energetic expenditure, and ultimately population sizes (Furness and Birkhead, 1984;Lewis et al, 2001;Wakefield et al, 2013;Oppel et al, 2015;Jessopp et al, 2020;Weber et al, 2021). Habitat segregation in seabirds is well documented and occurs not just between sympatrically breeding species (Kappes et al, 2010;Young et al, 2010Young et al, , 2015Linnebjerg et al, 2013;Robertson et al, 2014;Barger et al, 2016), but also between age classes (Pettex et al, 2019), sexes (Lewis et al, 2002;Phillips R.A. et al, 2004;Camphuysen et al, 2015), and nearby populations of the same species (Rayner et al, 2011;Wiley et al, 2012;Ceia et al, 2015;Shaffer et al, 2017;Bolton et al, 2019).…”