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Title: Population-Scale Foraging Segregation in an Apex Predator of the North Atlantic
Authors: Paiva, Vitor H. 
Fagundes, Ana I.
Romão, Vera 
Gouveia, Cátia 
Ramos, Jaime A.
Issue Date: 2016
Publisher: Public Library of Science
Project: EU project LIFE09 NAT/PT/ 000041 
small grant from the British Ornithologists' Union (2011) 
SFRH/BPD/63825/2009 and SFRH/BPD/85024/2012 
Serial title, monograph or event: PLoS ONE
Volume: 11
Issue: 3
Abstract: In this work we investigated the between-colony spatial, behavioural and trophic segregation of two sub-populations of the elusive Macaronesian shearwaters Puffinus baroli breeding only ~340 km apart in Cima Islet (Porto Santo Island) and Selvagem Grande Island. Global location sensing (gls) loggers were used in combination with the trophic ecology of tracked individuals, inferred from the isotopic signatures of wing feathers. Results suggest that these two Macaronesian shearwater sub-populations do segregate during the non-breeding period in some 'sub-population-specific' regions, by responding to different oceanographic characteristics (habitat modelling). Within these disparate areas, both sub-populations behave differently (at-sea activity) and prey on disparate trophic niches (stable isotope analysis). One hypothesis would be that each sub-population have evolved and adapted to feed on particular and 'sub-population-specific' resources, and the segregation observed at the three different levels (spatial, behavioural and trophic) might be in fact a result of such adaptation, from the emergence of 'cultural foraging patterns'. Finally, when comparing to the results of former studies reporting on the spatial, behavioural and trophic choices of Macaronesian shearwater populations breeding on Azores and Canary Islands, we realized the high ecological plasticity of this species inhabiting and foraging over the North-East Atlantic Ocean.
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0151340
Rights: openAccess
Appears in Collections:I&D MARE - Artigos em Revistas Internacionais

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