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Título:
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Foraging movements and habitat niche of two closely related seabirds breeding in sympatry
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Autor/a:
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Afán Asencio, Isabel; Navarro, Joan; Cardador Bergua, Laura; Ramírez, Francisco; Kato, Akiko; Rodríguez, Beneharo; Ropert‑Coudert, Yan; Forero, Manuela G.
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Notas:
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As central-place foragers, pelagic seabirds are constrained by spatiotemporal heterogeneity to find productive marine areas and compete for prey. We analysed 97 foraging trips to study the movement and oceanographic characteristics of foraging habitats of two different—yet closely related—species of shearwaters (Scopoli’s shearwater Calonectris diomedea and Cory’s shearwater C. borealis) breeding in sympatry in the Mediterranean. We combined various methodological approaches (GPS-tracking, species distribution modelling and stable isotope analysis) to explore the foraging strategies of these two species. Isotopic results suggested that trophic habits of both shearwater species were similar, mainly based on pelagic fish consumption. Foraging areas of both species were characterized by shallow waters near the colony. Both shearwater species exploited persistent productive marine areas. The foraging areas of the two species broadly overlapped during the incubation period, but during chick-rearing period, Scopoli’s shearwaters apparently foraged in different areas than Cory’s shearwaters.
N. Chatelain, M. Brucker and F. Crenner customized the GPS at the IPHC-DEPE. SEO/BirdLife provided economical support through the INDEMARES project (LIFE07NAT/E/000732). JN was supported by a postdoctoral contract of the Juan de la Cierva program (Spanish Ministry of Economy and Competitiveness). FR was supported by a postdoctoral contract from FP7-REGPOT 2010-1 (Grant No. 264125 of EcoGenes project). LC was supported by a postdoctoral contract funded by CSIC, FGCSIC and Banco Santander (Steppeahead project). |
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Materia(s):
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-Pelagic fish
-Trip duration
-Trip distance
-Breeding stage
-Alboran Basin |
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Derechos:
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(c) Springer-Verlag Berlin Heidelberg, 2013
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Tipo de documento:
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Artículo
Artículo - Versión aceptada |
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Editor:
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Springer-Verlag Berlin Heidelberg
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Compartir:
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