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• W2120147402 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 401:269-277 (2010) - DOI: https://doi.org/10.3354/meps08380 Use of stable isotopes to quantify seasonal changes of trophic niche and levels of population and individual specialisation in seabirds Audrey Jaeger1,*, Maëlle Connan1, Pierre Richard2, Yves Cherel1 1Centre d’Etudes Biologiques de Chizé, UPR 1934 du CNRS, 79360 Villiers-en-Bois, France 2Laboratoire Littoral, Environnement et Sociétés, UMR 6250 du CNRS-Université de La Rochelle, 2 Rue Olympe de Gouges, 17000 La Rochelle, France *Email: jaeger@cebc.cnrs.fr ABSTRACT: Niche variation is a widespread phenomenon that has important implications for ecological interactions and conservation biology, but few studies have quantified the trophic niche width (TNW) and its within- and between-individual components. We used stable isotopes of body feathers to investigate (1) seasonal isotopic niche changes of 4 southern procellariiforms and, (2) the level to which individuals are specialised relative to their population within each season. (1) δ13C and δ15N values of chicks and adults indicated a well-defined trophic segregation within the seabird assemblage during both the breeding and poorly known moulting (inter-nesting) periods, and they underlined marked species-specific seasonal changes. One species (light-mantled sooty albatross) remained within the Southern Ocean both during breeding and body feather moult, while the 3 others migrated either to oceanic subtropical waters (wandering and sooty albatrosses) or high isotopic marine areas (e.g. productive neritic waters; white-chinned petrel) during the moulting period. (2) Isotopic variances and TNW were generally low, indicating that birds belong to isotopic specialist populations within a given period. Variances and TNW were larger for white-chinned petrel chicks and light-mantled sooty albatross adults, respectively, indicating isotopic generalist populations and revealing 2 new foraging behaviours. Individual white-chinned petrel chicks segregated by their feather isotopic signatures, thus indicating individual/pair specialisation of parent birds during the chick-rearing period. The light-mantled sooty albatross population included mostly isotopic generalist individuals during the moulting period, with individuals using different habitats and diets. The study highlights the utility of feather isotopic signature for determining TNW and points out the necessity to develop such new approaches to better depict niche variations at both population and individual levels. KEY WORDS: Procellariiform · Inter-nesting period · Body feather · Specialist · Generalist · Southern Ocean Full text in pdf format PreviousNextCite this article as: Jaeger A, Connan M, Richard P, Cherel Y (2010) Use of stable isotopes to quantify seasonal changes of trophic niche and levels of population and individual specialisation in seabirds. Mar Ecol Prog Ser 401:269-277. https://doi.org/10.3354/meps08380Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 401. Online publication date: February 22, 2010 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2010 Inter-Research." @default.
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• W2120147402 title "Use of stable isotopes to quantify seasonal changes of trophic niche and levels of population and individual specialisation in seabirds" @default.
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• W2120147402 doi "https://doi.org/10.3354/meps08380" @default.
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