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Food supplementation mitigates dispersal-dependent differences in nest defence in a passerine bird
Univ Lyon 1, CNRS, UMR 5558, Lab Biometrie & Biol Evolut, F-69622 Villeurbanne, France.;Univ Lausanne, Dept Ecol & Evolut, Lausanne, Switzerland..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology. Univ Lyon 1, CNRS, UMR 5558, Lab Biometrie & Biol Evolut, F-69622 Villeurbanne, France..
Univ Lausanne, Dept Ecol & Evolut, Lausanne, Switzerland..
Univ Aberdeen, Inst Biol & Environm Sci, Aberdeen, Scotland..
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2016 (English)In: Biology Letters, ISSN 1744-9561, E-ISSN 1744-957X, Vol. 12, no 5, 20160097Article in journal (Refereed) PublishedText
Abstract [en]

Dispersing and non-dispersing individuals often differ in phenotypic traits (e.g. physiology, behaviour), but to what extent these differences are fixed or driven by external conditions remains elusive. We experimentally tested whether differences in nest-defence behaviour between dispersing and non-dispersing individuals changed with local habitat quality in collared flycatchers, by providing additional food during the nestling rearing period. In control (non-food-supplemented) nests, dispersers were less prone to defend their brood compared with non-dispersers, whereas in food-supplemented nests, dispersing and non-dispersing individuals showed equally strong nest defence. We discuss the importance of dispersal costs versus adaptive flexibility in reproductive investment in shaping these differences in nest-defence behaviour between dispersing and non-dispersing individuals. Irrespective of the underlying mechanisms, our study emphasizes the importance of accounting for environmental effects when comparing traits between dispersing and non-dispersing individuals, and in turn assessing the costs and benefits of dispersal.

Place, publisher, year, edition, pages
2016. Vol. 12, no 5, 20160097
Keyword [en]
dispersal, anti-predator behaviour, parental care, personality, habitat quality, Ficedula albicollis
National Category
Ecology
Identifiers
URN: urn:nbn:se:uu:diva-299795DOI: 10.1098/rsbl.2016.0097ISI: 000378308800010OAI: oai:DiVA.org:uu-299795DiVA: diva2:950156
Available from: 2016-07-28 Created: 2016-07-27 Last updated: 2016-07-28Bibliographically approved

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