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Van de Walle J, Sun R, Fay R, Patrick SC, Barbraud C, Delord K, Weimerkirch H, Jenouvrier S. The impact of boldness on demographic rates and life-history outcomes in the wandering albatross. J Anim Ecol 2024. [PMID: 38525860 DOI: 10.1111/1365-2656.14077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 02/06/2024] [Indexed: 03/26/2024]
Abstract
Differences among individuals within a population are ubiquitous. Those differences are known to affect the entire life cycle with important consequences for all demographic rates and outcomes. One source of among-individual phenotypic variation that has received little attention from a demographic perspective is animal personality, which is defined as consistent and heritable behavioural differences between individuals. While many studies have shown that individual variation in individual personality can generate individual differences in survival and reproductive rates, the impact of personality on all demographic rates and outcomes remains to be assessed empirically. Here, we used a unique, long-term, dataset coupling demography and personality of wandering albatross (Diomedea exulans) in the Crozet Archipelago and a comprehensive analysis based on a suite of approaches (capture-mark-recapture statistical models, Markov chains models and structured matrix population models). We assessed the effect of boldness on annual demographic rates (survival, breeding probability, breeding success), life-history outcomes (life expectancy, lifetime reproductive outcome, occupancy times), and an integrative demographic outcome (population growth rate). We found that boldness had little impact on female demographic rates, but was very likely associated with lower breeding probabilities in males. By integrating the effects of boldness over the entire life cycle, we found that bolder males had slightly lower lifetime reproductive success compared to shyer males. Indeed, bolder males spent a greater proportion of their lifetime as non-breeders, which suggests longer inter-breeding intervals due to higher reproductive allocation. Our results reveal that the link between boldness and demography is more complex than anticipated by the pace-of-life literature and highlight the importance of considering the entire life cycle with a comprehensive approach when assessing the role of personality on individual performance and demography.
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Affiliation(s)
- Joanie Van de Walle
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
- Department of Fisheries and Oceans Canada, Maurice-Lamontagne Institute, Mont-Joli, Quebec, Canada
| | - Ruijiao Sun
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
- Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
- Marine Science Institute, University of California Santa Barbara, Santa Barbara, California, USA
| | - Rémi Fay
- Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
- Laboratoire de Biometrie et Biologie Evolutive, UMR CNRS 5558, Université Lyon 1, Villeurbanne, France
| | - Samantha C Patrick
- School of Environmental Sciences, University of Liverpool, Liverpool, UK
| | - Christophe Barbraud
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle University UMR 7372, Villiers en Bois, France
| | - Karine Delord
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle University UMR 7372, Villiers en Bois, France
| | - Henri Weimerkirch
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle University UMR 7372, Villiers en Bois, France
| | - Stephanie Jenouvrier
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
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Quillfeldt P, Cherel Y, Delord K, Weimerkirch H. Cool, cold or colder? Spatial segregation of prions and blue petrels is explained by differences in preferred sea surface temperatures. Biol Lett 2016; 11:20141090. [PMID: 25878044 DOI: 10.1098/rsbl.2014.1090] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The Southern Ocean provides one of the largest environmental gradients on Earth that lacks geographical barriers, and small but highly mobile petrels living there may offer fine models of evolution of diversity along environmental gradients. Using geolocation devices, we investigated the winter distribution of closely related petrel species breeding sympatrically in the southern Indian Ocean, and applied ecological niche models to compare environmental conditions in the habitat used. We show that thin-billed prions (Pachyptila belcheri), Antarctic prions (Pachyptila desolata) and blue petrels (Halobaena caerulea) from the Kerguelen archipelago in the southern Indian Ocean segregate latitudinally, sea surface temperature being the most important variable separating the distribution of the species. Antarctic prions spent the winter north of the Polar Front in temperate waters, whereas blue petrels were found south of the Polar Front in Antarctic waters. Thin-billed prions preferred intermediate latitudes and temperatures. Stable isotope values of feathers reflected this near complete niche separation across an ecological gradient that spans large scales, and suggest evolutionary isolation by environment. In pelagic seabirds that exploit large areas of ocean, spatial niche partitioning may not only facilitate coexistence among ecologically similar species, but may also have driven their evolution in the absence of geographical barriers.
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Affiliation(s)
- Petra Quillfeldt
- Department of Animal Ecology and Systematics, Justus-Liebig-Universität Giessen, 35392 Giessen, Germany
| | - Yves Cherel
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS-Université de La Rochelle, 79360 Villiers-en-Bois, France
| | - Karine Delord
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS-Université de La Rochelle, 79360 Villiers-en-Bois, France
| | - Henri Weimerkirch
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS-Université de La Rochelle, 79360 Villiers-en-Bois, France
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