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56. Across-year social stability shapes network structure in wintering migrant sparrows.

Author

Shizuka, Daizaburo, Chaine, Alexis S, Anderson, Jennifer, Johnson, Oscar, Laursen, Inger Marie, and Lyon, Bruce E

Subjects
Animals, Sparrows, Animal Migration, Seasons, Population Dynamics, Flocks, MRQAP, group living, social networks, spatial communities, temporal stability, winter ecology, Ecology, Ecological Applications, Evolutionary Biology
Abstract

Migratory birds often form flocks on their wintering grounds, but important details of social structure such as the patterns of association between individuals are virtually unknown. We analysed networks of co-membership in short-term flocks for wintering golden-crowned sparrows (Zonotrichia atricapilla) across three years and discovered social complexity unsuspected for migratory songbirds. The population was consistently clustered into distinct social communities within a relatively small area (~ 7 ha). Birds returned to the same community across years, with mortality and recruitment leading to some degree of turnover in membership. These spatiotemporal patterns were explained by the combination of space use and social preference - birds that flocked together in one year flocked together again in the subsequent year more often than were expected based on degrees of home range overlap. Our results suggest that a surprising level of social fidelity across years leads to repeatable patterns of social network structure in migratory populations.

Published
2014

58. The repeatability of cognitive performance : a meta-analysis

Author

Cauchoix, M., Chow, P. K. Y., van Horik, J. O., Atance, C. M., Barbeau, E. J., Barragan-Jason, G., Bize, P., Boussard, A., Buechel, S. D., Cabirol, A., Cauchard, L., Claidière, N., Dalesman, S., Devaud, J. M., Didic, M., Doligez, B., Fagot, J., Fichtel, C., Henke-von der Malsburg, J., Hermer, E., Huber, L., Huebner, F., Kappeler, P. M., Klein, S., Langbein, J., Langley, E. J. G., Lea, S. E. G., Lihoreau, M., Lovlie, H., Matzel, L. D., Nakagawa, S., Nawroth, C., Oesterwind, S., Sauce, B., Smith, E. A., Sorato, E., Tebbich, S., Wallis, L. J., Whiteside, M. A., Wilkinson, A., Chaine, A. S., and Morand-Ferron, J.

Published
2018

66. Cognition in Context: Plasticity in Cognitive Performance in Response to Ongoing Environmental Variables

Author

Maxime Cauchoix, Alexis S. Chaine, and Gladys Barragan-Jason

Subjects
cognition, cognitive plasticity, evolution, environment, reaction norm, Evolution, QH359-425, Ecology, QH540-549.5
Abstract

Cognition has evolved to allow organisms to process, use and store information in their natural environment. Yet, cognitive abilities are traditionally measured in controlled laboratory conditions to obtain consistent and accurate measurements. Consequently, little is known about the actual effect of natural environmental variation on cognitive performances. Being able to modify cognitive performance according to environmental conditions (e.g., plasticity of attentional performances according to current predator densities) could provide evolutionary advantages. In this mini-review, we compile evidence for what we call “cognitive performance plasticity” (i.e., flexible adjustment of cognitive performance in response to the current environment). We then discuss methodological approaches associated with measurement of cognitive performance plasticity and cognition in general. Finally, we discuss the implications of acknowledging plasticity in cognitive performance, including a better understanding of the reproducibility crisis observed in cognitive sciences (Open Science Collaboration, 2015) and new lines of inquiry into the evolution of cognition and the adaptive value of cognitive performance plasticity.

Published
2020
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79. Liver transplantation as a rescue therapy for severe neurologic forms of Wilson disease

Author

Poujois, Aurélia, Sobesky, Rodolphe, Meissner, Wassilios G., Brunet, Anne-Sophie, Broussolle, Emmanuel, Laurencin, Chloé, Lion-François, Laurence, Guillaud, Olivier, Lachaux, Alain, Maillot, François, Belin, Jérémie, Salamé, Ephrem, Vanlemmens, Claire, Heyd, Bruno, Bellesme, Céline, Habes, Dalila, Bureau, Christophe, Ory-Magne, Fabienne, Chaine, Pascal, Trocello, Jean-Marc, Cherqui, Daniel, Samuel, Didier, de Ledinghen, Victor, Duclos-Vallée, Jean-Charles, and Woimant, France

Published
2020
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83. Bottom-up and top-down control of dispersal across major organismal groups

Author

Fronhofer, Emanuel A., Legrand, Delphine, Altermatt, Florian, Ansart, Armelle, Blanchet, Simon, Bonte, Dries, Chaine, Alexis, Dahirel, Maxime, De Laender, Frederik, De Raedt, Jonathan, di Gesu, Lucie, Jacob, Staffan, Kaltz, Oliver, Laurent, Estelle, Little, Chelsea J., Madec, Luc, Manzi, Florent, Masier, Stefano, Pellerin, Felix, Pennekamp, Frank, Schtickzelle, Nicolas, Therry, Lieven, Vong, Alexandre, Winandy, Laurane, and Cote, Julien

Published
2018
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93. EVOLUTION OF SEX-BIASED DISPERSAL

Author

Trochet, Audrey, Courtois, Elodie A., Stevens, Virginie M., Baguette, Michel, Chaine, Alexis, Schmeller, Dirk S., and Clobert, Jean

Published
2016

99. Beyond morphs: Inter-individual colour variation despite strong genetic determinism of colour morphs in a wild bird

Author

National Geographic Society, Fondation pour la Recherche sur la Biodiversité, Agence Nationale de la Recherche (France), Ministère de l’Enseignement supérieur et de la Recherche (France), Mould, Maya C., Huet, Michèle, Senegas, Lou, Milá, Borja, Thébaud, Christophe, Bourgeois, Yann, Chaine, Alexis S., National Geographic Society, Fondation pour la Recherche sur la Biodiversité, Agence Nationale de la Recherche (France), Ministère de l’Enseignement supérieur et de la Recherche (France), Mould, Maya C., Huet, Michèle, Senegas, Lou, Milá, Borja, Thébaud, Christophe, Bourgeois, Yann, and Chaine, Alexis S.

Abstract

Categorizing individuals into discrete forms in colour polymorphic species can overlook more subtle patterns in coloration that can be of functional significance. Thus, quantifying inter-individual variation in these species at both within- and betweenmorph levels is critical to understand the evolution of colour polymorphisms. Here we present analyses of inter-individual colour variation in the Reunion grey whiteeye (Zosterops borbonicus), a colour polymorphic wild bird endemic to the island of Reunion in which all highland populations contain two sympatric colour morphs, with birds showing predominantly grey or brown plumage, respectively. We first quantified colour variation across multiple body areas by using a continuous plumage colour score to assess variation in brown-grey coloration as well as smaller scale variation in light patches. To examine the possible causes of among-individual variation, we tested if colour variation in plumage component elements could be explained by genotypes at two markers near a major-effect locus previously related to back coloration in this species, and by other factors such as age, sex and body condition. Overall, grey-brown coloration was largely determined by genetic factors and was best described by three distinct clusters that were associated to genotypic classes (homozygotes and heterozygote), with no effect of age or sex, whereas variation in smaller light patches was primarily related to age and sex. Our results highlight the importance of characterizing subtle plumage variation beyond morph categories that are readily observable since multiple patterns of colour variation may be driven by different mechanisms, have different functions and will likely respond in different ways to selection.

Published
2023

100. Altitudinal differences in foraging decisions under predation risk in great tits.

Author

Crouchet, Thomas, Heeb, Philipp, and Chaine, Alexis S

Subjects
PREDATION, GREAT tit, LIFE history theory, PREDATOR management, POPULATION dynamics, FOOD consumption, BIRD feeders
Abstract

Foraging decisions under risk of predation are crucial for survival as predation risk can contribute to a reduction of food intake over time leading to a trade-off between starvation and predation. Environmental variation can provoke changes in food accessibility or predation risk that will in turn affect foraging decisions. Specifically, less predictable or harsher environments, such as those found at high elevation, should lead to more risk-prone foraging in order to prevent risk of starvation, but empirical confirmation of this hypothesis is lacking. In the current study, we used video playbacks combined with an automatic feeder to measure continuous foraging choices between control and predator videos by wild great tits originating from high and low elevations and tested under controlled conditions. Great tits discriminated between two conditions representing differences in predation risk and visited the feeder less frequently when a predator was shown. Moreover, we found that birds from low elevation populations were more risk-averse and visited the feeder significantly less when a predator video playback was broadcasted compared with high elevation individuals. This elevation-related contrast was also dependent on the season, body mass, and fat reserves of individuals, and was more marked in females. Furthermore, adults visited the feeder less in the presence of a predator compared with yearlings. These results are consistent with predictions from life-history theory and starvation–predation trade-off hypotheses and could have implications for individual movements and population dynamics in changing environments. [ABSTRACT FROM AUTHOR]

Published
2024
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