Check out my profile on Research Gate and on Google Scholar or explore my full publication list below. Most papers are available online through the public repository at HAL CNRS
2022
17.
Arnaud Badiane; Andréaz Dupoué; Pauline Blaimont; Donald B. Miles; Anthony L. Gilbert; Mathieu Leroux-Coyau; Anna Kawamoto; David Rozen-Rechels; Sandrine Meylan; Jean Clobert; Jean-François Le Galliard
Environmental conditions and male quality traits simultaneously explain variation of multiple colour signals in male lizards Journal Article
In: Journal of Animal Ecology, vol. n/a, no. n/a, 2022, ISSN: 1365-2656, (_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13773).
Abstract | Links | BibTeX | Tags: Zootoca vivipara
@article{badiane_environmental_2022,
title = {Environmental conditions and male quality traits simultaneously explain variation of multiple colour signals in male lizards},
author = {Arnaud Badiane and Andréaz Dupoué and Pauline Blaimont and Donald B. Miles and Anthony L. Gilbert and Mathieu Leroux-Coyau and Anna Kawamoto and David Rozen-Rechels and Sandrine Meylan and Jean Clobert and Jean-François Le Galliard},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/1365-2656.13773},
doi = {10.1111/1365-2656.13773},
issn = {1365-2656},
year = {2022},
date = {2022-01-01},
urldate = {2022-08-01},
journal = {Journal of Animal Ecology},
volume = {n/a},
number = {n/a},
abstract = {Male lizards often display multiple pigment-based and structural colour signals which may reflect various quality traits (e.g. performance, parasitism), with testosterone (T) often mediating these relationships. Furthermore, environmental conditions can explain colour signal variation by affecting processes such as signal efficacy, thermoregulation, and camouflage. The relationships between colour signals, male quality traits, and environmental factors have often been analysed in isolation, but simultaneous analyses are rare. Thus, the response of multiple colour signals to variation in all these factors in an integrative analysis remains to be investigated. Here, we investigated how multiple colour signals relate to their information content, examined the role of T as a potential mediator of these relationships, and how environmental factors explain colour signal variation. We performed an integrative study to examine the covariation between three colour signals (melanin-based black, carotenoid-based yellow-orange, and structural UV), physiological performance, parasitism, T levels, and environmental factors (microclimate, forest cover) in male common lizards (Zootoca vivipara) from 13 populations. We found that the three colour signals conveyed information on different aspects of male condition, supporting a multiple message hypothesis. T influenced only parasitism, suggesting that T does not directly mediate the relationships between colour signals and their information content. Moreover, colour signals became more saturated in forested habitats, suggesting an adaptation to degraded light conditions, and became generally brighter in mesic conditions, in contradiction with the thermal melanism hypothesis. We show that distinct individual quality traits and environmental factors simultaneously explain variations of multiple colour signals with different production modes. Our study therefore highlights the complexity of colour signal evolution, involving various sets of selective pressures acting at the same time, but in different ways depending on colour production mechanism.},
note = {_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13773},
keywords = {Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
Male lizards often display multiple pigment-based and structural colour signals which may reflect various quality traits (e.g. performance, parasitism), with testosterone (T) often mediating these relationships. Furthermore, environmental conditions can explain colour signal variation by affecting processes such as signal efficacy, thermoregulation, and camouflage. The relationships between colour signals, male quality traits, and environmental factors have often been analysed in isolation, but simultaneous analyses are rare. Thus, the response of multiple colour signals to variation in all these factors in an integrative analysis remains to be investigated. Here, we investigated how multiple colour signals relate to their information content, examined the role of T as a potential mediator of these relationships, and how environmental factors explain colour signal variation. We performed an integrative study to examine the covariation between three colour signals (melanin-based black, carotenoid-based yellow-orange, and structural UV), physiological performance, parasitism, T levels, and environmental factors (microclimate, forest cover) in male common lizards (Zootoca vivipara) from 13 populations. We found that the three colour signals conveyed information on different aspects of male condition, supporting a multiple message hypothesis. T influenced only parasitism, suggesting that T does not directly mediate the relationships between colour signals and their information content. Moreover, colour signals became more saturated in forested habitats, suggesting an adaptation to degraded light conditions, and became generally brighter in mesic conditions, in contradiction with the thermal melanism hypothesis. We show that distinct individual quality traits and environmental factors simultaneously explain variations of multiple colour signals with different production modes. Our study therefore highlights the complexity of colour signal evolution, involving various sets of selective pressures acting at the same time, but in different ways depending on colour production mechanism.
2016
16.
Alexis Rutschmann; Donald B Miles; Jean-François Le Galliard; Murielle Richard; Sylvain Moulherat; Barry Sinervo; Jean Clobert
Climate and habitat interact to shape the thermal reaction norms of breeding phenology across lizard populations Journal Article
In: Journal of Animal Ecology, vol. 85, no. 2, pp. 457–466, 2016, ISSN: 1365-2656.
Abstract | Links | BibTeX | Tags: phenology, phenology, phenotypic plasticity, phenotypic plasticity, thermal sensitivity, Zootoca vivipara
@article{rutschmann_climate_2016,
title = {Climate and habitat interact to shape the thermal reaction norms of breeding phenology across lizard populations},
author = {Alexis Rutschmann and Donald B Miles and Jean-François Le Galliard and Murielle Richard and Sylvain Moulherat and Barry Sinervo and Jean Clobert},
url = {https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2656.12473},
doi = {https://doi.org/10.1111/1365-2656.12473},
issn = {1365-2656},
year = {2016},
date = {2016-01-01},
journal = {Journal of Animal Ecology},
volume = {85},
number = {2},
pages = {457--466},
abstract = {* Substantial plastic variation in phenology in response to environmental heterogeneity through time in the same population has been uncovered in many species. However, our understanding of differences in reaction norms of phenology among populations from a given species remains limited. * As the plasticity of phenological traits is often influenced by local thermal conditions, we expect local temperature to generate variation in the reaction norms between populations. * Here, we explored temporal variation in parturition date across 11 populations of the common lizard (Zootoca vivipara) from four mountain chains as a function of air temperatures during mid-gestation. We characterized among-population variation to assess how local weather conditions (mean and variance of ambient temperatures during mid-gestation) and habitat openness (an index of anthropogenic disturbance) influence the thermal reaction norms of the parturition date. * Our results provide evidence of interactive effects of anthropogenic disturbance and thermal conditions, with earlier parturition dates in warmer years on average especially in closed habitats. * Variation in the reaction norms for parturition date was correlated with mean local thermal conditions at a broad geographical scale. However, populations exposed to variable thermal conditions had flatter thermal reaction norms. * Assessing whether environmental heterogeneity drives differentiation among reaction norms is crucial to estimate the capacity of different populations to contend with projected climatic and anthropogenic challenges.},
keywords = {phenology, phenology, phenotypic plasticity, phenotypic plasticity, thermal sensitivity, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
* Substantial plastic variation in phenology in response to environmental heterogeneity through time in the same population has been uncovered in many species. However, our understanding of differences in reaction norms of phenology among populations from a given species remains limited. * As the plasticity of phenological traits is often influenced by local thermal conditions, we expect local temperature to generate variation in the reaction norms between populations. * Here, we explored temporal variation in parturition date across 11 populations of the common lizard (Zootoca vivipara) from four mountain chains as a function of air temperatures during mid-gestation. We characterized among-population variation to assess how local weather conditions (mean and variance of ambient temperatures during mid-gestation) and habitat openness (an index of anthropogenic disturbance) influence the thermal reaction norms of the parturition date. * Our results provide evidence of interactive effects of anthropogenic disturbance and thermal conditions, with earlier parturition dates in warmer years on average especially in closed habitats. * Variation in the reaction norms for parturition date was correlated with mean local thermal conditions at a broad geographical scale. However, populations exposed to variable thermal conditions had flatter thermal reaction norms. * Assessing whether environmental heterogeneity drives differentiation among reaction norms is crucial to estimate the capacity of different populations to contend with projected climatic and anthropogenic challenges.
2013
15.
Jean-François Le Galliard; Mathieu Paquet; Matthieu Cisel; Laeticia Montes-Poloni
Personality and the pace-of-life syndrome: variation and selection on activity, metabolism and locomotor performances Journal Article
In: Functional Ecology, vol. 27, no. 1, pp. 136–144, 2013.
Links | BibTeX | Tags: activity, boldness, pace of life, personality, Zootoca vivipara
@article{le_galliard_personality_2013,
title = {Personality and the pace-of-life syndrome: variation and selection on activity, metabolism and locomotor performances},
author = {Jean-François Le Galliard and Mathieu Paquet and Matthieu Cisel and Laeticia Montes-Poloni},
url = {https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2435.12017},
doi = {https://doi.org/10.1111/1365-2435.12017},
year = {2013},
date = {2013-01-01},
journal = {Functional Ecology},
volume = {27},
number = {1},
pages = {136--144},
keywords = {activity, boldness, pace of life, personality, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
14.
Paulina Artacho; Isabelle Jouanneau; Jean-François Le Galliard
Interindividual variation in thermal sensitivity of maximal sprint speed, thermal behavior, and resting metabolic rate in a lizard Journal Article
In: Physiological and Biochemical Zoology, vol. 86, no. 4, pp. 458–469, 2013, ISSN: 1522-2152.
Abstract | Links | BibTeX | Tags: metabolism, thermal sensitivity, Zootoca vivipara
@article{artacho_interindividual_2013,
title = {Interindividual variation in thermal sensitivity of maximal sprint speed, thermal behavior, and resting metabolic rate in a lizard},
author = {Paulina Artacho and Isabelle Jouanneau and Jean-François Le Galliard},
url = {https://www.journals.uchicago.edu/doi/abs/10.1086/671376},
doi = {https://doi.org/10.1086/671376},
issn = {1522-2152},
year = {2013},
date = {2013-01-01},
journal = {Physiological and Biochemical Zoology},
volume = {86},
number = {4},
pages = {458--469},
abstract = {Studies of the relationship of performance and behavioral traits with environmental factors have tended to neglect interindividual variation even though quantification of this variation is fundamental to understanding how phenotypic traits can evolve. In ectotherms, functional integration of locomotor performance, thermal behavior, and energy metabolism is of special interest because of the potential for coadaptation among these traits. For this reason, we analyzed interindividual variation, covariation, and repeatability of the thermal sensitivity of maximal sprint speed, preferred body temperature, thermal precision, and resting metabolic rate measured in ca. 200 common lizards (Zootoca vivipara) that varied by sex, age, and body size. We found significant interindividual variation in selected body temperatures and in the thermal performance curve of maximal sprint speed for both the intercept (expected trait value at the average temperature) and the slope (measure of thermal sensitivity). Interindividual differences in maximal sprint speed across temperatures, preferred body temperature, and thermal precision were significantly repeatable. A positive relationship existed between preferred body temperature and thermal precision, implying that individuals selecting higher temperatures were more precise. The resting metabolic rate was highly variable but was not related to thermal sensitivity of maximal sprint speed or thermal behavior. Thus, locomotor performance, thermal behavior, and energy metabolism were not directly functionally linked in the common lizard.},
keywords = {metabolism, thermal sensitivity, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
Studies of the relationship of performance and behavioral traits with environmental factors have tended to neglect interindividual variation even though quantification of this variation is fundamental to understanding how phenotypic traits can evolve. In ectotherms, functional integration of locomotor performance, thermal behavior, and energy metabolism is of special interest because of the potential for coadaptation among these traits. For this reason, we analyzed interindividual variation, covariation, and repeatability of the thermal sensitivity of maximal sprint speed, preferred body temperature, thermal precision, and resting metabolic rate measured in ca. 200 common lizards (Zootoca vivipara) that varied by sex, age, and body size. We found significant interindividual variation in selected body temperatures and in the thermal performance curve of maximal sprint speed for both the intercept (expected trait value at the average temperature) and the slope (measure of thermal sensitivity). Interindividual differences in maximal sprint speed across temperatures, preferred body temperature, and thermal precision were significantly repeatable. A positive relationship existed between preferred body temperature and thermal precision, implying that individuals selecting higher temperatures were more precise. The resting metabolic rate was highly variable but was not related to thermal sensitivity of maximal sprint speed or thermal behavior. Thus, locomotor performance, thermal behavior, and energy metabolism were not directly functionally linked in the common lizard.
2012
13.
Delphine Legrand; Olivier Guillaume; Michel Baguette; Julien Cote; Audrey Trochet; Olivier Calvez; Susanne Zajitschek; Felix Zajitschek; Jane Lecomte; Quentin Benard; Jean-François Le Galliard; Jean Clobert
The Metatron: an experimental system to study dispersal and metaecosystems for terrestrial organisms Journal Article
In: Nature Methods, vol. 9, no. 8, pp. 828–834, 2012, ISSN: 1548-7091.
Abstract | Links | BibTeX | Tags: behaviour, metapopulation, metapopulation, Zootoca vivipara
@article{legrand_metatron_2012,
title = {The Metatron: an experimental system to study dispersal and metaecosystems for terrestrial organisms},
author = {Delphine Legrand and Olivier Guillaume and Michel Baguette and Julien Cote and Audrey Trochet and Olivier Calvez and Susanne Zajitschek and Felix Zajitschek and Jane Lecomte and Quentin Benard and Jean-François Le Galliard and Jean Clobert},
url = {https://www.nature.com/articles/nmeth.2104},
doi = {https://doi.org/10.1038/nmeth.2104},
issn = {1548-7091},
year = {2012},
date = {2012-01-01},
journal = {Nature Methods},
volume = {9},
number = {8},
pages = {828--834},
abstract = {Dispersal of organisms generates gene flow between populations. Identifying factors that influence dispersal will help predict how species will cope with rapid environmental change. We developed an innovative infrastructure, the Metatron, composed of 48 interconnected patches, designed for the study of terrestrial organism movement as a model for dispersal. Corridors between patches can be flexibly open or closed. Temperature, humidity and illuminance can be independently controlled within each patch. The modularity and adaptability of the Metatron provide the opportunity for robust experimental design for the study of 'meta-systems'. We describe a pilot experiment on populations of the butterfly Pieris brassicae and the lizard Zootoca vivipara in the Metatron. Both species survived and showed both disperser and resident phenotypes. The Metatron offers the opportunity to test theoretical models in spatial ecology.},
keywords = {behaviour, metapopulation, metapopulation, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
Dispersal of organisms generates gene flow between populations. Identifying factors that influence dispersal will help predict how species will cope with rapid environmental change. We developed an innovative infrastructure, the Metatron, composed of 48 interconnected patches, designed for the study of terrestrial organism movement as a model for dispersal. Corridors between patches can be flexibly open or closed. Temperature, humidity and illuminance can be independently controlled within each patch. The modularity and adaptability of the Metatron provide the opportunity for robust experimental design for the study of 'meta-systems'. We describe a pilot experiment on populations of the butterfly Pieris brassicae and the lizard Zootoca vivipara in the Metatron. Both species survived and showed both disperser and resident phenotypes. The Metatron offers the opportunity to test theoretical models in spatial ecology.
2011
12.
Joséfa Bleu; Jean-François Le Galliard; Sandrine Meylan; Manuel Massot; Patrick S Fitze
Mating does not influence reproductive investment in a viviparous lizard Journal Article
In: Journal of Experimental Zoology Part a-Ecological Genetics and Physiology, vol. 315A, no. 8, pp. 458–464, 2011, ISSN: 1932-5223.
Abstract | Links | BibTeX | Tags: life history, performance, squamate reptiles, thermal preferences, trade-off, Zootoca vivipara, Zootoca vivipara
@article{bleu_mating_2011,
title = {Mating does not influence reproductive investment in a viviparous lizard},
author = {Joséfa Bleu and Jean-François Le Galliard and Sandrine Meylan and Manuel Massot and Patrick S Fitze},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/jez.693},
doi = {https://doi.org/10.1002/jez.693},
issn = {1932-5223},
year = {2011},
date = {2011-01-01},
journal = {Journal of Experimental Zoology Part a-Ecological Genetics and Physiology},
volume = {315A},
number = {8},
pages = {458--464},
abstract = {Mating is crucial for females that reproduce exclusively sexually and should influence their investment into reproduction. Although reproductive adjustments in response to mate quality have been tested in a wide range of species, the effect of exposure to males and mating per se has seldom been studied. Compensatory mechanisms against the absence of mating may evolve more frequently in viviparous females, which pay higher direct costs of reproduction, due to gestation, than oviparous females. To test the existence of such mechanisms in a viviparous species, we experimentally manipulated the mating opportunity of viviparous female lizard, Lacerta (Zootoca) vivipara. We assessed the effect of mating on ovulation, postpartum body condition and parturition date, as well as on changes in locomotor performances and body temperatures during the breeding cycle. Female lizards ovulated spontaneously and mating had no influence on litter size, locomotor impairment or on selected body temperature. However, offspring production induced a more pronounced locomotor impairment and physical burden than the production of undeveloped eggs. Postpartum body condition and parturition dates were not different among females. This result suggests that gestation length is not determined by an embryonic signal. In the common lizard, viviparity is not associated with facultative ovulation and a control of litter size after ovulation, in response to the absence of mating. J. Exp. Zool. 315:458-464, 2011. (C) 2011 Wiley-Liss, Inc.},
keywords = {life history, performance, squamate reptiles, thermal preferences, trade-off, Zootoca vivipara, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
Mating is crucial for females that reproduce exclusively sexually and should influence their investment into reproduction. Although reproductive adjustments in response to mate quality have been tested in a wide range of species, the effect of exposure to males and mating per se has seldom been studied. Compensatory mechanisms against the absence of mating may evolve more frequently in viviparous females, which pay higher direct costs of reproduction, due to gestation, than oviparous females. To test the existence of such mechanisms in a viviparous species, we experimentally manipulated the mating opportunity of viviparous female lizard, Lacerta (Zootoca) vivipara. We assessed the effect of mating on ovulation, postpartum body condition and parturition date, as well as on changes in locomotor performances and body temperatures during the breeding cycle. Female lizards ovulated spontaneously and mating had no influence on litter size, locomotor impairment or on selected body temperature. However, offspring production induced a more pronounced locomotor impairment and physical burden than the production of undeveloped eggs. Postpartum body condition and parturition dates were not different among females. This result suggests that gestation length is not determined by an embryonic signal. In the common lizard, viviparity is not associated with facultative ovulation and a control of litter size after ovulation, in response to the absence of mating. J. Exp. Zool. 315:458-464, 2011. (C) 2011 Wiley-Liss, Inc.
11.
Patrick S Fitze; Jean-François Le Galliard
Inconsistency between different measures of sexual selection Journal Article
In: The American Naturalist, vol. 178, no. 2, pp. 256–268, 2011, ISSN: 0003-0147.
Abstract | Links | BibTeX | Tags: competition, microsatellite markers, natural selection, sex ratio, sexual selection, Zootoca vivipara, Zootoca vivipara
@article{fitze_inconsistency_2011,
title = {Inconsistency between different measures of sexual selection},
author = {Patrick S Fitze and Jean-François Le Galliard},
url = {https://www.journals.uchicago.edu/doi/abs/10.1086/660826},
doi = {https://doi.org/10.1086/660826},
issn = {0003-0147},
year = {2011},
date = {2011-01-01},
journal = {The American Naturalist},
volume = {178},
number = {2},
pages = {256--268},
abstract = {Measuring the intensity of sexual selection is of fundamental importance to the study of sexual dimorphism, population dynamics, and speciation. Several indices, pools of individuals, and fitness proxies are used in the literature, yet their relative performances are strongly debated. Using 12 independent common lizard populations, we manipulated the adult sex ratio, a potentially important determinant of the intensity of sexual selection at a particular time and place. We investigated differences in the intensity of sexual selection, as estimated using three standard indices of sexual selection-the standardized selection gradient (beta'), the opportunity of selection (I), and the Bateman gradient (beta(ss))-calculated for different pools of individuals and different fitness proxies. We show that results based on estimates of I were the opposite of those derived from the other indices, whereas results based on estimates of beta' were consistent with predictions derived from knowledge about the species' mating system. In addition, our estimates of the strength and direction of sexual selection depended on both the fitness proxy used and the pool of individuals included in the analysis. These observations demonstrate inconsistencies in distinct measures of sexual selection and underscore the need for caution when comparing studies and species.},
keywords = {competition, microsatellite markers, natural selection, sex ratio, sexual selection, Zootoca vivipara, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
Measuring the intensity of sexual selection is of fundamental importance to the study of sexual dimorphism, population dynamics, and speciation. Several indices, pools of individuals, and fitness proxies are used in the literature, yet their relative performances are strongly debated. Using 12 independent common lizard populations, we manipulated the adult sex ratio, a potentially important determinant of the intensity of sexual selection at a particular time and place. We investigated differences in the intensity of sexual selection, as estimated using three standard indices of sexual selection-the standardized selection gradient (beta'), the opportunity of selection (I), and the Bateman gradient (beta(ss))-calculated for different pools of individuals and different fitness proxies. We show that results based on estimates of I were the opposite of those derived from the other indices, whereas results based on estimates of beta' were consistent with predictions derived from knowledge about the species' mating system. In addition, our estimates of the strength and direction of sexual selection depended on both the fitness proxy used and the pool of individuals included in the analysis. These observations demonstrate inconsistencies in distinct measures of sexual selection and underscore the need for caution when comparing studies and species.
10.
Manuela González-Suárez; Jean-François Le Galliard; David Claessen
Population and life-history consequences of within-cohort individual variation Journal Article
In: The American Naturalist, vol. 178, no. 4, pp. 525–537, 2011, ISSN: 0003-0147.
Abstract | Links | BibTeX | Tags: body size, demography, demography, density, metabolism, performance, phenotypic plasticity, phenotypic plasticity, size-structured populations, stochasticity, structured population models, Zootoca vivipara, Zootoca vivipara, Zootoca vivipara
@article{gonzalez-suarez_population_2011,
title = {Population and life-history consequences of within-cohort individual variation},
author = {Manuela González-Suárez and Jean-François Le Galliard and David Claessen},
url = {https://www.journals.uchicago.edu/doi/abs/10.1086/661906},
doi = {https://doi.org/10.1086/661906},
issn = {0003-0147},
year = {2011},
date = {2011-01-01},
journal = {The American Naturalist},
volume = {178},
number = {4},
pages = {525--537},
abstract = {The consequences of within-cohort (i.e., among-individual) variation for population dynamics are poorly understood, in particular for the case where life history is density dependent. We develop a physiologically structured population model that incorporates individual variation among and within cohorts and allows us to explore the intertwined relationship between individual life history and population dynamics. Our model is parameterized for the lizard Zootoca vivipara and reproduces well the species' dynamics and life history. We explore two common mechanisms that generate within-cohort variation: variability in food intake and variability in birth date. Predicted population dynamics are inherently very stable and do not qualitatively change when either of these sources of individual variation is introduced. However, increased within-cohort variation in food intake leads to changes in morphology, with longer but skinnier individuals, even though mean food intake does not change. Morphological changes result from a seemingly universal nonlinear relationship between growth and resource availability but may become apparent only in environments with strongly fluctuating resources. Overall, our results highlight the importance of using a mechanistic framework to gain insights into how different sources of intraspecific variability translate into life-history and population-dynamic changes.},
keywords = {body size, demography, demography, density, metabolism, performance, phenotypic plasticity, phenotypic plasticity, size-structured populations, stochasticity, structured population models, Zootoca vivipara, Zootoca vivipara, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
The consequences of within-cohort (i.e., among-individual) variation for population dynamics are poorly understood, in particular for the case where life history is density dependent. We develop a physiologically structured population model that incorporates individual variation among and within cohorts and allows us to explore the intertwined relationship between individual life history and population dynamics. Our model is parameterized for the lizard Zootoca vivipara and reproduces well the species' dynamics and life history. We explore two common mechanisms that generate within-cohort variation: variability in food intake and variability in birth date. Predicted population dynamics are inherently very stable and do not qualitatively change when either of these sources of individual variation is introduced. However, increased within-cohort variation in food intake leads to changes in morphology, with longer but skinnier individuals, even though mean food intake does not change. Morphological changes result from a seemingly universal nonlinear relationship between growth and resource availability but may become apparent only in environments with strongly fluctuating resources. Overall, our results highlight the importance of using a mechanistic framework to gain insights into how different sources of intraspecific variability translate into life-history and population-dynamic changes.
2007
9.
Patrick S Fitze; Jean-François Le Galliard; Pierre Federici; Muriele Richard; Jean Clobert
Conflict over multiple-partner mating between males and females of the polygynandrous common lizards Journal Article
In: Evolution, vol. 59, no. 11, pp. 2451–2459, 2007.
Links | BibTeX | Tags: sexual conflict, sexual harassment, sexual selection, Zootoca vivipara
@article{fitze_conflict_2007,
title = {Conflict over multiple-partner mating between males and females of the polygynandrous common lizards},
author = {Patrick S Fitze and Jean-François Le Galliard and Pierre Federici and Muriele Richard and Jean Clobert},
url = {https://bioone.org/journals/Evolution/volume-59/issue-11/05-208.1/CONFLICT-OVER-MULTIPLE-PARTNER-MATING-BETWEEN-MALES-AND-FEMALES-OF/10.1554/05-208.1.short},
doi = {https://doi.org/10.1554/05-208.1},
year = {2007},
date = {2007-01-01},
urldate = {2007-01-01},
journal = {Evolution},
volume = {59},
number = {11},
pages = {2451--2459},
keywords = {sexual conflict, sexual harassment, sexual selection, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
2006
8.
Jean-François Le Galliard; Manuel Massot; Meta M Landys; Sandrine Meylan; Jean Clobert
Ontogenic sources of variation in sexual size dimorphism in a viviparous lizard Journal Article
In: Journal of Evolutionary Biology, vol. 19, no. 3, pp. 690–704, 2006.
BibTeX | Tags: body size, maternal effect, phenotypic plasticity, sexual size dimorphism, viviparity, Zootoca vivipara
@article{le_galliard_ontogenic_2006-1,
title = {Ontogenic sources of variation in sexual size dimorphism in a viviparous lizard},
author = {Jean-François Le Galliard and Manuel Massot and Meta M Landys and Sandrine Meylan and Jean Clobert},
year = {2006},
date = {2006-01-01},
journal = {Journal of Evolutionary Biology},
volume = {19},
number = {3},
pages = {690--704},
keywords = {body size, maternal effect, phenotypic plasticity, sexual size dimorphism, viviparity, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
2005
7.
Jean-François Le Galliard; Patrick Fitze; Régis Ferrière; Jean Clobert
Sex ratio bias, male aggression, and population collapse in lizards Journal Article
In: Proceedings of the National Academy of Sciences USA, vol. 102, no. 50, pp. 18231–18236, 2005.
Links | BibTeX | Tags: extinction, sex ratio, sexual conflict, sexual selection, squamate reptiles, Zootoca vivipara
@article{le_galliard_sex_2005,
title = {Sex ratio bias, male aggression, and population collapse in lizards},
author = {Jean-François Le Galliard and Patrick Fitze and Régis Ferrière and Jean Clobert},
url = {https://www.pnas.org/content/102/50/18231},
doi = {https://doi.org/10.1073/pnas.0505172102},
year = {2005},
date = {2005-01-01},
journal = {Proceedings of the National Academy of Sciences USA},
volume = {102},
number = {50},
pages = {18231--18236},
keywords = {extinction, sex ratio, sexual conflict, sexual selection, squamate reptiles, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
6.
Jean-François Le Galliard; Régis Ferrière; Jean Clobert
Juvenile growth and survival under dietary restriction: are males and females equal? Journal Article
In: Oikos, vol. 111, pp. 368–376, 2005.
Links | BibTeX | Tags: body growth, body size, phenotypic plasticity, sexual size dimorphism, squamate reptiles, survival, Zootoca vivipara
@article{le_galliard_juvenile_2005,
title = {Juvenile growth and survival under dietary restriction: are males and females equal?},
author = {Jean-François Le Galliard and Régis Ferrière and Jean Clobert},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/j.0030-1299.2005.14163.x},
doi = {https://doi.org/10.1111/j.0030-1299.2005.14163.x},
year = {2005},
date = {2005-01-01},
journal = {Oikos},
volume = {111},
pages = {368--376},
keywords = {body growth, body size, phenotypic plasticity, sexual size dimorphism, squamate reptiles, survival, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
5.
Jean-François Le Galliard; Régis Ferrière; Jean Clobert
Effect of patch occupancy on immigration in the common lizard Journal Article
In: Journal of Animal Ecology, vol. 74, no. 2, pp. 241–249, 2005.
Links | BibTeX | Tags: colonisation, competition, conspecific attraction, dispersal, Zootoca vivipara
@article{le_galliard_effect_2005,
title = {Effect of patch occupancy on immigration in the common lizard},
author = {Jean-François Le Galliard and Régis Ferrière and Jean Clobert},
url = {https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/j.1365-2656.2005.00912.x},
doi = {https://doi.org/10.1111/j.1365-2656.2005.00912.x},
year = {2005},
date = {2005-01-01},
journal = {Journal of Animal Ecology},
volume = {74},
number = {2},
pages = {241--249},
keywords = {colonisation, competition, conspecific attraction, dispersal, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
4.
Patrick F Fitze; Jean-François Le Galliard; Pierre Federici; Murielle Richard; Jean Clobert
Conflict over multiple partner mating among males and females of polygynandrous common lizards Journal Article
In: Evolution, vol. 59, no. 11, pp. 2451–2459, 2005.
Links | BibTeX | Tags: mating system, sex ratio, sexual conflict, sexual selection, sexual selection, squamate reptiles, Zootoca vivipara
@article{fitze_conflict_2005,
title = {Conflict over multiple partner mating among males and females of polygynandrous common lizards},
author = {Patrick F Fitze and Jean-François Le Galliard and Pierre Federici and Murielle Richard and Jean Clobert},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/j.0014-3820.2005.tb00954.x},
doi = {https://doi.org/10.1111/j.0014-3820.2005.tb00954.x},
year = {2005},
date = {2005-01-01},
journal = {Evolution},
volume = {59},
number = {11},
pages = {2451--2459},
keywords = {mating system, sex ratio, sexual conflict, sexual selection, sexual selection, squamate reptiles, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
2003
3.
Jean-François Le Galliard; Régis Ferrière; Jean Clobert
Mother–offspring interactions affect natal dispersal in a lizard Journal Article
In: Proceedings of the Royal Society of London. Series B: Biological Sciences, vol. 270, no. 1520, pp. 1163–1169, 2003.
Links | BibTeX | Tags: density, dispersal, kin competition, Zootoca vivipara
@article{galliard_motheroffspring_2003,
title = {Mother–offspring interactions affect natal dispersal in a lizard},
author = {Jean-François Le Galliard and Régis Ferrière and Jean Clobert},
url = {https://royalsocietypublishing.org/doi/10.1098/rspb.2003.2360},
doi = {https://doi.org/10.1098/rspb.2003.2360},
year = {2003},
date = {2003-01-01},
journal = {Proceedings of the Royal Society of London. Series B: Biological Sciences},
volume = {270},
number = {1520},
pages = {1163--1169},
keywords = {density, dispersal, kin competition, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
2.
Jean-François Le Galliard
Interactions sociales et dispersion dans des populations structurées dans léspace PhD Thesis
Paris VI, Ecology, 2003.
Links | BibTeX | Tags: altruism, density, dispersal, kin competition, Zootoca vivipara
@phdthesis{le_galliard_interactions_2003,
title = {Interactions sociales et dispersion dans des populations structurées dans léspace},
author = {Jean-François Le Galliard},
url = {https://zenodo.org/record/3529133},
year = {2003},
date = {2003-01-01},
address = {Paris},
school = {Paris VI, Ecology},
keywords = {altruism, density, dispersal, kin competition, Zootoca vivipara},
pubstate = {published},
tppubtype = {phdthesis}
}
1999
1.
Jean-François Le Galliard
Compétition locale, coopération et mobilité. Approches théoriques et expérimentales Masters Thesis
Paris, 1999.
BibTeX | Tags: competition, cooperation, dispersal, kin selection, Zootoca vivipara
@mastersthesis{le_galliard_competition_1999,
title = {Compétition locale, coopération et mobilité. Approches théoriques et expérimentales},
author = {Jean-François Le Galliard},
year = {1999},
date = {1999-01-01},
address = {Paris},
institution = {Université Pierre et Marie Curie},
keywords = {competition, cooperation, dispersal, kin selection, Zootoca vivipara},
pubstate = {published},
tppubtype = {mastersthesis}
}