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
2008
4.
Patrick S Fitze; Jean-François Le Galliard
Operational sex ratio, sexual conflict and the intensity of sexual selection Journal Article
In: Ecology Letters, vol. 11, pp. 432–439, 2008.
Abstract | Links | BibTeX | Tags: sex ratio, sex ratio, sexual conflict, trade-off, Zootoca vivipara
@article{fitze_operational_2008,
title = {Operational sex ratio, sexual conflict and the intensity of sexual selection},
author = {Patrick S Fitze and Jean-François Le Galliard},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1461-0248.2008.01158.x},
doi = {https://doi.org/10.1111/j.1461-0248.2008.01158.x},
year = {2008},
date = {2008-01-01},
journal = {Ecology Letters},
volume = {11},
pages = {432--439},
abstract = {Modern sexual selection theory indicates that reproductive costs rather than the
operational sex ratio predict the intensity of sexual selection. We investigated sexual
selection in the polygynandrous common lizard Lacerta vivipara. This species shows male
aggression, causing high mating costs for females when adult sex ratios (ASR) are malebiased.
We manipulated ASR in 12 experimental populations and quantified the intensity
of sexual selection based on the relationship between reproductive success and body
size. In sharp contrast to classical sexual selection theory predictions, positive directional
sexual selection on male size was stronger and positive directional selection on female
size weaker in female-biased populations than in male-biased populations. Thus,
consistent with modern theory, directional sexual selection on male size was weaker in
populations with higher female mating costs. This suggests that the costs of breeding,
but not the operational sex ratio, correctly predicted the strength of sexual selection.},
keywords = {sex ratio, sex ratio, sexual conflict, trade-off, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
Modern sexual selection theory indicates that reproductive costs rather than the
operational sex ratio predict the intensity of sexual selection. We investigated sexual
selection in the polygynandrous common lizard Lacerta vivipara. This species shows male
aggression, causing high mating costs for females when adult sex ratios (ASR) are malebiased.
We manipulated ASR in 12 experimental populations and quantified the intensity
of sexual selection based on the relationship between reproductive success and body
size. In sharp contrast to classical sexual selection theory predictions, positive directional
sexual selection on male size was stronger and positive directional selection on female
size weaker in female-biased populations than in male-biased populations. Thus,
consistent with modern theory, directional sexual selection on male size was weaker in
populations with higher female mating costs. This suggests that the costs of breeding,
but not the operational sex ratio, correctly predicted the strength of sexual selection.
operational sex ratio predict the intensity of sexual selection. We investigated sexual
selection in the polygynandrous common lizard Lacerta vivipara. This species shows male
aggression, causing high mating costs for females when adult sex ratios (ASR) are malebiased.
We manipulated ASR in 12 experimental populations and quantified the intensity
of sexual selection based on the relationship between reproductive success and body
size. In sharp contrast to classical sexual selection theory predictions, positive directional
sexual selection on male size was stronger and positive directional selection on female
size weaker in female-biased populations than in male-biased populations. Thus,
consistent with modern theory, directional sexual selection on male size was weaker in
populations with higher female mating costs. This suggests that the costs of breeding,
but not the operational sex ratio, correctly predicted the strength of sexual selection.
3.
Olivier Marquis; Manuel Massot; Jean-François Le Galliard
Intergenerational effects of climate generate cohort variation in lizard reproductive performance Journal Article
In: Ecology, vol. 89, no. 9, pp. 2575–2583, 2008.
Abstract | Links | BibTeX | Tags: climate change, intergenerational effect, life history, maternal effect, phenotypic plasticity, Zootoca vivipara
@article{marquis_intergenerational_2008,
title = {Intergenerational effects of climate generate cohort variation in lizard reproductive performance},
author = {Olivier Marquis and Manuel Massot and Jean-François Le Galliard},
url = {https://esajournals.onlinelibrary.wiley.com/doi/10.1890/07-1211.1},
doi = {https://doi.org/10.1890/07-1211.1},
year = {2008},
date = {2008-01-01},
journal = {Ecology},
volume = {89},
number = {9},
pages = {2575--2583},
abstract = {An evaluation of the link between climate and population dynamics requires
understanding of climate effects both within and across generations. In ectothermic
vertebrates, demographic responses to climate changes should crucially depend on balancing
needs for heat and water. Here, we studied how temperature and rainfall regimes experienced
before and during adulthood influenced reproductive performances (litter size, offspring size,
and survival) in a natural population of the live-bearing common lizard, Lacerta vivipara,
monitored continuously from 1989 to 2004. Rainfall regime, but not temperature, had both
immediate and delayed effects on these reproductive performances. Rainfall during the first
month of life was positively correlated with juvenile survival. Females experiencing more
rainfall during gestation produced smaller neonates that showed greater survival when
controlling for the positive effect of body size on survival. Furthermore, females that
experienced heavier rainfall when in utero produced fewer but longer neonates during
adulthood. These demographic effects of rainfall on adult reproductive traits may come from
maternal effects of climate conditions andtextbackslashor from delayed effects of rainfall on the
environment experienced early in life. Irrespective of the precise mechanism, however, this
study provides evidence of intergenerational climate effects in natural populations of an
ectothermic vertebrate.},
keywords = {climate change, intergenerational effect, life history, maternal effect, phenotypic plasticity, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
An evaluation of the link between climate and population dynamics requires
understanding of climate effects both within and across generations. In ectothermic
vertebrates, demographic responses to climate changes should crucially depend on balancing
needs for heat and water. Here, we studied how temperature and rainfall regimes experienced
before and during adulthood influenced reproductive performances (litter size, offspring size,
and survival) in a natural population of the live-bearing common lizard, Lacerta vivipara,
monitored continuously from 1989 to 2004. Rainfall regime, but not temperature, had both
immediate and delayed effects on these reproductive performances. Rainfall during the first
month of life was positively correlated with juvenile survival. Females experiencing more
rainfall during gestation produced smaller neonates that showed greater survival when
controlling for the positive effect of body size on survival. Furthermore, females that
experienced heavier rainfall when in utero produced fewer but longer neonates during
adulthood. These demographic effects of rainfall on adult reproductive traits may come from
maternal effects of climate conditions andtextbackslashor from delayed effects of rainfall on the
environment experienced early in life. Irrespective of the precise mechanism, however, this
study provides evidence of intergenerational climate effects in natural populations of an
ectothermic vertebrate.
understanding of climate effects both within and across generations. In ectothermic
vertebrates, demographic responses to climate changes should crucially depend on balancing
needs for heat and water. Here, we studied how temperature and rainfall regimes experienced
before and during adulthood influenced reproductive performances (litter size, offspring size,
and survival) in a natural population of the live-bearing common lizard, Lacerta vivipara,
monitored continuously from 1989 to 2004. Rainfall regime, but not temperature, had both
immediate and delayed effects on these reproductive performances. Rainfall during the first
month of life was positively correlated with juvenile survival. Females experiencing more
rainfall during gestation produced smaller neonates that showed greater survival when
controlling for the positive effect of body size on survival. Furthermore, females that
experienced heavier rainfall when in utero produced fewer but longer neonates during
adulthood. These demographic effects of rainfall on adult reproductive traits may come from
maternal effects of climate conditions andtextbackslashor from delayed effects of rainfall on the
environment experienced early in life. Irrespective of the precise mechanism, however, this
study provides evidence of intergenerational climate effects in natural populations of an
ectothermic vertebrate.
2004
2.
Jean-François Le Galliard; Jean Clobert; Régis Ferrière
Physical performance and Darwinian fitness in lizards Journal Article
In: Nature, vol. 432, no. 7016, pp. 502–505, 2004.
Links | BibTeX | Tags: morphology, performance, Zootoca vivipara
@article{le_galliard_physical_2004,
title = {Physical performance and Darwinian fitness in lizards},
author = {Jean-François Le Galliard and Jean Clobert and Régis Ferrière},
url = {https://www.nature.com/articles/nature03057},
doi = {https://doi.org/10.1038/nature03057},
year = {2004},
date = {2004-01-01},
journal = {Nature},
volume = {432},
number = {7016},
pages = {502--505},
keywords = {morphology, performance, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
2003
1.
Jean-François Le Galliard; Marion Le Bris; Jean Clobert
Timing of locomotor impairment and shift in thermal preferences during gravidity in a viviparous lizard Journal Article
In: Functional Ecology, vol. 17, pp. 877–885, 2003.
Links | BibTeX | Tags: reproduction, thermoregulation, Zootoca vivipara
@article{le_galliard_timing_2003,
title = {Timing of locomotor impairment and shift in thermal preferences during gravidity in a viviparous lizard},
author = {Jean-François Le Galliard and Marion Le Bris and Jean Clobert},
url = {https://besjournals.onlinelibrary.wiley.com/doi/full/10.1046/j.0269-8463.2003.00800.x},
doi = {https://doi.org/10.1046/j.0269-8463.2003.00800.x},
year = {2003},
date = {2003-01-01},
journal = {Functional Ecology},
volume = {17},
pages = {877--885},
keywords = {reproduction, thermoregulation, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}