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
2011
2.
Marianne Mugabo; Olivier Marquis; Samuel Perret; Jean-François Le Galliard
Direct and socially-mediated effects of food availability late in life on life-history variation in a short-lived lizard Journal Article
In: Oecologia, vol. 166, no. 4, pp. 949–960, 2011, ISSN: 0029-8549.
Abstract | Links | BibTeX | Tags: asymmetric competition, competition, density, density, food, life history, life history, reproduction, reproduction, Zootoca vivipara, Zootoca vivipara
@article{mugabo_direct_2011,
title = {Direct and socially-mediated effects of food availability late in life on life-history variation in a short-lived lizard},
author = {Marianne Mugabo and Olivier Marquis and Samuel Perret and Jean-François Le Galliard},
url = {https://link.springer.com/article/10.1007/s00442-011-1933-0},
doi = {https://doi.org/10.1007/s00442-011-1933-0},
issn = {0029-8549},
year = {2011},
date = {2011-01-01},
journal = {Oecologia},
volume = {166},
number = {4},
pages = {949--960},
abstract = {Food availability is a major environmental factor that can influence life history within and across generations through direct effects on individual quality and indirect effects on the intensity of intra- and intercohort competition. Here, we investigated in yearling and adult common lizards (Zootoca vivipara) the immediate and delayed life-history effects of a prolonged food deprivation in the laboratory. We generated groups of fully fed or food-deprived yearlings and adults at the end of one breeding season. These lizards were released in 16 outdoor enclosures together with yearlings and adults from the same food treatment and with food-deprived or fully fed juveniles, creating four types of experimental populations. Experimental populations were then monitored during 2 years, which revealed complex effects of food on life-history trajectories. Food availability had immediate direct effects on morphology and delayed direct effects on immunocompetence and female body condition at winter emergence. Also, male annual survival rate and female growth rate and body size were affected by an interaction between direct effects of food availability and indirect effects on asymmetric competition with juveniles. Reproductive outputs were insensitive to past food availability, suggesting that female common lizards do not solely rely on stored energy to fuel reproduction. Finally, food conditions had socially-mediated intergenerational effects on early growth and survival of offspring through their effects on the intensity of competition. This study highlights the importance of social interactions among cohorts for life-history trajectories and population dynamics in stage-structured populations.},
keywords = {asymmetric competition, competition, density, density, food, life history, life history, reproduction, reproduction, Zootoca vivipara, Zootoca vivipara},
pubstate = {published},
tppubtype = {article}
}
Food availability is a major environmental factor that can influence life history within and across generations through direct effects on individual quality and indirect effects on the intensity of intra- and intercohort competition. Here, we investigated in yearling and adult common lizards (Zootoca vivipara) the immediate and delayed life-history effects of a prolonged food deprivation in the laboratory. We generated groups of fully fed or food-deprived yearlings and adults at the end of one breeding season. These lizards were released in 16 outdoor enclosures together with yearlings and adults from the same food treatment and with food-deprived or fully fed juveniles, creating four types of experimental populations. Experimental populations were then monitored during 2 years, which revealed complex effects of food on life-history trajectories. Food availability had immediate direct effects on morphology and delayed direct effects on immunocompetence and female body condition at winter emergence. Also, male annual survival rate and female growth rate and body size were affected by an interaction between direct effects of food availability and indirect effects on asymmetric competition with juveniles. Reproductive outputs were insensitive to past food availability, suggesting that female common lizards do not solely rely on stored energy to fuel reproduction. Finally, food conditions had socially-mediated intergenerational effects on early growth and survival of offspring through their effects on the intensity of competition. This study highlights the importance of social interactions among cohorts for life-history trajectories and population dynamics in stage-structured populations.
2010
1.
Marianne Mugabo; Olivier Marquis; Samuel Perret; Jean-François Le Galliard
Immediate and delayed life history effects caused by food restriction early in life in a short-lived lizard Journal Article
In: Journal of Evolutionary Biology, vol. 23, no. 9, pp. 1886–1898, 2010.
Abstract | Links | BibTeX | Tags: asymmetric competition, cohort effects, density, food, life history, performance, stage-structured populations, trade-off
@article{mugabo_immediate_2010,
title = {Immediate and delayed life history effects caused by food restriction early in life in a short-lived lizard},
author = {Marianne Mugabo and Olivier Marquis and Samuel Perret and Jean-François Le Galliard},
url = {https://onlinelibrary.wiley.com/doi/full/10.1111/j.1420-9101.2010.02052.x},
doi = {https://doi.org/10.1111/j.1420-9101.2010.02052.x},
year = {2010},
date = {2010-01-01},
journal = {Journal of Evolutionary Biology},
volume = {23},
number = {9},
pages = {1886--1898},
abstract = {Detailed studies of the mechanisms driving life history effects of food availability are of prime importance to understand the evolution of phenotypic plasticity and the capacity of organisms to produce better adapted phenotypes. Food availability may influence life history trajectories through three nonexclusive mechanisms: (i) immediate and long-lasting effects on individual quality, and indirect delayed effects on (ii) intracohort and (iii) intercohort interactions. Using the common lizard (Zootoca vivipara), we tested whether a food deprivation during the two-first months of life influence life history (growth, survival, reproduction) and performance traits (immunocompetence, locomotor performances) until adulthood. We investigated the underlying mechanisms and their possible interactions by manipulating jointly food availability in a birth cohort and in cohorts of older conspecifics. Food deprivation had direct immediate negative effects on growth but positive long-lasting effects on immunocompetence. Food deprivation had also indirect delayed effects on growth, body size, early survival and reproduction mediated by an interaction between its direct effects on individual quality and its delayed effects on the intensity of intercohort social interactions combined with density dependence on body size. These results demonstrate that interactions between direct and socially mediated effects of past environments influence life history evolution in size-structured and stage-structured populations.},
keywords = {asymmetric competition, cohort effects, density, food, life history, performance, stage-structured populations, trade-off},
pubstate = {published},
tppubtype = {article}
}
Detailed studies of the mechanisms driving life history effects of food availability are of prime importance to understand the evolution of phenotypic plasticity and the capacity of organisms to produce better adapted phenotypes. Food availability may influence life history trajectories through three nonexclusive mechanisms: (i) immediate and long-lasting effects on individual quality, and indirect delayed effects on (ii) intracohort and (iii) intercohort interactions. Using the common lizard (Zootoca vivipara), we tested whether a food deprivation during the two-first months of life influence life history (growth, survival, reproduction) and performance traits (immunocompetence, locomotor performances) until adulthood. We investigated the underlying mechanisms and their possible interactions by manipulating jointly food availability in a birth cohort and in cohorts of older conspecifics. Food deprivation had direct immediate negative effects on growth but positive long-lasting effects on immunocompetence. Food deprivation had also indirect delayed effects on growth, body size, early survival and reproduction mediated by an interaction between its direct effects on individual quality and its delayed effects on the intensity of intercohort social interactions combined with density dependence on body size. These results demonstrate that interactions between direct and socially mediated effects of past environments influence life history evolution in size-structured and stage-structured populations.