Articles, books and book chapters

@article{le_galliard_climate_2025,

title = {Climate warming and temporal variation in reproductive strategies in the endangered meadow viper},

author = {Jean-François Le Galliard and Malo Jaffré and Thomas Tully and Jean-Pierre Baron},

url = {https://doi.org/10.1007/s00442-024-05645-5},

doi = {10.1007/s00442-024-05645-5},

issn = {1432-1939},

year  = {2025},

date = {2025-01-01},

urldate = {2025-02-28},

journal = {Oecologia},

volume = {207},

number = {1},

pages = {12},

abstract = {Anthropogenic climate change poses a significant threat to species on the brink of extinction. Many non-avian reptiles are endangered, but uncovering their vulnerability to climate warming is challenging, because this requires analyzing the climate sensitivity of different life stages and modeling population growth rates. Such efforts are currently hampered by a lack of long-term life-history data. In this study, we used over 3 decades of mark-recapture data from a natural population of the endangered meadow viper (Vipera ursinii ursinii) to unravel the patterns of temporal variation in reproductive traits, the local climatic determinants of inter-annual variation in reproduction, and the potential buffering effects of life cycle on population growth rate. We found significant inter-annual variation in body growth, gestation length, post-parturition body condition, clutch success, and offspring traits at birth, while reproductive effort showed little temporal variation. Temperature during gestation was the most critical factor, reducing gestation length and increasing both clutch success and post-parturition body condition. In contrast, neither air humidity nor global radiation affected reproductive outcomes. This population had a negative growth rate with minimal temporal variation, indicating a rapid decline largely independent of climatic conditions. Overall, the viper’s life-history traits appeared to be buffered against temporal variation in climatic conditions, with this declining population potentially benefiting on the short term from rising local temperatures.},

keywords = {body growth, Gestation, Rainfall, reproduction, temperature},

pubstate = {published},

tppubtype = {article}

}

@article{Bruschjeb228064,

title = {Additive effects of temperature and water availability on pregnancy in a viviparous lizard},

author = {George A Brusch and Rodrigo S B Gavira and Robin Viton and Andréaz Dupoué and Mathieu Leroux-Coyau and Sandrine Meylan and Jean-Fran{c c}ois Le Galliard and Olivier Lourdais},

url = {https://jeb.biologists.org/content/223/19/jeb228064},

doi = {10.1242/jeb.228064},

issn = {0022-0949},

year  = {2020},

date = {2020-01-01},

journal = {Journal of Experimental Biology},

volume = {223},

number = {19},

publisher = {The Company of Biologists Ltd},

abstract = {One of the greatest current threats to biodiversity is climate change. However, understanding of organismal responses to fluctuations in temperature and water availability is currently lacking, especially during fundamental life-history stages such as reproduction. To further explore how temperature and water availability impact maternal physiology and reproductive output, we used the viviparous form of the European common lizard (Zootoca vivipara) in a two-by-two factorial design manipulating both hydric and thermal conditions, for the first time. We collected blood samples and morphological measurements during early pregnancy and post-parturition to investigate how water availability, temperature and a combination of the two influence maternal phenology, morphology, physiology and reproductive output. We observed that dehydration during gestation negatively affects maternal physiological condition (lower mass gain, higher tail reserve mobilization) but has little effect on reproductive output. These effects are mainly additive to temperature regimes, with a proportional increase in maternal costs in warmer environments. Our study demonstrates the importance of considering combined effects of water and temperature when investigating organismal responses to climate changes, especially during periods crucial for species survival such as reproduction.},

keywords = {antioxidant capacity, dehydration, oxidative stress, reproduction, temperature},

pubstate = {published},

tppubtype = {article}

}

@article{bleu_reproductive_2013,

title = {Reproductive allocation strategies: a long-term study on proximate factors and temporal adjustments in a viviparous lizard},

author = {Joséfa Bleu and Jean-François Le Galliard and Patrick S Fitze and Sandrine Meylan and Jean Clobert and Manuel Massot},

url = {https://link.springer.com/article/10.1007/s00442-012-2401-1},

doi = {https://doi.org/10.1007/s00442-012-2401-1},

issn = {0029-8549},

year  = {2013},

date = {2013-01-01},

journal = {Oecologia},

volume = {171},

number = {1},

pages = {141--151},

abstract = {Optimisation of reproductive investment is crucial for Darwinian fitness, and detailed long-term studies are especially suited to unravel reproductive allocation strategies. Allocation strategies depend on the timing of resource acquisition, the timing of resource allocation, and trade-offs between different life-history traits. A distinction can be made between capital breeders that fuel reproduction with stored resources and income breeders that use recently acquired resources. In capital breeders, but not in income breeders, energy allocation may be decoupled from energy acquisition. Here, we tested the influence of extrinsic (weather conditions) and intrinsic (female characteristics) factors during energy storage, vitellogenesis and early gestation on reproductive investment, including litter mass, litter size, offspring mass and the litter size and offspring mass trade-off. We used data from a long-term study of the viviparous lizard, Lacerta (Zootoca) vivipara. In terms of extrinsic factors, rainfall during vitellogenesis was positively correlated with litter size and mass, but temperature did not affect reproductive investment. With respect to intrinsic factors, litter size and mass were positively correlated with current body size and postpartum body condition of the previous year, but negatively with parturition date of the previous year. Offspring mass was negatively correlated with litter size, and the strength of this trade-off decreased with the degree of individual variation in resource acquisition, which confirms theoretical predictions. The combined effects of past intrinsic factors and current weather conditions suggest that common lizards combine both recently acquired and stored resources to fuel reproduction. The effect of past energy store points out a trade-off between current and future reproduction.},

keywords = {cohort effects, energy stores, life history, phenotypic plasticity, reproduction, reproduction, size at birth, trade-off, trade-off, viviparity, Zootoca vivipara},

pubstate = {published},

tppubtype = {article}

}

@article{baron_intermittent_2013,

title = {Intermittent breeding and the dynamics of ressource allocation to growth, reproduction and survival},

author = {Jean-Pierre Baron and Jean-François Le Galliard and Thomas Tully and Régis Ferrière},

url = {https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2435.12023},

doi = {https://doi.org/10.1111/1365-2435.12023},

year  = {2013},

date = {2013-01-01},

journal = {Functional Ecology},

volume = {27},

number = {1},

pages = {173--183},

keywords = {life history, reproduction, reproductive effort, viper, Vipera ursini},

pubstate = {published},

tppubtype = {article}

}

@article{le_galliard_natal_2006,

title = {Natal dispersal, interactions among siblings and intrasexual competition},

author = {Jean-François Le Galliard and Gry Gundersen and Harry P Andreassen and Nils C Stenseth},

url = {https://academic.oup.com/beheco/article/17/5/733/206909},

doi = {https://doi.org/10.1093/beheco/arl002},

year  = {2006},

date = {2006-01-01},

journal = {Behavioral Ecology},

volume = {17},

number = {5},

pages = {733--740},

keywords = {competition, dispersal, inbreeding avoidance, infanticide, kin cooperation, reproduction},

pubstate = {published},

tppubtype = {article}

}