title: Warmer temperatures attenuate the classic offspring number and reproductive investment trade-off in the common lizard, Zootoca vivipara.
abstract: Life-history traits involved in trade-offs are known to vary with environmental conditions. Here, we evaluate the response of the trade-off between 'offspring number' versus 'energy invested per offspring' to ambient temperature in 11 natural populations of the common lizard, Zootoca vivipara We provide evidence at both the intra- and interpopulation levels that the trade-off is reduced with an increase in air temperature. If this effect enhances current individual fitness, it may lead to an accelerated pace of life in warmer environments and could ultimately increase adult mortality. In the context of global warming, our results advocate the need for more studies in natural populations to explore interactions between life-history traits' trade-offs and environmental conditions.
authors.affiliation: SETE-UMR 5321, CNRS, Université Toulouse III Paul Sabatier, 2 route du CNRS, 09200 Moulis, France alexisrutschmann@gmail.com.
authors.forename: Alexis
authors.identifier: 0000-0003-2324-0472
authors.initials: A
authors.lastname: Rutschmann
authors.affiliation: SETE-UMR 5321, CNRS, Université Toulouse III Paul Sabatier, 2 route du CNRS, 09200 Moulis, France Department of Biological Sciences, Ohio University, 131 Life Sciences Building, Athens, OH 45701, USA.
authors.forename: Donald B
authors.initials: DB
authors.lastname: Miles
authors.affiliation: SETE-UMR 5321, CNRS, Université Toulouse III Paul Sabatier, 2 route du CNRS, 09200 Moulis, France.
authors.forename: Jean
authors.initials: J
authors.lastname: Clobert
authors.affiliation: SETE-UMR 5321, CNRS, Université Toulouse III Paul Sabatier, 2 route du CNRS, 09200 Moulis, France.
authors.forename: Murielle
authors.initials: M
authors.lastname: Richard
mesh_terms: D000818:Animals; D005260:Female; D008098:Litter Size; D008116:Lizards / Q000502:physiology*; D012098:Reproduction / Q000502:physiology*; D013696:Temperature; D052286:Viviparity, Nonmammalian
keywords: clutch size; female investment; life-history traits; thermal gradient; trade-off