4. Analysis of realistic life history data for model parameterization
To ensure our modeling represented natural patterns of reproductive life history, we used a recent life history dataset of lizards as a reference (Mesquita et al. 2016). Of the 221 species (183 oviparous and 39 viviparous species) with records of reproductive frequency (number of clutches per year), nearly half of oviparous species (84 in 183) produced more than one clutch per year. Empirical studies also suggested that oviparous lizards produced more clutches when acclimated to higher temperatures (Du et al. 2005; Lu et al. 2018). In contrast, most viviparous species in the dataset (36 in 39) produced one or even fewer than one litter per year. Thus, in our models, we assumed oviparous mothers produced more clutches when both thermal conditions and energy reserves allowed, and viviparous mothers produced a maximum of one litter per year.