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.