Fig. 5: Schematic representation of the likelihood of the models tested with fastsimcoal2.
The name given to each model is indicated above the schematic representation, as well the difference to maximum likelihood (dif. to max. likelihood), which is the difference in log10 units between the estimated likelihood and the maximum likelihood if there was a perfect fit to the observed site frequency spectrum. The closer to zero (less negative values), the better the fit. The estimated admixture proportion is the parameter α. Models A–C have eight parameters and therefore are directly comparable. Models D–F have nine parameters and are also directly comparable. All inferred parameters are indicated in relation to the Ne of S. carolitertii (NeC)). TA – divergence from the ancestral; TP – divergence of the northern S. pyrenaicus; TS—secondary contact. Population sizes are not to scale. See Supplementary Fig. S11 for relative likelihoods based on AIC, and Supplementary Tables S5–S7 for estimated likelihoods and parameter values.
