First-generation migrants among populations and among demes.

This table corresponds to the results of the likelihood-based Bayesian assignment test [79] performed within geneclass2 [77] allowing the detection of first-generation (F0) migrants within and between the Northeastern and Southwestern ridges. The probability computation at the 1% significance level was performed using the Monte Carlo resampling method of [78] with 10000 simulated individuals. Rows 1 to 6 correspond to recent dispersal between populations of the Northeastern ridge (6 F0 migrants) while row 7 corresponds to recent dispersal between populations of the Southwestern ridge (1 F0 migrant). Recent dispersal between both the Northeastern and Southwestern ridges is represented in rows 8 to 11 (4 F0 migrants). See Tables 1 and S1 for codes. 1membership of the local population to deme 1 (Northeastern ridge). 2membership of the local population to deme 2 (Southwestern ridge).