For all three study species, there was no distinct population genetic structure detected, and mean pairwise genetic differentiation was generally low (FST ≤ 0.05), although highest for the least mobile species G. rufus.
S. myoti populations showed low pairwise differentiation (mean ΦST = 0.012; Table 3a), and only Satigny was significantly differentiated from two other populations (Meiringen, Agliè).
The mean pairwise estimates of genetic differentiation between Central America and the four population clusters in Amazonia were high (FST = 0.2161 – 0.3625) (Table 3).
A linear regression between patch areas (expressed as log km) and different genetic indices of differentiation (mean pairwise D EST and mean pairwise F ST ) and diversity (allelic richness A R and expected heterozygosity H E ) for each SL were also performed to assess the effect of confinement within small enclosed protected areas (details for each SL are displayed in Table 1).
The level of population differentiation (as measured by mean pairwise NST's) increased both towards the north and the south of the island, leading to a significant Mantel test (P < 0.001).
The overall differentiation of each population was estimated as the mean pairwise FST between each population and all others.
Similarly, genetic differentiation measured by Fst value based on overall mean pairwise genetic distances was higher at exon 2 putative ABS amino acid sites (Fst = 0.097; p<0.01) than at neutrally evolving intron 1 (Fst = 0.021; p<0.01) or synonymous exon 2 alleles (Fst = 0.021; p<0.021.
We used Fstat v2.9.3.2 [ 48] to test whether the observed population structure could be attributed to differences in dispersal between sexes and used four statistics: differentiation among populations (FST), mean assignment indices (mAIc), the variance in assignment indices (vAIc), and mean pairwise relatedness (mPr) [ 48, 59, 60].
<C> indicates mean pairwise correlation, <C′> indicates new mean pairwise calculation.
Disparity estimates for major archosaur groups and time intervals (weighted mean pairwise dissimilarity (WMPD)).
