highly significantp < .00001
Large and highly significant pairwise matrilineal differentiation was found among adult sharks from the GAL, SEY, and FLA ( F ST = 0.529–0.738, Φ ST = 0.781–0.953, p < .00001; Table 2 ), along with strong phylogeographic structure and no haplotype sharing among sampling sites (Figure 4a ).