Data from: Selection and sex-biased dispersal in a coastal shark: the influence of philopatry on adaptive variation

Sex-biased dispersal is expected to homogenize nuclear genetic variation
relative to variation in genetic material inherited through the
philopatric sex. When site fidelity occurs across a heterogeneous
environment, local selective regimes may alter this pattern. We assessed
spatial patterns of variation in nuclear-encoded, single nucleotide
polymorphisms (SNPs) and sequences of the mitochondrial control region in
bonnethead sharks (Sphyrna tiburo), a species thought to exhibit female
philopatry, collected from summer habitats used for gestation. Geographic
patterns of mtDNA haplotypes and putatively neutral SNPs confirmed female
philopatry and male-mediated gene flow along the northeastern coast of the
Gulf of Mexico. A total of 30 outlier SNP loci were identified; alleles at
over half of these loci exhibited signatures of latitude-associated
selection. Our results indicate that in species with sex-biased dispersal,
philopatry can facilitate sorting of locally adaptive variation, with the
dispersing sex facilitating movement of potentially adaptive variation
among locations and environments.