Illumina next generation ddRAD sequencing SNP data from: Contrasting genetic diversity and structure between endemic and widespread damselfishes are related to differing adaptive strategies

Aim: Discerning when, where, and how processes of isolation lead to differing biogeography is especially complex for marine species with similar ecological niches and within the same geographic location. We assessed population genetics of congeneric and ecologically similar damselfishes within their overlapping distributions and across potential barriers to geneflow.
 
Taxon: Dascyllus marginatus (endemic) and Dascyllus abudafur (widespread).
 
Location: Coral reefs from the Red Sea, Djibouti, Yemen, Oman, and Madagascar. 
 
Methods: We used RADseq derived SNPs to investigate key differences in population genetics between both species and discuss barriers shaping genetic differentiation (neutral vs. selective) and biogeography. 
 
Results: Dascyllus marginatus inhabited the Red Sea, the coasts of Yemen (including Socotra), and the Gulf of Oman. Dascyllus abudafur species was present from the Red Sea to Madagascar but was absent from Yemen and Oman. Populations of D. marginatus had an or...