“…However, various factors can bring about genetic differentiation, such as habitat shifts (ecotones) and oceanic currents (Blanco‐Gonzalez, Knutsen, & Jorde, 2016; Galarza et al., 2009; Nielsen, Nielsen, Meldrup, & Hansen, 2004; Vera et al., 2016a), and natural selection in response to environmental variation (Milano et al., 2014; Vandamme et al., 2014; Vilas, Bouza, Vera, Millán, & Martínez, 2010; Vilas et al., 2015). Distinguishing between neutral and adaptive genetic variation has become a central issue in evolutionary biology, allowing for understanding of population structure in both historical/demographic and adaptive terms (Bernatchez, 2016; Nielsen, Hemmer‐Hansen, Larsen, & Bekkevold, 2009), thereby providing essential information for the conservation and management of wild populations.…”