Investigation of mechanisms underlying chaotic genetic patchiness in the intertidal marbled crab Pachygrapsus marmoratus (Brachyura: Grapsidae) across the Ligurian Sea

摘要

a, map of the study sites (modified from https://commons.wikimedia.org/wiki/File:Map_of_Italy-it.svg with Inkscape v0.92). Pachygrapsus marmoratus individuals were sampled for genetic analyses at four sites of the Ligurian Sea: Porto Mediceo (PM), Secche della Meloria (SM), Riomaggiore (RM), Le Grazie (LG). b, LIME-ROMS monthly mean of the surface horizontal velocity, vertically averaged in the first 20 m of depth (modified from Sciascia et al. [55] with Inkscape v0.92). The three main areas of the Ligurian basin are also shown (central zone, frontal zone, peripheral zone)