Figure 4

PCoA analysis using the genetic distances between all population pairs. The first and second axes explain 75.81 and 2.28% of the variability, respectively. Three main groups of population can be distinguished: Gulf of Cadiz, Alboran Sea and the remaining populations. Each population is indicated by an initial and a different colour and followed by the year (CADI: C, dark blue; WALB: W, light blue; EALB: E, light green; ALAC: A red; VALE: V, light brown; DELT: D, dark brown; NCAT: N, black).