Figure 2

Northeast Atlantic (NEA) basking shark sampling occasions and DAPC results. (a) NEA sampling sites and numbers per year and month (2009–2014) with an orange circle emphasizing samples collected relatively early in the season, i.e. IRE_12. (b) Scatterplot from the discriminant analysis of principal components (DAPC) on NEA samples. Groups are shown as different colours and inertia ellipses, while dots represent individuals. Groups include temporally merged individuals from SCO = Scotland, IoM = Isle of Man, IRE = Ireland, and IRE_12 = Irish samples from 2012, respectively. The bottom inset is the DAPC’s ‘compoplot’, a bar plot showing the probabilities of assignment of individuals to the different, pre-defined groups (individuals are plotted along the x-axis and membership probabilities along the y-axis). Colours in ‘compoplot’ correspond to colours in the DAPC scatterplot.