Criterion used to define the distribution map portfolio for octopus in Mauritanian waters for the hot (left) and the cold (right) season. The inset panels represent the percentage of variance explained when including progressively more and more EOMs. The threshold of 60% was used for selecting the candidate EOMs for building the portfolio. The main graph shows the position of EOMS with respect to their relationship with octopus abundance. The x-axis corresponds to the correlation between EOM weights and abundance (the closer to +/− 1, the better). The y-axis represents the relative values of the slopes of the cross-correlograms between each EOM weights and abundance, with respect to the maximum possible value (the closer to +/− 1, the better). The size of EOF numbers is inversely proportional to the percentages of nugget effect in the auto-correlograms of the EOMs' weights (the larger the better). The EOMs that allow recovering 60% of the input variance are indicated in red and connected for better visibility.