Fig. 7: Multivariate analysis of the polar lipidome of Octopus vulgaris.

a Principal component analyses (PCA), b dendrogram, and c hierarchical clustering heatmap of the top 50 lipid species sorted by analysis of variance test displaying the lowest p-values of log-transformed normalized extracted-ion chromatogram (XIC) areas of total polar lipid species identified in the arm muscle of Octopus vulgaris samples captured in three locations along the Iberian Atlantic coast (Ria Arousa—RAr, Peniche—Pe, and Santa Luzia—SL).