Additional file 7 of Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus)

Additional file 7 Figure S4. Principal components analysis (PCA) plots showing both relative gene expression (for growth and skeletal-related genes) and ventral craniofacial shape variation attributed to family in the brown Arctic charr morph from lake Vatnshlíðarvatn at hatching (H) and first feeding (FF). a) H with offspring size; b) H without offspring size; c) FF with offspring size; and d) FF without offspring size. Coloured shapes and associated standard error bars correspond to mean shape of offspring within a family. For gene expression only, green and red arrows show the top three genes (listed from highest to lowest) with the highest PCA loadings driving divergence towards the positive (green) and negative (red) extremes of the PC axes. Deformation grids at the extremes of both axes represent the amount of shape change, with two-fold magnification.