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Fig. 5 | Frontiers in Zoology

Fig. 5

From: Physiological predictors of reproductive performance in the European Starling (Sturnus vulgaris)

Fig. 5

Few associations between physiological summary variables (PCA axes) and reproductive performance. We performed regression models to evaluate the effect of the first three axes of the PCAs on all centered and reduced physiological variables (PCA directional, n = 80), on the logarithm of their absolute values (PCA deviational, n = 80; see Additional file 1: Figure S7), and the first axis of PCAs on functional groups of physiological variables (n = 133, 92, and 122 respectively for metabolism/energy, aerobic capacity, and oxidative stress functional groups; see Additional file 1: Figure S8), on each performance measure, using observations during the incubation stage (upper panel), the chick-rearing stage (middle panel), or the mean of all available observations within a year (lower panel). Height of the horizontal line in the box represents the effect size and the color underneath is blue for positive effects and red for negative ones, with color hue illustrative of p-values (darker shades for lowest p-values). Non-significant coefficients are marked with an “X”

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