Univariate results of the percentage of variance explained (R²) by each predictor variable in the three PCA axes.

<p>Univariate results of the percentage of variance explained (R²) by each predictor variable in the three PCA axes.</p

Antimicrobial activity rate.

<p>Variation in the number of symbiotic colonies isolated from hoopoe’s uropygial gland secretion that presented antagonistic activity against indicator bacteria.</p

Intensity of antimicrobial activity.

<p>Variation in the inhibitory intensity against each indicator strain by symbiotic bacteria isolated from the uropygial gland secretion of hoopoes. (SA: <i>S. aureus</i>; ML: <i>M. luteus</i>; LM: <i>L. monocytogenes</i>; LL: <i>L. lactis</i>; LI: <i>L. innocua</i>; BL: <i>B. licheniformis</i>; EF: <i>E. faecium</i>; S47: <i>E. faecalis</i>). Intensity of antagonistic activity: 0 (no halo), 1 (ring width <1 mm), 2 (ring width = 1–2 mm), 3 (ring width = 3–4 mm), and 4 (ring width >4 mm.).</p