UV chroma Brightness Carotenoid chroma
Intercept coef. = 139.50 ± 10.26 coef. = 21210 ± 2237 coef. = 615.20 ± 34.01
Within-nest effect of body mass
coef. = 0.55 ± 0.41 F1,205.99= 1.76 P = 0.18 coef. = 493.90 ± 111.30 F1,1410.24 = 22.74 P < 0.001 coef. = 2.60 ± 1.84 F1,1161.01 = 1.98 P = 0.16
Among-nest effect of body mass
coef. = 2.72 ± 0.95 F1,223.29 = 8.29 P = 0.0044 coef. = 450 ± 205.90 F1,227.51 = 5.05 P = 0.026 coef. = -1.45 ± 3.13 F1,225.43 = 0.22 P = 0.64
Year (2017) coef. = 11.67 ± 1.09 F2,220.78 = 57.57 P < 0.001 coef. = 3282 ± 236.10 F1,222.38 = 98.07 P < 0.001 coef. = -14.69 ± 3.59 F1,218.77 = 8.99 P < 0.001
Nestling sex (Males) coef. = -2.31 ± 0.22 F1,1579.93 = 106.98 P < 0.001 coef. = 352.30 ± 71.88 F1,1627.15 = 23.34 P < 0.001 coef. = 10.24 ± 1.20 F1,1642.67 = 73.39 P < 0.001
Brood size
coef. = 0.70 ± 0.38 F1,231.04 = 3.39 P = 0.067 coef. = 6.96 ± 83.51 F1,240.12 = 0.009 P = 0.92 coef. = -0.31 ± 1.27 F1,237.84 = 0.059 P = 0.81
Year * Nestling sex
coef. = -0.87 ± 0.30 F2,1553.22 = 5.10 P = 0.0062 coef. = 321.80 ± 94.4 F1,1622.30 = 6.23 P = 0.0020