Table 2 Regression statistics for all the size allometry regression models with AICc weights > 4.0 × 10−6, testing for allometry of sternum size. BM = body mass, size = sternum centroid size, FP = forelimb propulsion, AF = aerial flight, BF = burst flight, SO = soar, FPD = foot-propelled swimming/diving, WPD = wing-propelled diving. N = 105 for all analyses
From: The relationship between sternum variation and mode of locomotion in birds
Models | AICc | AICc weights | R2 | Pagel’s λ | Variable | Coefficient | Std. error | t-value | p value |
|---|---|---|---|---|---|---|---|---|---|
size ~ BM + FP | − 243.9 | 0.72 | 0.91 | 0.78 | Intercept BM FP | 1.33 1.022 0.12 | 0.049 0.029 0.0201 | 27.32 35.02 6.13 | 0 0 0 |
size ~ BM * FP | − 240.6 | 0.14 | 0.91 | 0.78 | Intercept BM FP BM:FP | 1.46 0.903 − 0.013 0.13 | 0.12 0.098 0.11 0.102 | 12.70 9.18 0.12 1.26 | 0 0 0.91 0.21 |
size ~ BM + FP + BF | − 240.55 | 0.14 | 0.91 | 0.75 | Intercept BM FP BF | 1.31 1.029 0.123 0.074 | 0.048 0.029 0.020 0.039 | 27.038 35.56 6.067 1.89 | 0 0 0 0.062 |
size ~ BM + FP + AF + FPD | − 234.35 | 6.1 × 10−3 | 0.91 | 0.80 | Intercept BM FP AF FPD | 1.35 1.003 0.21 − 0.093 0.027 | 0.049 0.030 0.045 0.042 0.023 | 27.27 33.36 4.73 − 2.22 1.203 | 0 0 0 0.029 0.23 |
size ~ BM + FP + AF + BF + SO | − 229.52 | 5.4 × 10−4 | 0.90 | 0.79 | intercept BM FP AF BF SO | 1.33 1.015 0.19 − 0.075 0.072 − 0.006 | 0.052 0.032 0.043 0.042 0.039 0.023 | 25.704 31.26 4.47 − 1.79 1.84 − 0.29 | 0 0 0 0.076 0.068 0.77 |
size ~ BM + AF | − 228.58 | 3.4 × 10−4 | 0.90 | 0.75 | Intercept BM AF | 1.35 1.027 0.086 | 0.053 0.032 0.020 | 25.65 31.75 4.25 | 0 0 0 |
size ~ BM + FP + AF + FPD + WPD | − 227.35 | 1.8 × 10−4 | 0.90 | 0.80 | Intercept BM FP AF FPD WPD | 1.35 1.003 0.20 − 0.079 0.023 0.017 | 0.050 0.030 0.053 0.050 0.024 0.033 | 27.18 33.22 3.73 − 1.59 0.97 0.52 | 0 0 0.0003 0.12 0.34 0.60 |
size ~ BM + FP + AF + FPD + WPD + BF | − 224.51 | 4.4 × 10−5 | 0.90 | 0.76 | Intercept BM FP AF FPD WPD BF | 1.32 1.012 0.20 − 0.079 0.029 0.017 0.080 | 0.049 0.030 0.053 0.049 0.023 0.032 0.039 | 27.032 33.99 3.75 − 1.59 1.25 0.53 2.073 | 0 0 0.0003 0.12 0.21 0.60 0.041 |
size ~ BM + FP + AF + CF + BF + SO | − 221.14 | 8.3 × 10−6 | 0.90 | 0.78 | Intercept BM FP AF CF BF SO | 1.32 1.022 0.19 − 0.079 0.0092 0.077 − 0.0035 | 0.053 0.034 0.044 0.043 0.016 0.0401 0.024 | 25.084 29.75 4.40 − 1.84 0.56 1.92 − 0.15 | 0 0 0 0.068 0.57 0.057 0.88 |
size ~ BM | − 219.9 | 4.5 × 10−6 | 0.89 | 0.73 | Intercept BM | 1.46 0.983 | 0.049 0.0328 | 30.11 29.936 | 0 0 |