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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 × 104 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