Skip to main content

Advertisement

Springer Nature is making Coronavirus research free. View research | View latest news | Sign up for updates

Table 3 Summary results for principal components analysis of external measurements of Gyps indicus and G. tenuirostris.

From: Systematics within Gyps vultures: a clade at risk

Factor component loadings
Variable 1 2 3 4 5 6
Culmen l 0.75 -0.21 0.22 0.45 0.00 -0.20
Bill w -0.38 0.56 0.41 0.35 0.20 -0.17
Maxilla d -0.17 0.49 0.28 0.48 0.28 0.23
Nares l -0.80 0.29 0.06 0.04 0.34 -0.01
Gape w -0.01 0.30 0.07 0.66 -0.01 0.12
Bill l from gape 0.79 0.15 -0.08 0.34 -0.20 0.01
Mandibular symphysis l 0.74 0.33 0.32 0.11 0.13 0.10
Tail l 0.01 -0.07 -0.69 -0.47 0.18 0.25
Outer rectrix l -0.29 -0.29 0.80 0.12 -0.18 0.20
Alula l 0.72 0.19 0.06 -0.17 -0.04 0.35
Tarsus l 0.72 0.25 -0.12 -0.24 0.11 0.22
Tarsus proximal b 0.60 -0.02 0.57 -0.03 0.12 -0.40
Tarsus minimum b 0.33 -0.12 0.42 -0.41 0.01 0.28
Tarsus distal b 0.63 -0.30 0.09 0.15 -0.30 -0.45
Pes digit I l 0.64 0.42 -0.11 -0.17 0.28 0.02
Pes digit I claw l -0.04 -0.71 0.01 -0.09 0.61 0.09
Pes digit II l 0.56 0.41 -0.11 -0.38 0.37 -0.36
Pes digit II claw l 0.15 -0.47 -0.24 0.51 0.21 0.51
Pes digit III claw w -0.36 -0.15 0.02 0.18 0.62 -0.32
Pes digit III claw d 0.71 -0.46 0.20 0.22 -0.07 -0.08
Pes digit IV l 0.75 0.28 -0.26 0.09 0.11 0.22
Pes digit IV claw l 0.53 -0.43 -0.21 0.09 0.49 -0.03
Summary statistics
Eigenvalues 6.78 2.76 2.30 2.17 1.76 1.43
Percent variance explained 30.81 12.53 10.46 9.87 8.00 6.48
P *** ns ns ns ns ns
  1. Significance levels (ns, P > 0.05; ***, P ≤ 0.001) from two-sample t-test between component loadings for indicus and tenuirostris. Abbreviations for variables are as in Table 3.