Table 3.
Component matrix with the loading factors of each variable into the PCs. The factors were extracted with principal component analysis under a varimax rotation with Kaiser normalisation. Rotation converged in 7 iterations. The representative PCs are in bold. The PCs represent the following traits. PC1: body structure; PC2: head structure; PC3: limbs; PC4: GA. The value used as the cut-off was 0.47, and loading variables are in bold. * HL loaded similarly into two PCs, secondarily into PC4.
| Variable | PC1 | PC2 | PC3 | PC4 | |
|---|---|---|---|---|---|
| TL | Tail length | 0.689 | −0.140 | 0.292 | 0.144 |
| GA | Gleno-acetabular distance | 0.045 | −0.024 | −0.027 | 0.922 |
| CW | Chest width | 0.668 | −0.025 | 0.491 | −0.098 |
| FLL | Forelimb length | 0.118 | 0.086 | 0.834 | 0.059 |
| HLL | Hindlimb length | 0.224 | 0.135 | 0.774 | −0.064 |
| HL | Head length | 0.367 | 0.472 | −0.067 | −0.460 * |
| HW | Head width | 0.679 | 0.228 | 0.297 | −0.197 |
| EL | Eye length | 0.180 | 0.594 | 0.189 | −0.204 |
| IN | Inter-nostril distance | 0.569 | 0.248 | 0.053 | 0.027 |
| ON | Orbitonarial distance | 0.040 | 0.732 | 0.057 | 0.005 |
| IO | Interorbital distance | 0.685 | 0.248 | 0.016 | −0.060 |
| OR | Orbitorostral distance | 0.046 | 0.774 | 0.120 | 0.019 |
| IC | Intercanthal distance | 0.424 | 0.562 | −0.123 | −0.041 |