Table 3.
Character loadings and eigenvalues for Principal Components (PC) Analysis. The analysis was based on ten size-corrected morphometric variables measured in Amazonian, Chocoan and Panamanian populations of the Rhinella margaritifera species group. Abbreviations are: TL = Tibia Length; FL = Femur Length; HL = Head Length; HW = Head Width; STCH = Supratympanic Crest Height; SOCH = Supraorbital Crest Height; NSD = Nostril-Snout Distance; IND = Inter-Nostril Distance; TD = Tympanum Diameter; FT = Foot Length. Bold figures indicate highest loadings.
| Variable | PCA Females | PCA Males | ||||
|---|---|---|---|---|---|---|
| PC I | PC II | PC III | PC I | PC II | PC III | |
| FL | 0.330 | 0.165 | 0.167 | 0.272 | 0.159 | 0.322 |
| FT | 0.334 | 0.214 | 0.418 | 0.061 | -0.038 | 0.661 |
| HL | 0.350 | -0.065 | 0.153 | 0.448 | -0.268 | -0.078 |
| HW | 0.343 | 0.132 | -0.288 | 0.446 | -0.222 | -0.045 |
| IND | -0.203 | 0.381 | 0.512 | 0.280 | 0.502 | -0.142 |
| NSD | 0.217 | 0.155 | -0.580 | 0.262 | 0.386 | -0.186 |
| SOCH | 0.368 | -0.067 | 0.190 | 0.423 | -0.071 | -0.082 |
| STCH | 0.411 | -0.154 | -0.039 | 0.409 | -0.290 | -0.045 |
| TD | 0.071 | 0.817 | -0.159 | 0.099 | 0.557 | -0.128 |
| TL | 0.368 | -0.200 | 0.232 | 0.134 | 0.228 | 0.610 |
| Eigenvalue | 4.411 | 1.192 | 1.128 | 2.800 | 1.947 | 1.585 |
| Cumulative variance (%) | 44.11 | 56.03 | 67.31 | 28.00 | 47.47 | 63.32 |