Table 1.
The first two principle components generated from sperm motility traits, showing original trait loadings, eigenvalues and cumulative per cent of variance explained by composite trait variables.
| trait | PC1 | PC2 |
|---|---|---|
| ALH: amplitude of lateral head displacement | −0.958 | 0.176 |
| BCF: beat cross frequency | 0.654 | −0.393 |
| LIN: linearity | 0.765 | 0.635 |
| STR: straightness | 0.816 | 0.565 |
| VAP: average path velocity | −0.621 | 0.766 |
| VCL: curvilinear velocity | −0.734 | 0.619 |
| VSL: straight-line velocity | 0.466 | 0.878 |
| eigenvalue | 3.738 | 2.650 |
| cumulative per cent of variance explained | 53.400 | 91.251 |