Table 2.
Principal component (PC) loadings for variables derived from a cost surface and a current density map
| Variable Descriptiona | PC1b | PC2 | PC3 | PC4 |
|---|---|---|---|---|
| Mean Cost (6 km) | −0.360 | −0.115 | 0.261 | −0.421 |
| Mean Cost (20 km) | −0.424 | −0.105 | −0.013 | 0.306 |
| Mean Cost (120 km) | −0.322 | −0.096 | −0.530 | −0.136 |
| Standard Deviation of Cost (6 km) | −0.380 | −0.044 | 0.311 | −0.341 |
| Standard Deviation of Cost (20 km) | −0.426 | −0.095 | −0.017 | 0.333 |
| Standard Deviation of Cost (120 km) | −0.332 | −0.096 | −0.527 | −0.077 |
| Mean Current (6 km) | 0.075 | 0.418 | −0.270 | 0.260 |
| Mean Current (20 km) | 0.012 | 0.474 | −0.154 | −0.250 |
| Mean Current (120 km) | −0.079 | 0.432 | −0.035 | −0.364 |
| Standard Deviation of Current (6 km) | −0.242 | 0.282 | 0.366 | 0.104 |
| Standard Deviation of Current (20 km) | −0.250 | 0.347 | 0.196 | 0.442 |
| Standard Deviation of Current (120 km) | −0.132 | 0.401 | −0.076 | −0.090 |
aNumbers in parenthesis indicate the diameter of a buffer over which estimates were calculated
bValues with bold font indicate the major contributors of the principal component