| 373 nm UV |
---|
Intensity | axr | axb | med rb
| αN
| rN
|
---|
8·1015 qu/s m2
| 47 | 50 | 0.76 | 89°–269° | 0.50* |
0.8·1015 qu/s m2
| 11 | 8 | 0.95 | 8° | 0.96*** |
- axr, axb, percentage of axial recordings and axial mean vectors of birds, respectively (both as defined in text); med rb, median vector length of the individual birds, representing the intraindividual variance; αN, rN, grand mean vector or axis (non-significant data in parentheses), with asterisks at rN indicating significance by the Rayleigh test, see Table 1