Table 2.
Summary of flight data
|
P. rapae |
L. dispar |
|||
|---|---|---|---|---|
| Intact | De-winged | Intact | De-winged | |
| Speed in m/s | 2.37 ± 0.436 (N = 41) | 1.77 ± 0.363 (N = 41) | 1.57 ± 0.418 (N = 16) | 1.22 ± 0.331 (N = 11) |
| Acceleration in m/s2 | 8.48 ± 2.08 (N = 41) | 6.19 ± 1.34 (N = 41) | 8.94 ± 2.42 (N = 16) | 5.09 ± 1.13 (N = 11) |
| Normal acceleration in m/s2 | 7.64 ± 2.08 (N = 41) | 5.39 ± 1.32 (N = 41) | 8.46 ± 2.49 (N = 16) | 4.62 ± 1.22 (N = 11) |
| Normal acceleration in the horizontal plane in m/s2 | 5.18 ± 1.86 (N = 41) | 3.54 ± 1.23 (N = 41) | 5.34 ± 2.17 (N = 16) | 3.10 ± 1.05 (N = 11) |
| Radius of curvature in m | 1.17 ± 1.58 (N = 41) | 0.986 ± 1.51 (N = 41) | 0.428 ± 1.76 (N = 16) | 0.481 ± 1.47 (N = 11) |
| Wingbeat frequency in Hz | 11.8 ± 2.13 (N = 10) | 13.2 ± 1.16 (N = 10) | 26.8 ± 2.23 (N = 11) | 29.6 ± 1.57 (N = 10) |
Entries give mean ± SD, with sample size in parentheses. Differences between intact and de-winged condition, in the two species, are significant (P < 0.05) for all parameters, except for the three comparisons highlighted by bold type. Values pertaining to radius of curvature assume log-normal data.