Table 1.
Descriptive data on separate mating trials with females without plugs and plugged females and statistical comparison of the mating behaviours between the two groups
| Mating trials with females | Statistical comparison | ||||
|---|---|---|---|---|---|
| Response variable | Without plug (N) | With plug (N) | Test statistics | P-value | Method/Model |
| Succesful mounting [%] | 53 (66) | 49 (85) | χ 2 1 = 0.07 | 0.78 | Proportion test |
| Time in mating position (mean ± SE) [min] | 86.2 ± 14.9 (35) | 17.2 ± 3.4 (42) | F1, 76 = 39.2 | < 0.001 | GEE-gamma |
| Number of palps used for insertion (mean ± SE) | 1.4 ± 0.1 (35) | 1.07 ± 0.08 (42) | χ 2 1 = 7.8 | 0.01 | GEE-poisson |
| Number of lateral palpal movements per min (mean ± SE) | 5.0 ± 1.2 (16) | 22.4 ± 2.7 (24) | F1, 39 = 7.5 | 0.006 | GEE-gamma |
| Number of palpal chewing movements per min (mean ± SE) | 0.6 ± 0.1 (16) | 2.0 ± 0.2 (24) | F1, 39 = 5.1 | 0.024 | GEE-gamma |
| Presence of long haematodochal expansions [%] | 100 (16) | 8.3 (24) | χ 2 1 = 3774 | < 0.001 | GEE-binomial |
| Copulation terminated by male [%] | 2.9 (35) | 52 (42) | χ 2 1 = 7.9 | 0.004 | GEE-binomial |