Table 1.
The effect of UV reflectance and chemical cues on agonistic behaviours of N. oerstedii intruders. Generalized linear models for each variable were assessed using Wald χ2-tests, except where noted. Each interaction was tested using a fully saturated model, and non-significant interaction terms were removed when testing main effects.
| variable | model terms | χ2 | d.f. | p-value |
|---|---|---|---|---|
| latency until approach | interaction | 2.92 | 1 | 0.087 |
| UV | 0.23 | 1 | 0.635 | |
| chemical cues | <0.001 | 1 | 0.990 | |
| speed of approach | interaction | 0.06 | 1 | 0.803 |
| UV | 0.28 | 1 | 0.596 | |
| chemical cues | 4.61 | 1 | 0.032* | |
| duration of fight | interaction | 1.68 | 1 | 0.195 |
| UV | 3.35 | 1 | 0.067 | |
| chemical cues | 0.01 | 1 | 0.928 | |
| offensive behaviours | interaction | 0.96 | 1 | 0.326 |
| UV | 17.08 | 1 | <0.001* | |
| chemical cues | 6.34 | 1 | 0.012* | |
| defensive behavioursa | interaction | 4.32 | 2 | 0.115 |
| UV | 0.29 | 2 | 0.862 | |
| chemical cues | 2.13 | 2 | 0.345 | |
| antennal flicks | interaction | 2.13 | 1 | 0.145 |
| UV | 0.77 | 1 | 0.380 | |
| chemical cues | 0.07 | 1 | 0.784 | |
| proximity to burrow | interaction | 1.96 | 1 | 0.161 |
| UV | 0.49 | 1 | 0.482 | |
| chemical cues | 0.70 | 1 | 0.403 | |
| winner of fight | interaction | 3.47 | 1 | 0.062 |
| UV | 0.48 | 1 | 0.489 | |
| chemical cues | 2.07 | 1 | 0.150 |
*p < 0.05.
aModel terms were assessed using likelihood ratio tests.