Table 2.
Predictors of great reed warbler responses to dummy presentations at their nests
| Minimal adequate model | df | F | p | Estimate (S.E.) |
|---|---|---|---|---|
| Intercept |
|
|
|
17.23 (0.88) |
| Dummy type (dove)a |
4,220.20 |
45.85 |
< 0.0001 |
gray cuckoo: 9.63 (1.21) |
| |
|
|
|
kestrel: 5.50 (1.44) |
| |
|
|
|
rufous cuckoo: 3.82 (1.26) |
| |
|
|
|
sparrowhawk: −6.61 (1.45) |
| First attacking sex (male)a |
2,161.50 |
7.85 |
0.0006 |
female: −1.69 (0.97) |
| |
|
|
|
both: 3.59 (1.04) |
| Experimental date – linear |
1,73.06 |
10.71 |
0.002 |
−0.32 (0.10) |
| Host arrival direction (focal)a |
2,173.80 |
4.23 |
0.02 |
central: −2.72 (0.93) |
| |
|
|
|
opposite: 1.33 (1.04) |
|
Removed predictors |
|
|
|
|
| Final clutch size |
1, 76.30 |
0.26 |
0.61 |
−0.70 (1.36) |
| Experimental date – quadratic | 1, 54.42 | 2.10 | 0.15 | 0.01 (0.01) |
Responses were measured as the number of contact attacks per first minute of the experiment (see Methods). Results of the general linear mixed models (GLMM).
a Reference levels of categorical variables are given in brackets.