Table 3.
Probability for a predominant facultative symbiont to infect an individual host as a function of its sex and of the study site
| Variable | Deviance | df | P |
|---|---|---|---|
|
Rickettsia (C. venosus) |
|||
| Site |
0.31589 |
1 |
0.57409 |
| Sex |
0.66578 |
1 |
0.41453 |
| Site:Sex |
2.75129 |
1 |
0.09718 |
|
Wolbachia A (C. glandium) |
|
|
|
| Site |
0.0003 |
1 |
0.98704 |
| Sex |
1.746 |
1 |
0.18635 |
| Site:Sex |
8.9503 |
1 |
0.00277 |
|
Wolbachia B (C.pellitus) |
|
|
|
| Site |
1.9356 |
1 |
0.16415 |
| Sex |
0.0747 |
1 |
0.78467 |
| Site:Sex | 3.7132 | 1 | 0.05398 |
Each analysis was performed on the weevil species shown in brackets. For each bacterium, the best-fitted generalized linear model (logistic regression) is shown, and was selected on the basis of the Akaike Information Criterion (AIC =117.2 for Rickettsia, 42.48 for Wolbachia A and 22.88 for Wolbachia B).The P-values for respective explanatory variables were obtained with chi-square statistics.