Table 3 Estimated components of the GAMs for the relationships between the probability of infection by trematode larvae and snail size and sampling month, with corresponding effective degrees of freedom (edf), Chi-square statistic, P-values, and percentage of deviance explained by the models (%DE)
Smoothing effect(s) variable | Probability of infection | |||||||
|---|---|---|---|---|---|---|---|---|
C. daubneyi | F. hepatica | |||||||
edf | χ 2 | P | %DE | edf | χ 2 | P | %DE | |
Snail size | 1.0 | 4.6 | 0.035 | 19.0 | 1.0 | 3.6 | 0.058 | 12.8 |
Sampling month | 6.8 | 92.8 | < 0.001 | 5.4 | 49.9 | < 0.001 | ||