Table 5.
Generalized linear mixed model of the effects of geographical and climatic factors on the body condition, weight, and SVL of red-tongued pit viper (Gloydius ussuriensis).
| Response variable | Explanatory variables | df | χ2 | Pr (> Chisq) |
|---|---|---|---|---|
| Body condition | Altitude | 1 | 10.220 | p < 0.001 |
| Land cover | 1 | 1.710 | 0.191 | |
| PC1 | 1 | 19.350 | p < 0.0001 | |
| PC2 | 1 | 0.025 | 0.872 | |
| PC3 | 1 | 6.919 | p < 0.01 | |
| Body mass (g) | Altitude | 1 | 30.577 | p < 0.0001 |
| Land cover | 1 | 0.0015 | 0.9692 | |
| PC1 | 1 | 22.844 | p < 0.0001 | |
| PC2 | 1 | 38.022 | p < 0.0001 | |
| PC3 | 1 | 13.555 | p < 0.001 | |
| SVL (cm) | Altitude | 1 | 16.342 | p < 0.0001 |
| Land cover | 1 | 0.2998 | 0.584 | |
| PC1 | 1 | 11.291 | p < 0.0001 | |
| PC2 | 1 | 26.836 | p < 0.0001 | |
| PC3 | 1 | 7.6137 | p < 0.05 |
Significant results at p < 0.05 are indicated in bold font. The survey year and month used as the random effect.