Table 2.
Analysis of covariance of the number of egg clusters deposited on plants of Datura stramonium between ranges (native/Mexico and non-natives/Spain). The number of adults of L. daturaphila and the plant’s scopolamine concentration were the covariates. None of the interactions was significant (n = 170). The most parsimonious model (i.e., the model with the lowest AIC score) is presented. * p < 0.05.
| Term | Estimate | S.E. | t Ratio | Prob > |t| |
|---|---|---|---|---|
| Intercept | 1.3846 | 0.1494 | 9.27 | <0.0001 * |
| Range | −0.0166 | 0.0636 | −0.26 | 0.7936 |
| Adults of Lema daturaphila | 0.7426 | 0.1055 | 7.04 | <0.0001 * |
| Scopolamine | −0.2616 | 0.5653 | −2.32 | 0.0214 * |
| Effect Tests | ||||
| Source | Sum of Squares | d.f. | F Ratio | Prob > F |
| Range | 0.0456 | 1 | 0.0687 | 0.7936 |
| Adults of Lema daturaphila | 32.9161 | 1 | 49.5296 | <0.0001 * |
| Scopolamine | 3.5847 | 1 | 5.3940 | 0.0214 * |
| Error | 110.3195 | 166 | ||
| Total | 155.9339 | 169 | ||