Table 1.
Analysis of covariance tables with latitude or average highest temperature of the warmest month (AHT_warmest) as continuous variable and summer_active as factor (0/1). A significant interaction term indicates a lack of homogeneity of slopes for summer- and winter-active populations. In (a) and (c), statistics for the maximal survival temperature are shown; in (b) and (d), statistics for maximal reproduction temperature are shown. (a) and (b) use AHT_warmest as covariable, (c) and (d) use latitude as covariable. See figure 3 for the corresponding figure.
| d.f. | mean2 | F-value | p (>F) | |
|---|---|---|---|---|
| (a) model: maxtempsurv ∼ summer_active × AHT_warmest | ||||
| summer_active | 1 | 2.5518 | 1.5989 | 0.208528 |
| AHT_warmest | 1 | 18.9125 | 11.8501 | 0.000796*** |
| summer_active : AHT_warmest | 1 | 7.3794 | 4.6237 | 0.033556* |
| residuals | 119 | 1.5960 | ||
| (b) model: maxtempfec ∼ summer_active × AHT_warmest | ||||
| summer_active | 1 | 1.6195 | 1.7308 | 0.190835 |
| AHT_warmest | 1 | 11.1837 | 11.9523 | 0.000758*** |
| summer_active : AHT_warmest | 1 | 4.6962 | 5.0189 | 0.026928* |
| residuals | 119 | 0.9357 | ||
| (c) model: maxtempsurv ∼ summer_active × latitude | ||||
| summer_active | 1 | 2.552 | 1.8039 | 0.18180 |
| latitude | 1 | 33.925 | 23.9816 | 3.09 × 10−6*** |
| summer_active : latitude | 1 | 13.946 | 9.8583 | 0.00213** |
| residuals | 119 | 1.415 | ||
| (d) model: maxtempfec ∼ summer_active × Latitude | ||||
| summer_active | 1 | 1.6195 | 2.0762 | 0.152239 |
| latitude | 1 | 22.9662 | 29.4423 | 3.08 × 10−7*** |
| summer_active : latitude | 1 | 11.4362 | 14.6610 | 0.000207*** |
| residuals | 119 | 0.7800 | ||
Significance codes: ***p < 0.001, **p < 0.01, *p < 0.05.