Table 1.
Individual variation in the resilience of fertility to temperature change.
| Trait | Fixed effects (CI) | Repeatability (CI) | PSlopeVar (CI) | ||||
|---|---|---|---|---|---|---|---|
| Intercept | Slopes | Intercept | Slopes | ||||
| Theat stress | Tcold stress | Theat stress | Tcold stress | ||||
| Egg laying | 0.32 (0.18,0.49) | −1.68 (−1.90,−1.50)*** | −2.10 (−2.43,−1.80)*** | 0.27 (0.21,0.33) | 0.24 (0.17,0.32) | 0.18 (0.06,0.34) | 0.16 (0.14,0.18) |
| Egg mass | 1.43 (1.42,1.45) | 0 (−0.01,0.02) | −0.05 (−0.07,−0.03)*** | 0.62 (0.59,0.65) | 0.52 (0.48,0.57) | 0.47 (0.41,0.53) | 0.03 (0.03,0.04) |
| Number of sperm | 10.46 (10.16,10.79) | −0.67 (−1.30,−0.02)* | −0.67 (−1.13,−0.23)** | 0.23 (0.13,0.39) | 0.47 (0.13,0.84) | 0.57 ((0.24,0.79) | 0.07 (0.04,0.13) |
| Sperm viability | −1.91 (−2.19,−1.62) | 0.13 (−0.24,0.42) | −0.21 (−0.55,0.11) | 0.54 (0.35,0.74) | 0.61 (0.38,0.81) | 0.60 (0.36,0.81) | 0.1 (0.05,0.17) |
We quantified the differences between individuals relative to within and between individual variation (repeatability) for fertility at intermediate temperatures (intercept) and for the change in fertility with increasing and decreasing temperatures (slopes). Estimates and credible intervals (CI) were extracted from the second set of MCMCglmm models including individual by year slopes. See Supplementary Tables 8–11 for model details including estimates of repeatability on the expected scale and variance of fixed effects. PSlopeVar = ratio of the slope variance to the total phenotypic variance.
*pMCMC < 0.05, **pMCMC < 0.01, ***pMCMC < 0.001.