TABLE 3.
Annual survival of the heterogametic sex in relation to the relative sizes of the X chromosome in (A) male mammals (N estimates = 70, N species = 32), the Z chromosome in (B) female birds (N estimates = 29, N species = 15), the Y chromosome in (C) male mammals (N estimates = 56, N species = 21) and the W chromosome in (D) female birds (N estimates = 28, N species = 14).
| Fixed terms | 𝛽 | lwr CI | upr CI | |
|---|---|---|---|---|
| (A) | Intercept | 0.23 | −0.88 | 1.76 |
| X/autosome ratio slope | −0.12 | −0.42 | 0.19 | |
| Body size slope | 0.66 | 0.17 | 1.09 | |
| Dimorphism slope | 0.30 | −0.09 | 0.75 | |
| (B) | Intercept | 1.31 | 0.01 | 2.46 |
| Z/autosome ratio slope | −0.17 | −0.64 | 0.89 | |
| Body size slope | 0.31 | −0.55 | 1.30 | |
| Dimorphism slope | 0.41 | −0.62 | 0.99 | |
| (C) | Intercept | 0.65 | −0.76 | 1.83 |
| Y/autosome ratio slope | −0.53 | −0.99 | −0.08 | |
| Body size slope | 0.59 | 0.25 | 0.97 | |
| Dimorphism slope | 0.25 | −0.26 | 0.79 | |
| (D) | Intercept | 1.13 | −0.23 | 2.42 |
| W/autosome ratio slope | 0.24 | −0.93 | 1.08 | |
| Body size slope | 0.34 | −0.77 | 1.62 | |
| Dimorphism slope | 0.29 | −0.71 | 1.18 |