Table 1 Parameter estimates for the best-fitting Fabric and global trend models

From: Evolution of sexual size dimorphism in tetrapods is driven by varying patterns of sex-specific selection on size

Clade

Sex

Number of directional shifts (% of total branches in tree)

Number of evolvability shifts

Global trend (95% HPD)

Brownian variance (95% HPD)

Root state estimate (95% HPD)

Inferred ancestral SSD

Mammals

Female

299 (9.2%)

149

1.009 (1.001–1.017)

0.024 (0.013–0.044)

168.5 (18.5–701.1)

−0.065

Male

302 (9.3%)

148

1.007 (0.999–1.011)

0.019 (0.009–0.025)

179.9 (17.7–729.6)

Birds

Female

571 (7.0%)

324

1.005 (1.002–1.007)

0.007 (0.005–0.008)

302 (80.3–584.2)

0.262

Male

581 (7.1%)

304

1.006 (1.001–1.009)

0.008 (0.005–0.009)

232.4 (48.7–510.4)

Squamates

Female

530 (8.5%)

232

1.002 (1.001–1.003)

0.007 (0.004–0.008)

5.1 (1.6–11.7)

0.101

Male

547 (8.7%)

250

1.003 (1.001–1.004)

0.009 (0.006–0.010)

4.6 (1.5–10.2)

Amphibians

Female

470 (9.9%)

186

1.003 (0.997–1.005)

0.019 (0.012–0.021)

8 (1.5–31.7)

0.175

Male

474 (10.0%)

227

1.003 (0.999–1.005)

0.015 (0.011–0.019)

6.7 (1.3–22.7)

  1. The numbers of directional and evolvability shifts are taken as the numbers of shifts identified as significant in all four runs of BayesTraits. The median and highest posterior density (HPD) for the global trend parameter is represented as the inferred fold-change over the history of each clade from their respective common ancestor. Ancestral state estimates of body size in grams (median and HPD) for the root are shown, along with the inferred degree of SSD based on the ancestral state estimates.
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