Table 2.
Model-based analysis of diversification rates in parrotfishes shows that the two-rate model explains the data best. MRCA of Scarus and Chlorurus is found as the ML estimate of the location of the rate shift. ΔAIC denotes the difference between the AIC score of a model and the overall best-fitting model. rR and rNR are the diversification rates of the tree partition that does and does not include the root, respectively. Diversification rates are estimated with a method that combines taxonomic and phylogenetic data (Rabosky et al. 2007).
| constant-rate log L (ΔAIC) |
two-rate log L (ΔAIC) |
rate-decrease log L (ΔAIC) |
||||
|---|---|---|---|---|---|---|
| model | NPRS | BEAST | NPRS | BEAST | NPRS | BEAST |
| ε = 0 | −62.8 (26.3) | −59.4 (19.7) | −47.7 (0) | −47.6 (0) | −56.8 (18.3) | −54.1 (13.1) |
| parameters | rR = 0.193 | rR = 0.171 | rR = 0.093; rNR = 0.4 | rR = 0.088; rNR = 0.324 | rR = 0.254; rNR = 0.1 | rR = 0.224; rNR = 0.092 |
| ε = 0.9 | −59.1 (13.5) | −58.0 (11.0) | −50.4 (0) | −50.5 (0) | −53.7 (6.6) | −53.3 (5.7) |
| parameters | rR = 0.062 | rR = 0.054 | rR = 0.018; rNR = 0.168 | rR = 0.017; rNR = 0.134 | rR = 0.074; rNR = 0.001 | rR = 0.063; rNR = 0.001 |