Table 5 Models implemented using a maximum-likelihood inference to test evolutionary models for changes in asymmetry
From: Wonky whales: the evolution of cranial asymmetry in cetaceans
Model name | State | Model type | Description |
|---|---|---|---|
‘OU-ancestral’ | Ancestral state | OU | A classic Ornstein-Ulenbeck (OU) model |
‘BM-ancestral’ | Ancestral state | BM | A classic Brownian motion (BM) model |
‘BMtr-ancestral’ | Ancestral state | BMtr | A classic BM model with an independent trend |
‘BMsm-ancestral’ | Ancestral state | BMsm | A classic BM model with no selective regime and which estimates separate phylogenetic means |
‘BMM-ancestral’, ‘BMM-regime’, ‘BMM-regime-split’, ‘BMM-echo’, BMM-echo-freq’ | Ancestral state, regime, regime-split, echolocation, echolocation-frequency | BMM | A BM model with a selective regime |
‘BMMtr-ancestral’, ‘BMMtr-regime’, ‘BMMtr-regime-split’, ‘BMMtr-echo’, BMMtr-echo-freq’ | Ancestral state, regime, regime-split, echolocation, echolocation-frequency | BMMtr | A BM model with a selective regime and an independent trend |
‘BMMsm-ancestral’, ‘BMMsm-regime’, ‘BMMsm-regime-split’, ‘BMMsm-echo’, BMMsm-echo-freq’ | Ancestral state, regime, regime-split, echolocation, echolocation-frequency | BMMsm | A BM model with a selective regime which estimates separate phylogenetic means |
‘OUM-ancestral’, ‘OUM-regime’, ‘OUM-regime-split’, ‘OUM-echo’, ‘OUM-echo-freq’ | Ancestral state, regime, regime-split, echolocation, echolocation-frequency | OUM | An OU model with a selective regime |