Fig. 5

Phylogenetic path analyses of competing evolutionary theories of sex determination. a The four hypothesised scenarios (see Methods) were fitted using phylogenetic path analyses. b Histograms indicate the weight of each hypothesis, significance threshold, within 2 CICc, is indicated with a line. Bar labels are P values, significance indicates rejection of the model. N = 213 (full dataset). c Diagram summarizing the weighted graph obtained after the average of hypotheses A, D and B. Arrows indicate the hierarchical relationship across variables; the primary association is at the top of the diagram, whereas succeeding dependent variables are indicated by the direction of the arrows. Values of the relationships resulting from the phylogenetic path analyses are indicated next to the arrows. Significance of the association is indicated by the width of the arrows. d-f Similar to a-c) but for hypotheses including the averaged life history index. N = 190