Fig. 3

STR content in freshwater fish, saltwater fish, and codfish. a. The boxplots show the variation in STR proportions ("% STRs") across the taxonomic orders included in this study. b. The boxplots show the genomic proportion of STRs in fish genomes ("% STRs") grouped by saltwater and freshwater. The significance of the difference in the genomic proportion of STRs between freshwater fish and saltwater fish in PGLS regressions are shown above the boxplots. The boxplots to the right show the results when ovalentarian fish were removed (see Fig. 1). c. The STR content in Gadiformes (codfish). The phylogenetic tree to the left includes the 101 species from Fig. 1 and is shown with Gadiformes highlighted. The phylogenetic tree to the right show additional codfish species (a subset of the phylogenetic tree from Malmstrøm et al. [41]). The coloring, ranging from blue to yellow, are scaled with the genomic proportion of STRs ("% STRs"), and capped at 7% for clarity