Fig. 1

Relative distribution of diadromy in fishes. Phylogeny from Rabosky et al. [12] pruned to the family level. Horizontal lines represent the percent of freshwater (gray), marine (white), and diadromous (black) species from each family represented in the original tree. Note that percentages are based only on species used in the original phylogeny. For example, in the family Pseudaphritidae two species are recognized, one diadromous and one marine. This study only incorporates Pseudaphritis urvillii, the diadromous species, so the horizontal line for the family Pseudaphritidae is completely black despite the only 50% of the family being diadromous. Each family is represented by only one tip and placement of non-monophyletic families was chosen based on the placement of the majority of its species. Dots next to pictures represent placement of select families as a general reference. Families represented are, from top to bottom, Acipenseridae, Anguillidae, Ariidae, Salmonidae, Pleuronectidae, Mugilidae, Cottidae, Kuhliidae, Tetraodontidae. Pictures from Fishbase [54]