Figure 3

Nucleotide diversity (π) among species and lineages within species of porpoise. The median and mean π values are represented respectively by the colored line in the boxplot and the black dot. The whiskers represent the 95% confidence interval. The boxes represent the upper and lower quartile. No overlapping boxplots are significantly different. The species are represented by a pictogram on the top of the figure. The names of the distinct lineages are provided at the bottom of the plot in the black boxes. The acronyms are provided in Fig. 1 and Table 1.