Fig. 4.

Neuromast number differs between individuals, populations and habitats. (A) Individual fish are represented by single points and are organized by population on the x-axis (see Fig. 1 for population abbreviations). Habitat is indicated by symbol: white circle=marine, green triangle=stream, yellow square=solitary lake, blue diamonds=limnetic lake, orange diamonds=benthic lake. (B) Mean Principal Component scores differ between marine (white), stream (green) and lake (yellow) habitats. The lake category includes solitary, benthic and limnetic lake populations. Error bars indicate ± s.d. Asterisks indicate significant differences (***P<0.001, **P<0.01).