Ecological Speciation and the Intertidal Snail Littorina saxatilis
Figure 4
Scores for individual snails plotted on the first canonical variate using shell shape (a, c) and 15 differentiating AFLP bands (b, d) on two shores on the Yorkshire coast, separated by 40 km. The 0 point on the abscissa is chosen so that H samples are at negative distances, M at positive, with respect to 0. This was judged to be the most satisfactory way of representing a somewhat complicated sample layout dictated by the details of shore topography (see Grahame et al. [40] for details).
