(a) Relationship between the density of L. littorea in the second size class and the first (smallest, year 1) size class. Fitted relationship is a Ricker curve (r² = 67%). Each point represents the density estimate from a 30 m wide transect covering the intertidal where L. littorea were found. (b) Relationship between the densities of the largest (third year) size class and the second size class for individual transects. The line is a fitted Ricker curve (r² = 19%).