Figure 1.

(a) Number of burrows within amphipod domiciles of different infestation stages (see drawings on top of the figure and electronic supplementary material, figure S1) in stipes of L. berteroana from Playa Blanca collected in 2011 and 2014. (b) Number of individuals of S. lessoniophila and Bircenna sp. in domiciles (including single burrows and conglomerates) of different infestation stages in stipes of L. berteroana. Data from the sampling years 2011 and 2014 were combined because the pattern was similar in both years. The dot with a number above it represents an outlier at 117 individuals per domicile, which lies outside the scale of the ordinate.