Fig. 2

Carbonate content-related parameters in three Chiton granosus populations across the biogeographical break in central north Chile. (a) Simple linear regressions (lines) of length and condition index (CI: dry biomass/ shell mass × 100). (b) Boxplots illustrating the range of CI values in the three populations (min to max). Asterisks indicate significant differences according to a Kruskall-Wallis and Dunn´s multiple comparison test (p < 0.001). (c) Simple linear regressions (lines) of length and shell carbonate content. (d) Simple linear regressions (lines) of length and Ash Free Dry Weight (AFDW). In panels (a), (c), and (d), the axes were Log₁₀ transformed, with each dot representing one organism, and the linear regressions were calculated on the Log₁₀ transformed data. Data from the different sites are represented as follows: white for Los Molles (LM), black for Talcaruca (T), and grey for Huasco (H).