FIGURE 2.

Habitat–genotype–phenotype relationships in mussels from different cultivation depths (1, 3, 5 and 7 m). From left to right: (a) variation in water salinity within and across culture depths; (b) relative proportions of pure and hybrid mussels of the Mytilus species complex (ME: M. edulis, MG: M. galloprovincialis, MT: M. trossulus; and putative hybrids) based on a single nuclear marker (Me15/16; Inoue et al., 1995); (c) Relative proportions of homozygous and heterozygous M. trossulus‐diagnostic alleles based on a multi‐locus SNP assay; (d) variation in shell strength (kg cm⁻¹ SL) across depth; (e) variation in mean shell shape across depth, expressed as the distribution of PC1 values and showing the average shape per depth. Data distributions are shown as violin plots overlaid with Tukey boxplots for (a) and (d)