Supplementary Material

Fig. S1. Visual representation of the different MOTUs identified in silico for the species of interest. MOTU1 is always the most abundant MOTU.

Fig. S2. Taxonomic characterisation of the 130 ASVs obtained in the study. A: Abundance of sequences in situ. Relative abundance of reads at different taxonomic levels: Phylum (B), Class within Mollusca (C), Order within Bivalvia (D). The level of interest is always represented in orange in the figures and the corresponding text in bold in the legends.

Fig. S3. Comparison of the proportion of the haplotypes detected in clam tissues and water ADNe in the 12 aquariums where clams were present. The haplotypes are identified by a colour gradient: R. decussatus in green and R. philippinarum in red.

Table S1. Information on in silico primer conservation of the Vene01 primers for the three studied species, as well as P. rhomboides and V. corrugata.

© S. Lapègue et al., Published by EDP Sciences 2026