Supplementary material 2 from: Dou H, Wang M, Yin X, Feng L, Yang H (2023) Can the Eurasian otter (Lutra lutra) be used as an effective sampler of fish diversity? Using molecular assessment of otter diet to survey fish communities. Metabarcoding and Metagenomics 7: e96733. https://doi.org/10.3897/mbmg.7.96733