Table 2: A summary of recent studies using prey metabarcoding to assess copepod trophic interactions. The list includes the consumers studied, the dietary source of DNA extractions, total numbers of assigned 18S reads from all sources (e.g. consumer, prey, symbiont, contaminant) and prey. In addition, we report the average prey reads per sample (calculated from reported sample size and total prey reads), the 18S fragment and its putative length (bp). The use of blocking primers is listed with concentrations of blocking primer per concentration of template DNA. Putative methodological biases are listed, and we outline the conceptual requirements and suitable consumers for each approach. NA = Not Available. † = prey reads are calculated from the reported proportions of total reads. †† = unknown if reads are assigned or raw. ††† = unknown if reads are prey or all assigned.