Fig. 1

Unique sequence reads recorded from sequencing with vertebrate 12S (black) or elasmobranch COI (grey) primers. A Total number of unique sequence reads generated from each gene and the relative proportions identifiable to sequences from GenBank (‘Assigned’), from which they are segregated into the categories ‘Metazoa’, ‘Actinopterygii’ and ‘Chondrichthyes’. B Total number of Chondrichthyes MOTUs and named species units detected for each marker