In terms of the fishing vessel scavenging by sharks, the effects are two-fold.
"On the downside, being caught by fishing nets increases the mortality rate on sharks, decreasing their population size," Dunn said. "But on the plus side, the increased opportunities for scavenging provided by fishing may benefit the growth and reproduction of the sharks, increasing their population size."
"At the moment, we don't know what the net effect is," he added.
"The extension of bar-coding to the identification of semi-digested prey items in the stomachs of predators was always seen as an important potential for this style of identification tool," Robert Ward, a scientist who helped to develop BOLD, told Discovery News.
"This is one of the first studies, to my knowledge, which has made use of the Barcode of Life Database for this particular purpose," Ward added, "and the successes detailed in the paper are very interesting and encouraging."
John Gordon, an honorary research fellow at the Scottish Marine Institute, told Discovery News that he too believes the new paper "opens up yet another tool for a more comprehensive analysis of fish stomach contents."