F I G U R E 2 in Fish as predators and prey: DNA-based assessment of their role in food webs

F I G U R E 2 Schematic overview of different types of primers: species-specific (red), group-specific (green), general (blue) and blocking (yellow) primers in a hypothetical food chain and corresponding DNA sequences of involved taxa. Dots in the sequence alignment denote identical bases as in the topmost sequence