"Presence or absence of Cerastoderma edule (ITIS: 80901: WoRMS 138998) [Stage: larvae] in the water body by filtration, DNA extraction and polymerase chain reaction"@en . . "PAB07155" . "Statement of whether the specified taxon is present (boolean true) or absent (boolean false) in a sample based on detection of taxon DNA by PCR" . .