Filter-feeding molluscan shellfish (oysters, mussels, clams, and so forth) are grown in areas classified for sanitary quality under EU Regulation 854/2004 on the basis of Escherichia coli monitoring. Rationalizing monitoring programs through use of a single-indicator shellfish species, rather than monitoring several species, has the benefit of reducing cost. To protect public health, the indicator must show an equivalent or higher level of contamination than the species it represents. This study, using a well-established statistical method (Bland-Altman method comparison) on routine monitoring data, demonstrates that the contamination ratio between species at the same site may change across the range of contamination levels. Nevertheless, an accumulation ordering was established as follows: The common cockle Cerastoderma edule, Tapes philippinarum (Manila clam), and Mytilus spp. (mussels) are broadly equivalent, and each shows a greater level of accumulation than the oysters Crassostrea gigas (Pacific oyster) and Ostrea edulis (native oyster), which both accumulate to a similar extent. Last, Ostrea edulis shows a greater level of accumulation than Mercenaria mercenaria (American hard clam). The data suggest that the use of Mytilus spp. may alone provide an adequate index of fecal pollution impacting the growing areas in England and Wales.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 32 • No. 2