Sewage-derived bacteria monitored in a marine water column by means of captive mussels |
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| Authors: | D R Trollope S B S Al-salihi |
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| Institution: | Department of Botany and Microbiology, University College of Swansea, Singleton Park, Swansea, SA2 8PP, Wales, Great Britain |
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| Abstract: | Batches of mussels, Mytilus edulis, obtained from a sewage-free shore were introduced into the water column at a sewage polluted site and the changed content (Escherichia coli, faecal streptococci) was assessed after immersion periods of 2 to 40 h. Rapid bacterial uptake was demonstrated; changes were analysed with respect to immersion period, revealing that 2h was satisfactory. The numbers of bacteria varied with height in the water column; mussels from the sea bed contained higher numbers of E. coli than mussels immersed just below the surface except for mussels withdrawn at, and for about 3h after, low water (LW). These observations were shown to be related to the characteristics of the e effluent and tidal systems operative at the site. |
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