Abstract
Solen cylindraceus retains particles down to 2·5-3 μm with great efficiency. Below this particle size, retention efficiency decreases rapidly and a net production of particles is recorded below 1·5 μm. Particle retention is independent of temperature (15 °C and 25 °C) and salinity (15‰ and 35‰). Filtration rate is shown to vary minimally at the different temperature and salinity combinations tested: 19·4 ml min −1 recorded at 25 °C and 35‰, and 18·2 ml min −1 at 15 °C and 15‰. Despite being a dominant member of the estuarine macrobenthos, it is estimated that the Solen population filters only 3–4% of the tidal volume per tide and is likely to play a minor role in any resource depletion.
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