Fig. 1From: The influence of season and the tidal cycle on division of labour by the radula during feeding in the estuarine brooding gastropod Crepipatella dilatata (Calyptraeidae)Crepipatella dilatata. Mean values (± SD) for environmental variables [Salinity, no units; TPM total particulate matter (mg L−1); POM particulate organic matter (mg L−1)] in the water column during tidal cycles in the Quempillén estuary at different times of the year. a Summer (January); b autumn (May); c winter (August); d spring (November)Back to article page