Abstract
On different shores of Aldabra Atoll, Indian Ocean, the intertidal gastropod N. polita L. is mostly active during nocturnal low tide and digs into the sand during high tide and diurnal low tide. The species shows a plasticity in both temporal (exploitation of the emergence time during nocturnal low tide) and spatial (short-term movements) components of its activity. Snails inhabiting different shores are behaviorally adapted to the actual morphology of the coast and its exposure to wave action.

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