Abstract

MORSE, Aaron P  and  PETERS, Winfried S. Opportunistic suspension feeding in the intertidal gastropod Olivella columellaris and its implications for the regulation of tidal migrations.Translated byChristine Harris. Cienc. mar [online]. 2016, vol.42, n.4, pp.289-294. ISSN 0185-3880.  https://doi.org/10.7773/cm.v42i4.2640.

The gastropod Olivella columellaris inhabits sandy beaches of the Tropical East Pacific. These snails perform tidal migrations for continuous suspension feeding in the moving backwash zone, possibly controlled by an endogenous circatidal clock. However, O. columellaris readily modifies its circatidal behavior, for example when flow channels develop below natural and artificial tide pools at ebb tide. Suspension feeding continues in such channels while water is running, delaying tidal migration. Such behavioral plasticity questions the significance of endogenous rhythms for the regulation of tidal migrations in O. columellaris.

Keywords : Olivella columellaris; sandy beach intertidal zone; underwater sailing locomotion; endogenous clock; tidal migration.

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