Bivalve Mollusks: Fluid Dynamics of Burrowing

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Science  22 Apr 1966:
Vol. 152, Issue 3721, pp. 523-525
DOI: 10.1126/science.152.3721.523


When bivalves burrow into soft substrates the foot is first extended and then dilated to obtain a firm anchorage before retraction pulls the shell downward. Pedal dilation is principally caused by adduction of the valves. The hinged shell futnctions as a hydraulic machine in which the strength of the adductor muscles is transferred to the distal part of the foot by means of the body fluids.

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