Apr 1, 1976

Control of shell settling in the swimming sea anemone Stomphia coccinea

The Journal of Experimental Biology
I D Lawn

Abstract

1. Electrical activity has been recorded from Stomphia coccinea during the behavioural sequence in which the detached anemone settles on to a Modiolus shell. 2. When a responsive tentacle contacts the shell, a short, complex burst of pulses is elicited. These remain confined to the region of contact. The endodermal slow-conduction system (SS2) then begins to fire repetitively (a typical example is 16 SS2 pulses at a mean interpulse interval of 5 s) until the pedal disc begins to inflate. Shell-tentacle contact is essential for stimulation of SS2 activity. 3. The complete response, apart from local bending of the column, may be reproduced by electrical stimulation of the SS2 alone. As few as 10 stimuli at frequencies between 1 shock/s and 1 shock/10 s are required to elicit the response.

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Mentioned in this Paper

Entire Modiolus
Behavior, Animal
Physiologic Pulse
Decompression Sickness
Bending - Changing Basic Body Position
Electrical Activity of Brain
Locomotion
Cnidaria
Foot
Sea Anemones

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