An electrophysiological study of mechanisms controlling polyp retraction in colonies of the scleractinian coral Goniopora lobata

Author:

Anderson P. A.

Abstract

1. Electrical or mechanical stimulation of Goniopora lobata produces coordinated retraction of polyps in the colony. With repetitive stimulation, the response spreads in linear, radial increments which become successively smaller with each stimulus. 2. Electrical activity recorded from these colonies is interpreted as originating in a conduction system responsible for effecting the colonial retraction response. The electrical activity spreads incrementally through the colony in a similar manner to the behavioural response. 3. Various hypotheses have been proposed to account for such a spread of electrical acitvity. Of these, only interneural facilitation is of appreciable importance to Goniopora. 4. Temporary termination of a pathway, by the passage of an impulse through it, was found and interpreted as being an additional and important property of the colonial conduction system.

Publisher

The Company of Biologists

Subject

Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics

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3. Invertebrate Nervous Systems;Comprehensive Physiology;1997-12

4. Organization of Conducting Systems in “Simple” Invertebrates: Porifera, Cnidaria and Ctenophora;Nervous Systems in Invertebrates;1987

5. Lophelia Pertusa(L.): Electrical Conduction and Behaviour in a Deep-Water Coral;Journal of the Marine Biological Association of the United Kingdom;1980-05

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