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On the ecology of a dense bed of the brittle-star Ophiothrix fragilis

Published online by Cambridge University Press:  11 May 2009

G. F. Warner
Zoology Department, Reading University



The occurrence of dense beds of the brittle-star Ophiothrix fragilis (Abildgaard) in certain localized areas around the British Isles has been reported by several authors (Allen, 1899; Vevers, 1952; Cabioch, 1961; Holme, 1961; Brun, 1969), with population densities varying from 340/m2 (Vevers, 1952) to 2196/m2 (Brun, 1969). These populations seem to be permanent features of the sea bed since the aggregation sampled by Allen was in the same position as that photographed by Vevers fifty years later.

Research Article
Copyright © Marine Biological Association of the United Kingdom 1971

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