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The kinetics of growth control in a colonial hydroid

Published online by Cambridge University Press:  11 May 2009

A. R. D. Stebbing
Affiliation:
Natural Environment Research Council, Institute for Marine Environmental Research, Prospect Place, The Hoe, Plymouth

Extract

It is suggested that the cumulative view of growth in which some index of biomass is plotted against time tends to obscure temporal variations in the growth process that might provide evidence of how it is controlled. Experiments with the colonial hydroid Campanularia flexuosa show that the action of a growth control mechanism can be demonstrated by considering changes in specific rates of growth determined at frequent intervals in time. However, it is also necessary to disturb the growth process slightly in order to initiate the action of the control mechanism, and having done so, to isolate the effect of the disturbance on growth and thus the action of the control mechanism. This is done by expressing the specific growth rate of organisms whose growth is disturbed as a percentage of that of control organisms of the same age.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1981

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