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Size Ratios and Artifacts: Hutchinson's Rule Revisited

John McA. Eadie, Louis Broekhoven and Patrick Colgan
The American Naturalist
Vol. 129, No. 1 (Jan., 1987), pp. 1-17
Stable URL: http://www.jstor.org/stable/2461961
Page Count: 17
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Size Ratios and Artifacts: Hutchinson's Rule Revisited
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Abstract

We show that size ratios within the range predicted by Hutchinson's rule invariably result, given only that animal sizes are distributed lognormally and that the variances of these distributions are small. We argue that both these conditions are properties of a wide variety of animate and inanimate objects in nature, and therefore size ratios tell us little about the processes structuring animal communities. Our results confirm previous suggestions that Hutchinson's constant is an artifact, and we present a reasonable mechanism to suggest how such an artifact might arise.

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