Experimental allometry: effect of size manipulation on metabolic rate of colonial ascidians

TitleExperimental allometry: effect of size manipulation on metabolic rate of colonial ascidians
Publication TypeJournal Article
Year of Publication2005
Refereed DesignationRefereed
AuthorsNakaya, F., Saito Y., & Motokawa T.
JournalProceedings of the Royal Society B: Biological Sciences
Volume272
Issue1575
Pagination1963 - 1969
Date Published09/2005
ISSN1471-2954
Abstract

The allometric scaling of metabolic rate of organisms, the three-quarters power rule, has led to a questioning of the basis for the relation. We attacked this problem experimentally for the first time by employing the modular organism, the ascidian that forms a single layered flat colony, as a model system. The metabolic rate and colony size followed the three-quarters power relation, which held even after the colony size was experimentally manipulated. Our results established that the three-quarters power relation is a real continuous function, not an imaginary statistical regression. The fact that all the hypotheses failed to explain why the two-dimensional organism adhered to the three-quarters power relation led us to propose a new hypothesis, in which the allometric relation derives from the self-organized criticality based on local interaction between modulus-comprising organisms.

DOI10.1098/rspb.2005.3143
Short TitleProceedings of the Royal Society B: Biological Sciences