The Scaling of Maximum and Basal Metabolic Rates of Mammals and Birds

Details The Scaling of Maximum and Basal Metabolic Rates of Mammals and Birds The Scaling of Maximum and Basal Metabolic Rates of Mammals and Birds

2004-09-24

arxiv.org/abs/physics/0409128v1

Physics

Biological Physics

5 pages

Scientific paper

Allometric scaling is one of the most pervasive laws in biology. Its origin, however, is still a matter of dispute. Recent studies have established that maximum metabolic rate scales with an exponent larger than that found for basal metabolism. This unpredicted result sets a challenge that can decide which of the concurrent hypotheses is the correct theory. Here we show that both scaling laws can be deduced from a single network model. Besides the 3/4-law for basal metabolism, the model predicts that maximum metabolic rate scales as $M^{6/7}$, maximum heart rate as $M^{-1/7}$, and muscular capillary density as $M^{-1/7}$, in agreement with data.

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