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Effects of size and temperature on developmental time


Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/1655

Effects of size and temperature on developmental time

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Title: Effects of size and temperature on developmental time
Author: Gillooly, James; Charnov, Eric; West, Geoffrey; Savage, Van; Brown, James
Subject: body size
developmental time
Abstract: Body size and temperature are the two most important variables affecting nearly all biological rates and times. The relationship of size and temperature to development is of particular interest, because during ontogeny size changes and temperature often varies. Here we derive a general model, based on first principles of allometry and biochemical kinetics, that predicts the time of ontogenetic development as a function of body mass and temperature. The model fits embryonic development times spanning a wide range of egg sizes and incubation temperatures for birds and aquatic ectotherms (fish, amphibians, aquatic insects and zooplankton). The model also describes nearly 75% of the variation in post-embryonic development among a diverse sample of zooplankton. The remaining variation is partially explained by stoichiometry, specifically the whole-body carbon to phosphorus ratio. Development in other animals at other life stages is also described by this model. These results suggest a general definition of biological time that is approximately invariant and common to all organisms.
Date: 2002-05-02
Publisher: Nature
Citation: Gillooly, J.F., E.L. Charnov, G.B. West, V.M. Savage and J.H. Brown. 2002. Effects of size and temperature on developmental time. Nature 417:70-73
URI: http://hdl.handle.net/1928/1655

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