Energy Uptake and Allocation during Ontogeny
All organisms face the problem of how to fuel ontogenetic growth. We present a model, empirically grounded in data from birds and mammals, that correctly predicts how growing animals allocate food energy between synthesis of new biomass and maintenance of existing biomass. Previous energy budget models have typically had their bases in rates of either food consumption or metabolic energy expenditure. Our model provides a framework that reconciles these two approaches and highlights the fundamental principles that determine rates of food assimilation and rates of energy allocation to maintenance, biosynthesis, activity, and storage. The model predicts that growth and assimilation rates for all animals should cluster closely around two universal curves. Data for mammals and birds of diverse body sizes and taxa support these predictions.
C. Hou et al., "Energy Uptake and Allocation during Ontogeny," Science, vol. 322, no. 5902, pp. 736-739, American Association for the Advancement of Science, Oct 2008.
The definitive version is available at http://dx.doi.org/10.1126/science.1162302
Keywords and Phrases
Bioactivity; Bioenergetics; Biomass; Bird; Body Size; Energy Budget; Energy Flow; Food Consumption; Food Intake; Growth Modeling; Mammal; Metabolism; Ontogeny; Resource Allocation; Taxonomy, Article; Biomass; Bird; Body Growth; Body Size; Calculation; Digestion; Energy Consumption; Energy Expenditure; Food Intake; Mammal; Nonhuman; Ontogeny; Prediction; Priority Journal; Rat; Synthesis, Animals; Basal Metabolism; Biomass; Birds; Body Size; Energy Intake; Energy Metabolism; Female; Food; Growth; Male; Mammals; Mathematics; Models, Biological, Animalia; Aves; Mammalia
International Standard Serial Number (ISSN)
Article - Journal
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