A general model for ontogenetic growth under food restriction

Chen Hou, Kendra M. Bolt, Aviv Bergman

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Food restriction (FR) retards animals' growth. Understanding the underlying mechanisms of this phenomenon is important to conceptual problems in life-history theory, as well as to applied problems in animal husbandry and biomedicine. Despite a considerable amount of empirical data published since the 1930s, there is no relevant general theoretical framework that predicts how animals vary their energy budgets and life-history traits under FR. In this paper, we develop such a general quantitative model based on fundamental principles of metabolic energy allocation during ontogeny. This model predicts growth curves under varying conditions of FR, such as the compensatory growth, different age at which FR begins, its degree and its duration. Our model gives a quantitative explanation for the counterintuitive phenomenon that under FR, lower body temperature and lower metabolism lead to faster growth and larger adult size. This model also predicts that the animals experiencing FR reach the same fraction of their adult mass at the same age as their ad libitum counterparts. All predictions are well supported by empirical data from mammals and birds of varying body size, under different conditions of FR.

Original languageEnglish (US)
Pages (from-to)2881-2890
Number of pages10
JournalProceedings of the Royal Society B: Biological Sciences
Volume278
Issue number1720
DOIs
StatePublished - Jan 1 2011

Keywords

  • Energy allocation
  • Food restriction
  • Growth
  • Metabolism

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)
  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)

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