Relativity of growth in laboratory and farm animals: I. Representation of physiological age and the growth rate time constant

T. C. Bridges, L. W. Turner, R. S. Gates, E. M. Smith

Research output: Contribution to journalArticlepeer-review

Abstract

This article presents a modification of the growth function of Bridges et al. (1986) that incorporates a known biological time unit (gestation period) to represent physiological time for a given animal species. Gestation time was incorporated into the weight-age equation and modified by the growth rate time constant, c, which relates the inflection point of the growth curve to a relatively fixed time unit. Relating the inflection point of the growth curve to an animal gestation period provides a mathematical basis for changing growth curves to account for the "external" influences of management, diet, environment and health that may impact an animal's growth in approaching mature size. Examples are shown using the developed mathematical expression to predict changes in the growth of two different cattle under the effects of early weaning and different nutritional and environmental conditions.

Original languageEnglish (US)
Pages (from-to)1803-1810
Number of pages8
JournalTransactions of the American Society of Agricultural Engineers
Volume43
Issue number6
StatePublished - Dec 1 2000
Externally publishedYes

Keywords

  • Animal growth
  • Gestation period
  • Growth curve
  • Growth rate time constant

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)

Fingerprint

Dive into the research topics of 'Relativity of growth in laboratory and farm animals: I. Representation of physiological age and the growth rate time constant'. Together they form a unique fingerprint.

Cite this