Growth Curve Fitting in Livestock
Growth curve fitting is the mathematical modeling of animal body weight and size changes over time. Developed by animal biologists and statisticians in the 1970s-1980s (Fitzhugh), the method applies nonlinear regression to weight data, extracting parameters that characterize growth rate, time to maturity, and asymptotic mature weight. Curve fitting supports comparisons of genetics, nutrition, and management effects on growth efficiency and enables prediction of market weight and slaughter timing.
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- Menchaca, M. A., & Chase, C. C. (2002). Body measurements and condition scores for beef cattle. Veterinary Clinics of North America: Food Animal Practice, 19(3), 387-405. · URL
- Brown, J. L., Cummins, L., Herring, W., Waldner, T., & Roesler, R. (2003). Comparative evaluation of growth models for modeling beef cattle growth. Journal of Animal Science, 81(7), 1813-1820. · URL
- Fitzhugh, H. A. (1976). Analysis of growth curves and strategies for altering their shape. Journal of Animal Science, 42(4), 1036-1051. · DOI 10.2527/jas1976.4241036x
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