Acta Scientiarum: Animal Sciences (Jun 2019)

A sinusoidal equation as an alternative to classical growth functions to describe growth profiles in turkeys

  • Hassan Darmani Kuhi,
  • Secundino Lopez,
  • James France,
  • Ardeshir Mohit,
  • Arezu Shabanpour,
  • Navid Ghavi Hosssein-Zadeh,
  • Saeed Falahi

DOI
https://doi.org/10.4025/actascianimsci.v41i1.45990
Journal volume & issue
Vol. 41, no. 1
pp. e45990 – e45990

Abstract

Read online

Because of the relatively long growing cycle and the high cost of research into turkey production and nutrition, the potential benefits from modelling growth in this avian species are considerable. Though there are many studies aimed at evaluating animal growth models, the number of studies targeting growth models in turkeys is quite limited. In this paper we present a sinusoidal function to describe the evolution of growth in turkeys as a function of time based on data published by Aviagen. The new function was evaluated with regard to its ability to describe the relationship between body weight and age in turkeys and was compared to four standard growth functions: the Gompertz, logistic, Lopez, and Richards. The results of this study show that the new sinusoidal function precisely describes the growth dynamics of turkeys. Fitting the functions to different data profiles nearly always led to the same or less maximized log-likelihood values for the sinusoidal equation, indicating its suitability in describing growth data from turkeys.

Keywords