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

AuthorsDarmani Kuhi, H.; López, Secundino ; France, J.; Mohit, A.; Shabanpour, A.; Ghavi Hossein-Zadeh, N.; Falahi, S.
KeywordsGrowth functions
Sinusoidal equation
Issue Date2019
PublisherUniversidade Estadual de Maringá
CitationActa Scientiarum - Animal Sciences 41(1): e45990 (2019)
AbstractBecause 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.
Description7 páginas, 2 figuras, 4 tablas.
Publisher version (URL)http://dx.doi.org/10.4025/actascianimsci.v41i1.45990
Identifiersdoi: 10.4025/actascianimsci.v41i1.45990
e-issn: 1807-8672
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