Nonlinear equations to determine the growth curve of immunocastrated pigs

Authors

  • Marcos Speroni Ceron Universidade José do Rosário Vellano, Departamento de Agronomia, Rodovia MG-179, Km 0, s/no, CEP 37132-440 Alfenas, MG.
  • Vladimir de Oliveira Universidade Federal de Santa Maria, Departamento de Zootecnia, Centro de Ciências Rurais, Avenida Roraima, no 1.000, CEP 97159-000 Santa Maria, RS.
  • Natielei Alexandre Nunes Novais Pieve Universidade José do Rosário Vellano, Departamento de Agronomia, Rodovia MG-179, Km 0, s/no, CEP 37132-440 Alfenas, MG.
  • Nhayandra Christina Dias e Silva Universidade José do Rosário Vellano, Departamento de Agronomia, Rodovia MG-179, Km 0, s/no, CEP 37132-440 Alfenas, MG.
  • Carlos Augusto Rigon Rossi Universidade Federal de Santa Maria, Departamento de Clínica de Grandes Animais, Centro de Ciências Rurais, Avenida Roraima, no 1.000, CEP 97105-900 Santa Maria, RS.
  • Bruno Neutzling Fraga Universidade Federal do Pampa, Campus Itaqui, Rua Joaquim de Sá Britto, s/no, CEP 3432-1850 Itaqui, RS.
  • Henrique da Costa Mendes Muniz Universidade Federal de Santa Maria, Departamento de Zootecnia, Centro de Ciências Rurais, Avenida Roraima, no 1.000, CEP 97159-000 Santa Maria, RS.
  • Alexandre de Mello Kessler Universidade Federal do Rio Grande do Sul, Departamento de Zootecnia, Faculdade de Agronomia, Avenida Bento Gonçalves, no 7.712, CEP 91540-000 Porto Alegre, RS.

DOI:

https://doi.org/10.1590/S1678-3921.pab2020.v55.26690

Keywords:

Gompertz, growth rate, logistic equation, von Bertalanffy

Abstract

The objective of this work was to compare the performance of the nonlinear Gompertz, logistic, and von Bertalanffy equations, to describe the growth curve of immunocastrated male pigs from birth until reaching 140 kg body weight. Standard error, number of iterations, mean square of the error, and coefficient of determination were compared between the models. The logistic and von Bertalanffy equations do not accurately estimate the initial and slaughter weights. The Gompertz equation shows the highest reliability and is, therefore, the most suitable one to describe the growth curve of immunocastrated pigs from birth until 140 kg body weight is reached.

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Published

2020-07-02

How to Cite

Ceron, M. S., Oliveira, V. de, Pieve, N. A. N. N., Silva, N. C. D. e, Rossi, C. A. R., Fraga, B. N., … Kessler, A. de M. (2020). Nonlinear equations to determine the growth curve of immunocastrated pigs. Pesquisa Agropecuaria Brasileira, 55(X), e01184. https://doi.org/10.1590/S1678-3921.pab2020.v55.26690

Issue

V.55, Jan./Dec., 2020 :Continuos publication

Section

ANIMAL SCIENCE