← Volver a resultados
Ficha bibliográfica · Consulta y acceso
Artículo

Nonlinear models for fitting growth curves of Nellore cows reared in the Amazon Biome

Kedma Nayra da Silva Marinho et al · Sociedade Brasileira de Zootecnia · 2013

Acceso abierto disponible
Lectura rápida. Revisá los datos básicos del recurso y luego accedé al contenido desde el botón principal. En esta ficha solo se muestra la información necesaria para identificar la obra, citarla y abrirla.
Publicación seriada

A survey of dairy calf management practices in some producing regions in Brazil

Esta publicación seriada contiene 115 contenidos relacionados.

Acceso al recurso

Entrá al contenido desde la opción principal o elegí otra fuente disponible.

Acceso principal

Acceso abierto disponible

Recurso identificado como acceso abierto, sin confirmar automáticamente si es texto completo directo.
Abrir recurso

Resumen

Descripción general del contenido del recurso.

Growth curves of Nellore cows were estimated by comparing six nonlinear models: Brody, Logistic, two alternatives by Gompertz, Richards and Von Bertalanffy. The models were fitted to weight-age data, from birth to 750 days of age of 29,221 cows, born between 1976 and 2006 in the Brazilian states of Acre, Amapá, Amazonas, Pará, Rondônia, Roraima and Tocantins. The models were fitted by the Gauss-Newton method. The goodness of fit of the models was evaluated by using mean square error, adjusted coefficient of determination, prediction error and mean absolute error. Biological interpretation of parameters was accomplished by plotting estimated weights versus the observed weight means, instantaneous growth rate, absolute maturity rate, relative instantaneous growth rate, inflection point and magnitude of the parameters A (asymptotic weight) and K (maturing rate). The Brody and Von Bertalanffy models fitted the weight-age data but the other models did not. The average weight (A) and growth rate (K) were: 384.6±1.63 kg and 0.0022±0.00002 (Brody) and 313.40±0.70 kg and 0.0045±0.00002 (Von Bertalanffy). The Brody model provides better goodness of fit than the Von Bertalanffy model.

Cómo citar

Elegí el formato que necesitás y copiá la referencia al portapapeles.

APA 7

al, K. N. D. S. M. E. (2013). Nonlinear models for fitting growth curves of Nellore cows reared in the Amazon Biome. https://doi.org/10.1590/S1516-35982013000900006

MLA

al, Kedma Nayra da Silva Marinho et. "Nonlinear models for fitting growth curves of Nellore cows reared in the Amazon Biome." 2013. https://doi.org/10.1590/S1516-35982013000900006.

Chicago

al, Kedma Nayra da Silva Marinho et. 2013. "Nonlinear models for fitting growth curves of Nellore cows reared in the Amazon Biome.". https://doi.org/10.1590/S1516-35982013000900006.

Harvard

al, K. N. D. S. M. E. 2013, Nonlinear models for fitting growth curves of Nellore cows reared in the Amazon Biome, Sociedade Brasileira de Zootecnia, available at: https://doi.org/10.1590/S1516-35982013000900006 [Accessed 29 Jun. 2026].

Compartir e imprimir

Guardá la ficha, copiá su enlace permanente o imprimila como PDF.

Exportar referencia

Si usás un gestor bibliográfico, podés exportar el registro en los formatos más comunes.

Detalles del recurso

Información bibliográfica útil para confirmar que se trata del material correcto.

Título
Nonlinear models for fitting growth curves of Nellore cows reared in the Amazon Biome
Autor / colaboradores
Kedma Nayra da Silva Marinho et al
Editorial
Sociedade Brasileira de Zootecnia
Año de publicación
2013
ISSN
1806-9290
ISSN
1806-9290
Idioma
eng

Materias

Explorá otros recursos relacionados a partir de estas materias.

Copiado