Descripción de la curva de crecimiento en búfalos (Bubalus bubalis Artiodactyla, Bovidae) mediante modelos aditivos mixtos generalizados con suavizaciones

ABSTRACT: The methodology of generalized additive models with smooth functions (GAMs) is an alternative to describe the growth curve because it is precise and adjusted to the nature of data. The aim of this study was to describe body weight growth in buffaloes using GAMs. One hundred twenty-four thousand two hundred sixty-four records of body weight at birth, weaning, 12, 24, and 36 months of age were used. The records were collected from 30,654 female and crossbred male buffaloes from four dual-purpose farms located in Córdoba, Colombia. The model included the random effect of animal within farm and the fixed effects of farm, weighing month, year of birth and age as a smoothed function. Both fixed and random effects were statistically significant (p < 0.05) for both sexes. The smoothed age effect was also significant (p < 0.001). The highest growth rate occurred during the period between birth and weaning. The weight average for males and females were 164 ± 9.7 kg and 160 ± 14.6 kg at weaning, 214 ± 9.6 kg and 206 ± 13.2 at one year, 376 ± 10.2 kg and 333 ± 16.1kg at two years and 493 ± 7 kg and 435 ± 13.1 kg at three years of age. It is concluded that GAMs can be a good alternative to model the growth curve in buffaloes.

• Autores: Barrera Rivera, Diana Carolina; Agudelo, Divier Antonio; Cerón Muñoz, Mario Fernando; Pineda Sierra, Sebastián; Mazo, M.
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2014
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: spa
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/10750
• Acceso en línea: http://hdl.handle.net/10495/10750
• Palabra clave: Ganado Bufalino; Bufalo cattle; Suavización; Smoothing; Aumento de peso; Weight gain
• Rights: openAccess
• License: Atribución-NoComercial-SinDerivadas 2.5 Colombia