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- W2165663244 abstract "In this paper, parameters that describe growth, as a function of the season in which they were born (dry or rainy), are presented for males of the for males of the Brahman breed that were castrated at birth and raised in their native environment in the intense system of the Llano Venezolano. Data are presented for 1,478 Brahman males that were castrated at birth. Of these, 750 were born in the months of June and July (the rainy season) and 728 were born in January and February (the dry season). The animals born during the dry season were heavier up until the beginning of the fattening period; after weaning, the greatest average daily weight gain coincided in both groups during rainy periods when the pasture production was greater. When comparing the observed weights with the estimates, the Brody model was better at estimating the actual weight of the animals at birth, weaning and maturity in both seasons of birth. The Gompertz, Bertalanffy, Richards and Logistic models overestimated the weights of the animals at birth and at the end of the fattening period; however, they underestimated the weights at weaning and maturity for both birth seasons. Regarding the birth season, no differences were found in the estimated maturation rate for any of the models, although there were differences among the models for the same season of birth. En este trabajo, se presentan los parametros que describen el crecimiento de machos de raza Brahman, castrados al nacimiento y criados en su propio ambiente en sistema intensivo en el Llano Venezolano, en funcion de la epoca de nacimiento (seca o lluviosa). Se registraron datos de pesos de 1.478 machos castrados al nacimiento de raza Brahman, 750 nacidos entre los meses de junio y julio (epoca de lluvia) y 728 nacidos entre los meses de enero y febrero (epoca de sequia). Los animales nacidos en epoca seca presentaron mayores pesos hasta el comienzo del cebo, coincidiendo la mayor ganancia media diaria de peso tras el destete para ambas epocas de nacimiento, con los periodos lluviosos cuando la produccion de pastos era superior. Al comparar los pesos reales observados con los estimados por los diferentes modelos, se encontro que el modelo de Brody fue el que se aproximo mas en su estimacion al peso al nacimiento, al destete y a la madurez de los animales, en ambas epocas de nacimiento. Los modelos de Gompertz, Bertalanffy, Richards y el Logistico, sobrestimaron el peso al nacimiento y al final del cebo, y subestimaron los pesos al destete y a la madurez, en ambas epocas de nacimiento. En funcion de la epoca de nacimiento, no se encontraron diferencias en la tasa de maduracion estimada para ninguno de los modelos, aunque si hubo diferencias entre los modelos para la misma epoca de nacimiento." @default.
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- W2165663244 date "2012-08-01" @default.
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- W2165663244 title "Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons" @default.
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- W2165663244 doi "https://doi.org/10.4067/s0718-16202012000200004" @default.
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