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| Garnero,Analía del Valle; Marcondes,Cintia Righetti; Gunski,Ricardo José; Oliveira,Henrique Nunes de; Lôbo,Raysildo Barbosa. |
| There are few studies on weight covering the full life cycle of Zebu cattle, and there is no entire growth description or mean growth pattern for animals belonging to this breed. In order to provide such data, 1,158 Nelore females born between 1985 and 1995 were weighed 14,563 times from birth to full growth maturity, in ten herds spread over seven Brazilian states. The Von Bertalanffy, Brody, logistic and Gompertz non-linear models were used to obtain the asymptotic weights (A) and the maturation rates (K). The (co)variance and breeding value components for A and K were obtained by using the multiple trait derivative free restricted maximum likelihood method under the animal model. Genetic trends were calculated in function of the mean expected progeny... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adult weight; Bovine(s); Genetic trends; Maturation rate; Simulation with growth curves. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000400012 |
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| Araújo,Ronyere Olegário de; Marcondes,Cintia Righetti; Damé,Maria Cecília Florisbal; Garnero,Analía del Valle; Gunski,Ricardo José; Everling,Dionéia Magda; Rorato,Paulo Roberto Nogara. |
| With the objective of to adjust nonlinear models for the growth curves for a buffaloes herd raised in floodable lands in Rio Grande do Sul state, monthly records measured from birth to two years-old of 64 males and 63 females born between 1982 and 1989 were used. The models used were: Von Bertalanffy, Brody, Gompertz and Logistic. The parameters were estimated by NLIN procedure and the criteria used to evaluate the adjustment given by the models were: asymptotic standard deviation; coefficient of determination; average absolute deviation of residues and asymptotic index. Von Bertalanffy and Brody models overestimated the male asymptotic weight (A) in 15.9 and 171.3kg, respectively, and the Gompertz and Logistic models underestimated it in 4.5 and 13.4kg,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asymptotic weight; Buffalo; Maturation rate. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000300022 |
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