Growth curve in Santa Ines sheep

被引：57
|
作者：
Acioli da Silva, Laiza Sofia [1 ]
Fraga, Angelina Bossi [1 ]
da Silva, Fabiane de Lima [2 ]
Guimaraes Beelen, Patricia Mendes [1 ]
de Oliveira Silva, Rafael Medeiros [1 ]
Tonhati, Humberto [3 ]
Barros, Camila da Costa [1 ]
机构：
[1] Univ Fed Alagoas, Ctr Ciencias Agr, BR-57100000 Rio Largo, Alagoas, Brazil
[2] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, BR-13418900 Sao Paulo, Brazil
[3] Univ Estadual Paulista, Dept Melhoramento Anim, BR-14884900 Sao Paulo, Brazil
来源：
SMALL RUMINANT RESEARCH | 2012年 / 105卷 / 1-3期
关键词：
Non-linear models; Hair sheep; Weight; Growth rate; PARAMETERS;
D O I：
10.1016/j.smallrumres.2011.11.024
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
The objective of this research was to use non-linear models to describe the growth pattern in Santa Ines sheep and to study the influence of environmental effects on curve parameters with the best-fit model. The models included the Brody, Richards, Von Bertalanffy, Gompertz, and Logistic models. We used 773 field reports on 162 animals ranging in age from 120 to 774 days, including 46 males and 116 females. The statistics used to evaluate the quality of fit included RMS (residual mean square), C% (percentage of convergence), R-2 (adjusted determination coefficient) and MAD (mean absolute deviation). Of the fixed effects studied, the only significant relationship was the effect of sex on parameter A. The Richards model was problematic during the process of convergence. Considering all studied criteria, the Logistic model presented the best fit in describing the growth pattern in Santa Ines sheep. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：182 / 185
页数：4
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