| Registro completo |
| Provedor de dados: |
Animal Sciences
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| País: |
Brazil
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| Título: |
Evaluation of body weight prediction Equations in growing heifers
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| Autores: |
Franco, Marcia de Oliveira
Marcondes, Marcos Inácio
Campos, José Maurício de Souza
Freitas, Denise Ribeiro de
Detmann, Edenio
Valadares Filho, Sebastião de Campos
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| Data: |
2017-04-03
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| Ano: |
2017
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| Palavras-chave: |
Zootecnia
Produção animal
Bovinocultura leiteira body measurements
Dairy heifers
Heart girth
Holsteins.
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| Resumo: |
This study was realized to evaluate prediction models for body weight (BW) using body measurements as heart girth (HG), wither height (WH), hip width (HW), body length (BL) and hip height (HH), and develop new Equations to predict the BW of Holstein and crossbred heifers. Prediction Equations (1, 2, 3, 4, 5 and 6) proposed in previous studies were tested, while body measurements, which were more significant in terms of predicting BW, were used to obtain new Equations. Heart girth was the body measurement with the greater correlation with BW. Equation 4 presented the best prediction results, showing a low average deviation, high accuracy and precision. Equations 1 and 2 predicted with a high presence of bias, while 2 had the lowest value of the concordance correlation coefficient and a great contribution made by systematic error. The 3 model presented a high variability in predicting BW. For both Holstein and crossbred heifers, the Equations evaluated are inadequate for predicting BW. Among the Equations evaluated, the model using HG presented the best adjustment and the greater adjusted coefficient of determination. Body measurements relating to HG and BL were the most significant variables in predicting the BW, resulting in the following Equation: BW = - 372.89 + 2.8072 × HG + 1.6087 × BL.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/33118
10.4025/actascianimsci.v39i2.33118
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| Editor: |
Editora da Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/33118/pdf
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Animal Sciences; v. 39, n. 2 (2017); 201-206
Acta Scientiarum. Animal Sciences; v. 39, n. 2 (2017); 201-206
1807-8672
1806-2636
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| Direitos: |
Direitos autorais 2017 Acta Scientiarum. Animal Sciences
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