Parametrization of the Davis Growth Model using data of crossbred zebu cattle.
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059601 http://dx.doi.org/10.1590/1678-992X-2015-0284 |
Resumo: | The system of differential equations proposed by Oltjen et al. [1986, named Davis Growth Model (DGM)] to represent cattle growth has been parameterized with data from Bos taurus (British) and Bos indicus (Nellore) breeds. The DGM has been successfully used for simulation and decision support in the United States. However, the effect of about 30 years of genetic improvement and the use of different breeds may affect the model parameter values, which also may need to be re-estimated for crossbred animals. The aim of this study was to estimate parameter values and confidence intervals for the DGM with growth and body composition data from Zebu crossbred animals. Confidence intervals and asymptotic distribution were generated through nonparametric bootstrap with data from a field experiment conducted in Brazil. The parameters showed normal probability distribution for most scenarios. The rate constant for deoxyribonucleic acid (DNA) synthesis had a minimum increase of 156 % and the maximum of 389 %, compared to the original values and the maintenance requirement had a minimum increase of 126 % and maximum of 160 % compared to the original values. Lower limits of 95 % confidence intervals for the parameters related to maintenance and protein accretion rates were higher than the original estimates of the DGM, evidencing genetic differences of the Zebu crossbred animals in relation to the original DGM parameters. |
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Parametrization of the Davis Growth Model using data of crossbred zebu cattle.Asymptotic distributionCalibratingCattle growthNonparametric bootstrapOrdinary differential equationsAgriculturaModelo MatemáticoBeef cattleCattleZebuMathematical modelsThe system of differential equations proposed by Oltjen et al. [1986, named Davis Growth Model (DGM)] to represent cattle growth has been parameterized with data from Bos taurus (British) and Bos indicus (Nellore) breeds. The DGM has been successfully used for simulation and decision support in the United States. However, the effect of about 30 years of genetic improvement and the use of different breeds may affect the model parameter values, which also may need to be re-estimated for crossbred animals. The aim of this study was to estimate parameter values and confidence intervals for the DGM with growth and body composition data from Zebu crossbred animals. Confidence intervals and asymptotic distribution were generated through nonparametric bootstrap with data from a field experiment conducted in Brazil. The parameters showed normal probability distribution for most scenarios. The rate constant for deoxyribonucleic acid (DNA) synthesis had a minimum increase of 156 % and the maximum of 389 %, compared to the original values and the maintenance requirement had a minimum increase of 126 % and maximum of 160 % compared to the original values. Lower limits of 95 % confidence intervals for the parameters related to maintenance and protein accretion rates were higher than the original estimates of the DGM, evidencing genetic differences of the Zebu crossbred animals in relation to the original DGM parameters.ADRIELE GIARETTA BIASE, Esalq/USP; CARLOS TADEU DOS SANTOS DIAS, Esalq/USP; LUIS GUSTAVO BARIONI, CNPTIA; TIAGO ZANETT ALBERTINI, Esalq/USP; LUCIETA GUERREIRO MARTORANO, CPATU; JAMES W. OLTJEN, University of California; DANTE PAZZANESE DUARTE LANNA, Esalq/USP; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; SERGIO RAPOSO DE MEDEIROS, CNPGC; ROBERTO AUGUSTO DE ALMEIDA TORRES JUNIOR, CNPGC.BIASE, A. G.DIAS, C. T. dos S.BARIONI, L. G.ALBERTINI, T. Z.MARTORANO, L. G.OLTJEN, J. W.LANNA, D. P. D.OLIVEIRA, P. P. A.MEDEIROS, S. R. deTORRES JUNIOR, R. A. de A.2016-12-29T11:11:11Z2016-12-29T11:11:11Z2016-12-2920172017-03-30T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleScientia Agricola, v. 74, n. 1, p.8-17, Jan./Feb. 2017.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059601http://dx.doi.org/10.1590/1678-992X-2015-0284enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T04:00:01Zoai:www.alice.cnptia.embrapa.br:doc/1059601Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T04:00:01falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T04:00:01Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Parametrization of the Davis Growth Model using data of crossbred zebu cattle. |
title |
Parametrization of the Davis Growth Model using data of crossbred zebu cattle. |
spellingShingle |
Parametrization of the Davis Growth Model using data of crossbred zebu cattle. BIASE, A. G. Asymptotic distribution Calibrating Cattle growth Nonparametric bootstrap Ordinary differential equations Agricultura Modelo Matemático Beef cattle Cattle Zebu Mathematical models |
title_short |
Parametrization of the Davis Growth Model using data of crossbred zebu cattle. |
title_full |
Parametrization of the Davis Growth Model using data of crossbred zebu cattle. |
title_fullStr |
Parametrization of the Davis Growth Model using data of crossbred zebu cattle. |
title_full_unstemmed |
Parametrization of the Davis Growth Model using data of crossbred zebu cattle. |
title_sort |
Parametrization of the Davis Growth Model using data of crossbred zebu cattle. |
author |
BIASE, A. G. |
author_facet |
BIASE, A. G. DIAS, C. T. dos S. BARIONI, L. G. ALBERTINI, T. Z. MARTORANO, L. G. OLTJEN, J. W. LANNA, D. P. D. OLIVEIRA, P. P. A. MEDEIROS, S. R. de TORRES JUNIOR, R. A. de A. |
author_role |
author |
author2 |
DIAS, C. T. dos S. BARIONI, L. G. ALBERTINI, T. Z. MARTORANO, L. G. OLTJEN, J. W. LANNA, D. P. D. OLIVEIRA, P. P. A. MEDEIROS, S. R. de TORRES JUNIOR, R. A. de A. |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
ADRIELE GIARETTA BIASE, Esalq/USP; CARLOS TADEU DOS SANTOS DIAS, Esalq/USP; LUIS GUSTAVO BARIONI, CNPTIA; TIAGO ZANETT ALBERTINI, Esalq/USP; LUCIETA GUERREIRO MARTORANO, CPATU; JAMES W. OLTJEN, University of California; DANTE PAZZANESE DUARTE LANNA, Esalq/USP; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; SERGIO RAPOSO DE MEDEIROS, CNPGC; ROBERTO AUGUSTO DE ALMEIDA TORRES JUNIOR, CNPGC. |
dc.contributor.author.fl_str_mv |
BIASE, A. G. DIAS, C. T. dos S. BARIONI, L. G. ALBERTINI, T. Z. MARTORANO, L. G. OLTJEN, J. W. LANNA, D. P. D. OLIVEIRA, P. P. A. MEDEIROS, S. R. de TORRES JUNIOR, R. A. de A. |
dc.subject.por.fl_str_mv |
Asymptotic distribution Calibrating Cattle growth Nonparametric bootstrap Ordinary differential equations Agricultura Modelo Matemático Beef cattle Cattle Zebu Mathematical models |
topic |
Asymptotic distribution Calibrating Cattle growth Nonparametric bootstrap Ordinary differential equations Agricultura Modelo Matemático Beef cattle Cattle Zebu Mathematical models |
description |
The system of differential equations proposed by Oltjen et al. [1986, named Davis Growth Model (DGM)] to represent cattle growth has been parameterized with data from Bos taurus (British) and Bos indicus (Nellore) breeds. The DGM has been successfully used for simulation and decision support in the United States. However, the effect of about 30 years of genetic improvement and the use of different breeds may affect the model parameter values, which also may need to be re-estimated for crossbred animals. The aim of this study was to estimate parameter values and confidence intervals for the DGM with growth and body composition data from Zebu crossbred animals. Confidence intervals and asymptotic distribution were generated through nonparametric bootstrap with data from a field experiment conducted in Brazil. The parameters showed normal probability distribution for most scenarios. The rate constant for deoxyribonucleic acid (DNA) synthesis had a minimum increase of 156 % and the maximum of 389 %, compared to the original values and the maintenance requirement had a minimum increase of 126 % and maximum of 160 % compared to the original values. Lower limits of 95 % confidence intervals for the parameters related to maintenance and protein accretion rates were higher than the original estimates of the DGM, evidencing genetic differences of the Zebu crossbred animals in relation to the original DGM parameters. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12-29T11:11:11Z 2016-12-29T11:11:11Z 2016-12-29 2017 2017-03-30T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Scientia Agricola, v. 74, n. 1, p.8-17, Jan./Feb. 2017. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059601 http://dx.doi.org/10.1590/1678-992X-2015-0284 |
identifier_str_mv |
Scientia Agricola, v. 74, n. 1, p.8-17, Jan./Feb. 2017. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059601 http://dx.doi.org/10.1590/1678-992X-2015-0284 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
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Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
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EMBRAPA |
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EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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