Adjustment of growth parameters for the major body components of pullets1

Detalhes bibliográficos
Autor(a) principal: Da Silva, Edney Pereira
Data de Publicação: 2016
Outros Autores: Sakomura, Nilva Kazue, De Paula Dorigam, Juliano Cesar, Malheiros, Euclides Braga, Peruzzi, Nelson José
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.5935/1806-6690.20160069
http://hdl.handle.net/11449/168602
Resumo: The purpose of this research was analyze the fit of Gompertz function with or without fixing some of the parameters to describe body growth and major bodily chemical constituents of growing pullets. Weekly, data of body weight and chemical components of body free of feathers and feathers were collected from 1,200 chicks of four laying strains (Hisex Brown, Hisex White, Hy Line Brown and Hy Line White W36) until 18 weeks of age. The variables were subjected to two adjustments fixing, or not, some parameters of Gompertz function. The allometric model parameters were calculated for the chemical components. The lipid and protein composition of the body free of feathers were the components with the biggest change in the last weeks. Moreover, the chemical composition of the feather showed small variation. The parameters of the Gompertz function assumed values according to the employed adjustment, especially for protein and fat of the body free of feathers carcass. The adjustment of the Gompertz function by fixing the two parameters allowed coherence and biological significance. The allometric coefficients indicate that as the protein weight increased, the proportion of fat increased and the proportion of water and ashes in the body decreased. The fit of the model allows setting the parameters with consistency and biological significance without losing accuracy in the estimates.
id UNSP_be42376e69751a182f860c43c4cfe56d
oai_identifier_str oai:repositorio.unesp.br:11449/168602
network_acronym_str UNSP
network_name_str Repositório Institucional da UNESP
repository_id_str 2946
spelling Adjustment of growth parameters for the major body components of pullets1CarcassFeatherGrowth curveWeight proteinThe purpose of this research was analyze the fit of Gompertz function with or without fixing some of the parameters to describe body growth and major bodily chemical constituents of growing pullets. Weekly, data of body weight and chemical components of body free of feathers and feathers were collected from 1,200 chicks of four laying strains (Hisex Brown, Hisex White, Hy Line Brown and Hy Line White W36) until 18 weeks of age. The variables were subjected to two adjustments fixing, or not, some parameters of Gompertz function. The allometric model parameters were calculated for the chemical components. The lipid and protein composition of the body free of feathers were the components with the biggest change in the last weeks. Moreover, the chemical composition of the feather showed small variation. The parameters of the Gompertz function assumed values according to the employed adjustment, especially for protein and fat of the body free of feathers carcass. The adjustment of the Gompertz function by fixing the two parameters allowed coherence and biological significance. The allometric coefficients indicate that as the protein weight increased, the proportion of fat increased and the proportion of water and ashes in the body decreased. The fit of the model allows setting the parameters with consistency and biological significance without losing accuracy in the estimates.Departamento de ZootecniaDepartamento de Ciências ExatasUniversidade Estadual Paulista (Unesp)Da Silva, Edney PereiraSakomura, Nilva KazueDe Paula Dorigam, Juliano CesarMalheiros, Euclides BragaPeruzzi, Nelson José2018-12-11T16:42:07Z2018-12-11T16:42:07Z2016-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article572-581application/pdfhttp://dx.doi.org/10.5935/1806-6690.20160069Revista Ciencia Agronomica, v. 47, n. 3, p. 572-581, 2016.1806-66900045-6888http://hdl.handle.net/11449/16860210.5935/1806-6690.20160069S1806-669020160003005722-s2.0-84964587032S1806-66902016000300572.pdf4726596193949022615291489137172661523290002748580000-0003-4179-00640000-0001-5707-4113Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Ciencia Agronomica0,498info:eu-repo/semantics/openAccess2023-11-23T06:10:40Zoai:repositorio.unesp.br:11449/168602Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:28:59.753095Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Adjustment of growth parameters for the major body components of pullets1
title Adjustment of growth parameters for the major body components of pullets1
spellingShingle Adjustment of growth parameters for the major body components of pullets1
Da Silva, Edney Pereira
Carcass
Feather
Growth curve
Weight protein
title_short Adjustment of growth parameters for the major body components of pullets1
title_full Adjustment of growth parameters for the major body components of pullets1
title_fullStr Adjustment of growth parameters for the major body components of pullets1
title_full_unstemmed Adjustment of growth parameters for the major body components of pullets1
title_sort Adjustment of growth parameters for the major body components of pullets1
author Da Silva, Edney Pereira
author_facet Da Silva, Edney Pereira
Sakomura, Nilva Kazue
De Paula Dorigam, Juliano Cesar
Malheiros, Euclides Braga
Peruzzi, Nelson José
author_role author
author2 Sakomura, Nilva Kazue
De Paula Dorigam, Juliano Cesar
Malheiros, Euclides Braga
Peruzzi, Nelson José
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Da Silva, Edney Pereira
Sakomura, Nilva Kazue
De Paula Dorigam, Juliano Cesar
Malheiros, Euclides Braga
Peruzzi, Nelson José
dc.subject.por.fl_str_mv Carcass
Feather
Growth curve
Weight protein
topic Carcass
Feather
Growth curve
Weight protein
description The purpose of this research was analyze the fit of Gompertz function with or without fixing some of the parameters to describe body growth and major bodily chemical constituents of growing pullets. Weekly, data of body weight and chemical components of body free of feathers and feathers were collected from 1,200 chicks of four laying strains (Hisex Brown, Hisex White, Hy Line Brown and Hy Line White W36) until 18 weeks of age. The variables were subjected to two adjustments fixing, or not, some parameters of Gompertz function. The allometric model parameters were calculated for the chemical components. The lipid and protein composition of the body free of feathers were the components with the biggest change in the last weeks. Moreover, the chemical composition of the feather showed small variation. The parameters of the Gompertz function assumed values according to the employed adjustment, especially for protein and fat of the body free of feathers carcass. The adjustment of the Gompertz function by fixing the two parameters allowed coherence and biological significance. The allometric coefficients indicate that as the protein weight increased, the proportion of fat increased and the proportion of water and ashes in the body decreased. The fit of the model allows setting the parameters with consistency and biological significance without losing accuracy in the estimates.
publishDate 2016
dc.date.none.fl_str_mv 2016-07-01
2018-12-11T16:42:07Z
2018-12-11T16:42:07Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.5935/1806-6690.20160069
Revista Ciencia Agronomica, v. 47, n. 3, p. 572-581, 2016.
1806-6690
0045-6888
http://hdl.handle.net/11449/168602
10.5935/1806-6690.20160069
S1806-66902016000300572
2-s2.0-84964587032
S1806-66902016000300572.pdf
4726596193949022
6152914891371726
6152329000274858
0000-0003-4179-0064
0000-0001-5707-4113
url http://dx.doi.org/10.5935/1806-6690.20160069
http://hdl.handle.net/11449/168602
identifier_str_mv Revista Ciencia Agronomica, v. 47, n. 3, p. 572-581, 2016.
1806-6690
0045-6888
10.5935/1806-6690.20160069
S1806-66902016000300572
2-s2.0-84964587032
S1806-66902016000300572.pdf
4726596193949022
6152914891371726
6152329000274858
0000-0003-4179-0064
0000-0001-5707-4113
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Revista Ciencia Agronomica
0,498
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 572-581
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128937405972480