Modelling energy utilization for laying type Pullets
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1516-635X2005000100007 http://hdl.handle.net/11449/26420 |
Resumo: | Three trials were carried out to determine energy metabolized (EM) requirement model for starting and growing pullets from different strains, at five ambient temperatures and different percentage feather coverage. In Trial I, metabolizable energy requirements for maintenance (MEm) and efficiency of energy utilization were estimated using 64 birds of two different strains, Hy-Line W36 (HLW36) and Hy-Line Semi-heavy (HLSH), from 9 to 13 weeks of age. The effects of ambient temperature (12, 18, 24, 30 and 36ºC) and percentage feather coverage (0, 50 and 100%) on MEm were assessed in the second trial, using 48 birds per temperature per strain (HLSH and HLW36) from 9 to 13 weeks of age. Trial III evaluated ME requirements for weight gain (MEg) using 1,200 birds from two light strains (HLW36 and Hisex Light, HL) and two semi-heavy strains (HLSH and Hisex Semi-heavy, HSH) reared until 18 weeks of age. According to the prediction models, MEm changed as a function of temperature and feather coverage, whereas MEg changed as a function of age and bird strain. Thus, two models were developed for birds aged 1 to 6 weeks, one model for the light strain and one for the semi-heavy strain. Energy requirements (ER) were different among strains from 7 to 12 weeks, and therefore 4 models were elaborated. From 13 to 18 weeks, one single model was produced for semi-heavy birds, since ER between semi-heavy strains were not different, whereas two different models were elaborated for the light layers. MEg of light birds was higher than MEg of semi-heavy birds, independent of age. |
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Repositório Institucional da UNESP |
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Modelling energy utilization for laying type PulletsBody compositionenergy requirementsfeather coverageLaying hensmodelTemperatureThree trials were carried out to determine energy metabolized (EM) requirement model for starting and growing pullets from different strains, at five ambient temperatures and different percentage feather coverage. In Trial I, metabolizable energy requirements for maintenance (MEm) and efficiency of energy utilization were estimated using 64 birds of two different strains, Hy-Line W36 (HLW36) and Hy-Line Semi-heavy (HLSH), from 9 to 13 weeks of age. The effects of ambient temperature (12, 18, 24, 30 and 36ºC) and percentage feather coverage (0, 50 and 100%) on MEm were assessed in the second trial, using 48 birds per temperature per strain (HLSH and HLW36) from 9 to 13 weeks of age. Trial III evaluated ME requirements for weight gain (MEg) using 1,200 birds from two light strains (HLW36 and Hisex Light, HL) and two semi-heavy strains (HLSH and Hisex Semi-heavy, HSH) reared until 18 weeks of age. According to the prediction models, MEm changed as a function of temperature and feather coverage, whereas MEg changed as a function of age and bird strain. Thus, two models were developed for birds aged 1 to 6 weeks, one model for the light strain and one for the semi-heavy strain. Energy requirements (ER) were different among strains from 7 to 12 weeks, and therefore 4 models were elaborated. From 13 to 18 weeks, one single model was produced for semi-heavy birds, since ER between semi-heavy strains were not different, whereas two different models were elaborated for the light layers. MEg of light birds was higher than MEg of semi-heavy birds, independent of age.Universidade Estadual Paulista Faculdade Ciências Agrárias e Veterinárias Departamento de ZootecniaEmpresa Brasileira de Pesquisa Agropecuária Researcher CNPUVUniversidade Estadual Paulista Faculdade Ciências Agrárias e Veterinárias Departamento de ZootecniaFundação APINCO de Ciência e Tecnologia AvícolasUniversidade Estadual Paulista (Unesp)Empresa Brasileira de Pesquisa Agropecuária Researcher CNPUVNeme, R [UNESP]Sakomura, NK [UNESP]Fialho, FBFreitas, ER [UNESP]Fukayama, EH [UNESP]2014-05-20T15:07:13Z2014-05-20T15:07:13Z2005-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article39-46application/pdfhttp://dx.doi.org/10.1590/S1516-635X2005000100007Revista Brasileira de Ciência Avícola. Fundação APINCO de Ciência e Tecnologia Avícolas, v. 7, n. 1, p. 39-46, 2005.1516-635Xhttp://hdl.handle.net/11449/2642010.1590/S1516-635X2005000100007S1516-635X2005000100007S1516-635X2005000100007.pdf61523290002748580000-0001-5707-4113SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Ciência Avícola0.463info:eu-repo/semantics/openAccess2023-12-15T06:19:20Zoai:repositorio.unesp.br:11449/26420Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-15T06:19:20Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Modelling energy utilization for laying type Pullets |
title |
Modelling energy utilization for laying type Pullets |
spellingShingle |
Modelling energy utilization for laying type Pullets Neme, R [UNESP] Body composition energy requirements feather coverage Laying hens model Temperature |
title_short |
Modelling energy utilization for laying type Pullets |
title_full |
Modelling energy utilization for laying type Pullets |
title_fullStr |
Modelling energy utilization for laying type Pullets |
title_full_unstemmed |
Modelling energy utilization for laying type Pullets |
title_sort |
Modelling energy utilization for laying type Pullets |
author |
Neme, R [UNESP] |
author_facet |
Neme, R [UNESP] Sakomura, NK [UNESP] Fialho, FB Freitas, ER [UNESP] Fukayama, EH [UNESP] |
author_role |
author |
author2 |
Sakomura, NK [UNESP] Fialho, FB Freitas, ER [UNESP] Fukayama, EH [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Empresa Brasileira de Pesquisa Agropecuária Researcher CNPUV |
dc.contributor.author.fl_str_mv |
Neme, R [UNESP] Sakomura, NK [UNESP] Fialho, FB Freitas, ER [UNESP] Fukayama, EH [UNESP] |
dc.subject.por.fl_str_mv |
Body composition energy requirements feather coverage Laying hens model Temperature |
topic |
Body composition energy requirements feather coverage Laying hens model Temperature |
description |
Three trials were carried out to determine energy metabolized (EM) requirement model for starting and growing pullets from different strains, at five ambient temperatures and different percentage feather coverage. In Trial I, metabolizable energy requirements for maintenance (MEm) and efficiency of energy utilization were estimated using 64 birds of two different strains, Hy-Line W36 (HLW36) and Hy-Line Semi-heavy (HLSH), from 9 to 13 weeks of age. The effects of ambient temperature (12, 18, 24, 30 and 36ºC) and percentage feather coverage (0, 50 and 100%) on MEm were assessed in the second trial, using 48 birds per temperature per strain (HLSH and HLW36) from 9 to 13 weeks of age. Trial III evaluated ME requirements for weight gain (MEg) using 1,200 birds from two light strains (HLW36 and Hisex Light, HL) and two semi-heavy strains (HLSH and Hisex Semi-heavy, HSH) reared until 18 weeks of age. According to the prediction models, MEm changed as a function of temperature and feather coverage, whereas MEg changed as a function of age and bird strain. Thus, two models were developed for birds aged 1 to 6 weeks, one model for the light strain and one for the semi-heavy strain. Energy requirements (ER) were different among strains from 7 to 12 weeks, and therefore 4 models were elaborated. From 13 to 18 weeks, one single model was produced for semi-heavy birds, since ER between semi-heavy strains were not different, whereas two different models were elaborated for the light layers. MEg of light birds was higher than MEg of semi-heavy birds, independent of age. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-03-01 2014-05-20T15:07:13Z 2014-05-20T15:07:13Z |
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/10.1590/S1516-635X2005000100007 Revista Brasileira de Ciência Avícola. Fundação APINCO de Ciência e Tecnologia Avícolas, v. 7, n. 1, p. 39-46, 2005. 1516-635X http://hdl.handle.net/11449/26420 10.1590/S1516-635X2005000100007 S1516-635X2005000100007 S1516-635X2005000100007.pdf 6152329000274858 0000-0001-5707-4113 |
url |
http://dx.doi.org/10.1590/S1516-635X2005000100007 http://hdl.handle.net/11449/26420 |
identifier_str_mv |
Revista Brasileira de Ciência Avícola. Fundação APINCO de Ciência e Tecnologia Avícolas, v. 7, n. 1, p. 39-46, 2005. 1516-635X 10.1590/S1516-635X2005000100007 S1516-635X2005000100007 S1516-635X2005000100007.pdf 6152329000274858 0000-0001-5707-4113 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista Brasileira de Ciência Avícola 0.463 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
39-46 application/pdf |
dc.publisher.none.fl_str_mv |
Fundação APINCO de Ciência e Tecnologia Avícolas |
publisher.none.fl_str_mv |
Fundação APINCO de Ciência e Tecnologia Avícolas |
dc.source.none.fl_str_mv |
SciELO 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_ |
1799965296554934272 |