A description of the potential growth and body composition of two commercial broiler strains

Detalhes bibliográficos
Autor(a) principal: Vargas, L. [UNESP]
Data de Publicação: 2020
Outros Autores: Sakomura, N. K. [UNESP], Leme, B. B. [UNESP], Antayhua, F. [UNESP], Reis, M. [UNESP], Gous, R., Fisher, C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1080/00071668.2020.1716300
http://hdl.handle.net/11449/200065
Resumo: 1. The potential growth of feathers and feather-free body and their chemical components was measured in two commercial broiler strains. 2. A total of 200 chicks of each sex x strain were fed adequate amounts of dietary protein using a four-phase feeding programme. Ten birds per genotype were sampled at 14, 28, 42, 56, 70, 84, 98 and 112 d of age. They were weighed before and after being dry-plucked to determine the weight of feathers, and the feather-free body was then minced and analysed for water, protein and lipid. 3. Body weights and chemical composition of males of the two strains were similar throughout the trial. Females of the two strains differed only in their body lipid contents, with mature Cobb females being higher than Ross (1371 vs. 1210 g). 4. Mature body weights of males and females from both strains averaged 8420 g and 6650 g; mature body protein weights averaged 1555 g and 1030 g; and mature body lipid contents averaged 908 and 1290 g, respectively. 5. Rates of maturing per day of body weights of males and females of both strains averaged 0.0385 and 0.0368; feather-free body protein was 0.0316 and 0.0348 and body lipid was 0.0503 and 0.0375, respectively. The rates for body lipid differed between Cobb and Ross females (0.0352 vs. 0.0397/d). Separate equations were required for males and females to describe the allometric relationship between lipid and protein in the feather-free body. 6. The rate of maturing of feathers in females was higher than in males (0.0526 vs. 0398/d) and the mature weight was lower (205 vs. 266 g), respectively. Mature body weights of broilers in this trial were considerably higher than those measured using the same protocol 24 years ago, whereas rates of maturing remained the same.
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spelling A description of the potential growth and body composition of two commercial broiler strainsBody lipidbody proteinCobb 500 MXfeathersrate of maturingRoss 308 AP1. The potential growth of feathers and feather-free body and their chemical components was measured in two commercial broiler strains. 2. A total of 200 chicks of each sex x strain were fed adequate amounts of dietary protein using a four-phase feeding programme. Ten birds per genotype were sampled at 14, 28, 42, 56, 70, 84, 98 and 112 d of age. They were weighed before and after being dry-plucked to determine the weight of feathers, and the feather-free body was then minced and analysed for water, protein and lipid. 3. Body weights and chemical composition of males of the two strains were similar throughout the trial. Females of the two strains differed only in their body lipid contents, with mature Cobb females being higher than Ross (1371 vs. 1210 g). 4. Mature body weights of males and females from both strains averaged 8420 g and 6650 g; mature body protein weights averaged 1555 g and 1030 g; and mature body lipid contents averaged 908 and 1290 g, respectively. 5. Rates of maturing per day of body weights of males and females of both strains averaged 0.0385 and 0.0368; feather-free body protein was 0.0316 and 0.0348 and body lipid was 0.0503 and 0.0375, respectively. The rates for body lipid differed between Cobb and Ross females (0.0352 vs. 0.0397/d). Separate equations were required for males and females to describe the allometric relationship between lipid and protein in the feather-free body. 6. The rate of maturing of feathers in females was higher than in males (0.0526 vs. 0398/d) and the mature weight was lower (205 vs. 266 g), respectively. Mature body weights of broilers in this trial were considerably higher than those measured using the same protocol 24 years ago, whereas rates of maturing remained the same.Departamento de Zootecnia da FCAV-UNESP Universidade Estadual Paulista Júlio de Mesquita FilhoFaculdade de Ciências Agrárias e Veterinárias Departamento de Zootecnia da FCAV-UNESP Universidade Estadual PaulistaFaculdade de Ciencias Agrarias e Veterinarias Campus de Jaboticabal Universidade Estadual Paulista Julio de Mesquita FilhoAnimal and Poultry Science University of KwaZulu-NatalDepartamento de Zootecnia da FCAV-UNESP Universidade Estadual Paulista Júlio de Mesquita FilhoFaculdade de Ciências Agrárias e Veterinárias Departamento de Zootecnia da FCAV-UNESP Universidade Estadual PaulistaFaculdade de Ciencias Agrarias e Veterinarias Campus de Jaboticabal Universidade Estadual Paulista Julio de Mesquita FilhoUniversidade Estadual Paulista (Unesp)University of KwaZulu-NatalVargas, L. [UNESP]Sakomura, N. K. [UNESP]Leme, B. B. [UNESP]Antayhua, F. [UNESP]Reis, M. [UNESP]Gous, R.Fisher, C.2020-12-12T01:56:43Z2020-12-12T01:56:43Z2020-05-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article266-273http://dx.doi.org/10.1080/00071668.2020.1716300British Poultry Science, v. 61, n. 3, p. 266-273, 2020.1466-17990007-1668http://hdl.handle.net/11449/20006510.1080/00071668.2020.17163002-s2.0-85079391342Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBritish Poultry Scienceinfo:eu-repo/semantics/openAccess2024-06-07T18:41:31Zoai:repositorio.unesp.br:11449/200065Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:04:34.797493Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv A description of the potential growth and body composition of two commercial broiler strains
title A description of the potential growth and body composition of two commercial broiler strains
spellingShingle A description of the potential growth and body composition of two commercial broiler strains
Vargas, L. [UNESP]
Body lipid
body protein
Cobb 500 MX
feathers
rate of maturing
Ross 308 AP
title_short A description of the potential growth and body composition of two commercial broiler strains
title_full A description of the potential growth and body composition of two commercial broiler strains
title_fullStr A description of the potential growth and body composition of two commercial broiler strains
title_full_unstemmed A description of the potential growth and body composition of two commercial broiler strains
title_sort A description of the potential growth and body composition of two commercial broiler strains
author Vargas, L. [UNESP]
author_facet Vargas, L. [UNESP]
Sakomura, N. K. [UNESP]
Leme, B. B. [UNESP]
Antayhua, F. [UNESP]
Reis, M. [UNESP]
Gous, R.
Fisher, C.
author_role author
author2 Sakomura, N. K. [UNESP]
Leme, B. B. [UNESP]
Antayhua, F. [UNESP]
Reis, M. [UNESP]
Gous, R.
Fisher, C.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
University of KwaZulu-Natal
dc.contributor.author.fl_str_mv Vargas, L. [UNESP]
Sakomura, N. K. [UNESP]
Leme, B. B. [UNESP]
Antayhua, F. [UNESP]
Reis, M. [UNESP]
Gous, R.
Fisher, C.
dc.subject.por.fl_str_mv Body lipid
body protein
Cobb 500 MX
feathers
rate of maturing
Ross 308 AP
topic Body lipid
body protein
Cobb 500 MX
feathers
rate of maturing
Ross 308 AP
description 1. The potential growth of feathers and feather-free body and their chemical components was measured in two commercial broiler strains. 2. A total of 200 chicks of each sex x strain were fed adequate amounts of dietary protein using a four-phase feeding programme. Ten birds per genotype were sampled at 14, 28, 42, 56, 70, 84, 98 and 112 d of age. They were weighed before and after being dry-plucked to determine the weight of feathers, and the feather-free body was then minced and analysed for water, protein and lipid. 3. Body weights and chemical composition of males of the two strains were similar throughout the trial. Females of the two strains differed only in their body lipid contents, with mature Cobb females being higher than Ross (1371 vs. 1210 g). 4. Mature body weights of males and females from both strains averaged 8420 g and 6650 g; mature body protein weights averaged 1555 g and 1030 g; and mature body lipid contents averaged 908 and 1290 g, respectively. 5. Rates of maturing per day of body weights of males and females of both strains averaged 0.0385 and 0.0368; feather-free body protein was 0.0316 and 0.0348 and body lipid was 0.0503 and 0.0375, respectively. The rates for body lipid differed between Cobb and Ross females (0.0352 vs. 0.0397/d). Separate equations were required for males and females to describe the allometric relationship between lipid and protein in the feather-free body. 6. The rate of maturing of feathers in females was higher than in males (0.0526 vs. 0398/d) and the mature weight was lower (205 vs. 266 g), respectively. Mature body weights of broilers in this trial were considerably higher than those measured using the same protocol 24 years ago, whereas rates of maturing remained the same.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-12T01:56:43Z
2020-12-12T01:56:43Z
2020-05-03
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/10.1080/00071668.2020.1716300
British Poultry Science, v. 61, n. 3, p. 266-273, 2020.
1466-1799
0007-1668
http://hdl.handle.net/11449/200065
10.1080/00071668.2020.1716300
2-s2.0-85079391342
url http://dx.doi.org/10.1080/00071668.2020.1716300
http://hdl.handle.net/11449/200065
identifier_str_mv British Poultry Science, v. 61, n. 3, p. 266-273, 2020.
1466-1799
0007-1668
10.1080/00071668.2020.1716300
2-s2.0-85079391342
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv British Poultry Science
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 266-273
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_ 1808128890058571776