Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake

Detalhes bibliográficos
Autor(a) principal: Pereira, M. C. S. [UNESP]
Data de Publicação: 2016
Outros Autores: Cruz, G. D., Arrigoni, M. D. B. [UNESP], Rigueiro, A. L. N. [UNESP], Silva, J. [UNESP], Carrara, T. V. B. [UNESP], Santos, P. C. S. [UNESP], Cursino, L. L. [UNESP], Millen, D. D. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.2527/jas2016-0579
http://hdl.handle.net/11449/165388
Resumo: The objective of this study was to examine the relationship of DMI fluctuation, feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics in Nellore cattle classified by residual feed intake (RFI). One experiment was conducted in 2 consecutive years using individual pens (1.0 x 7.0 m) at the Sao Paulo State University feedlot, Dracena campus, Brazil. The experiment in year 1 started in June of 2012 with forty-eight 20-mo-old Nellore yearling bulls with an initial BW of 358.2 +/- 19.4 kg. The experiment in year 2 started in January of 2013 with sixty 20-mo-old Nellore yearling bulls with an initial BW of 402.5 +/- 33.0 kg. Experiments in years 1 and 2 lasted 94 and 84 d, respectively. All yearling bulls were categorized as high RFI (>0.5 SD above the mean, n = 25), medium RFI (+/- 0.5 SD from the mean, n = 56), and low RFI (<0.5 SD below the mean, n = 27). Visual appraisal to collect behavior data was made on d 40 (finishing period) of both years. Yearling bulls were harvested when average across treatment groups achieved a fat thickness of 4 mm at the 12th rib. Low-RFI yearling bulls had lower daily DMI, expressed either in kilograms (P < 0.01) or as percentage of BW (P < 0.01), and improved G:F (P < 0.01) when compared to high-RFI animals. No differences were observed (P > 0.10) for ADG, final BW, or HCW among RFI groups. Also, low-RFI yearling bulls had thinner final 12th rib (P < 0.01) and biceps femoris (P8) fat thickness (P < 0.01). Low-RFI yearling bulls were slower to consume (P = 0.03) and ruminate (P < 0.01) 1 kg of either DM or NDF. No significant (P > 0.10) RFI effect was observed for any ruminal morphometrics variables evaluated, with the exception of papillae area, in which low-RFI Nellore yearling bulls tended to have smaller (P = 0.07) papillae area than medium-RFI animals. In general, low-RFI Nellore yearling bulls consumed more particles larger than 19 and 8 mm and had a similar performance when compared to both medium-and high-RFI bulls; however, carcass fat composition was negatively impacted.
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spelling Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intakecarcassfatfeedlotNelloreperformanceresidual feed intakeThe objective of this study was to examine the relationship of DMI fluctuation, feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics in Nellore cattle classified by residual feed intake (RFI). One experiment was conducted in 2 consecutive years using individual pens (1.0 x 7.0 m) at the Sao Paulo State University feedlot, Dracena campus, Brazil. The experiment in year 1 started in June of 2012 with forty-eight 20-mo-old Nellore yearling bulls with an initial BW of 358.2 +/- 19.4 kg. The experiment in year 2 started in January of 2013 with sixty 20-mo-old Nellore yearling bulls with an initial BW of 402.5 +/- 33.0 kg. Experiments in years 1 and 2 lasted 94 and 84 d, respectively. All yearling bulls were categorized as high RFI (>0.5 SD above the mean, n = 25), medium RFI (+/- 0.5 SD from the mean, n = 56), and low RFI (<0.5 SD below the mean, n = 27). Visual appraisal to collect behavior data was made on d 40 (finishing period) of both years. Yearling bulls were harvested when average across treatment groups achieved a fat thickness of 4 mm at the 12th rib. Low-RFI yearling bulls had lower daily DMI, expressed either in kilograms (P < 0.01) or as percentage of BW (P < 0.01), and improved G:F (P < 0.01) when compared to high-RFI animals. No differences were observed (P > 0.10) for ADG, final BW, or HCW among RFI groups. Also, low-RFI yearling bulls had thinner final 12th rib (P < 0.01) and biceps femoris (P8) fat thickness (P < 0.01). Low-RFI yearling bulls were slower to consume (P = 0.03) and ruminate (P < 0.01) 1 kg of either DM or NDF. No significant (P > 0.10) RFI effect was observed for any ruminal morphometrics variables evaluated, with the exception of papillae area, in which low-RFI Nellore yearling bulls tended to have smaller (P = 0.07) papillae area than medium-RFI animals. In general, low-RFI Nellore yearling bulls consumed more particles larger than 19 and 8 mm and had a similar performance when compared to both medium-and high-RFI bulls; however, carcass fat composition was negatively impacted.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Sao Paulo State Univ, Dept Breeding & Anim Nutr, BR-18618000 Botucatu, SP, BrazilPurina Anim Nutr LLC, Shoreview, MN 55126 USASao Paulo State Univ, Coll Technol & Agr Sci, BR-17900000 Dracena, SP, BrazilSao Paulo State Univ, Dept Breeding & Anim Nutr, BR-18618000 Botucatu, SP, BrazilSao Paulo State Univ, Coll Technol & Agr Sci, BR-17900000 Dracena, SP, BrazilAmer Soc Animal ScienceUniversidade Estadual Paulista (Unesp)Purina Anim Nutr LLCPereira, M. C. S. [UNESP]Cruz, G. D.Arrigoni, M. D. B. [UNESP]Rigueiro, A. L. N. [UNESP]Silva, J. [UNESP]Carrara, T. V. B. [UNESP]Santos, P. C. S. [UNESP]Cursino, L. L. [UNESP]Millen, D. D. [UNESP]2018-11-28T00:05:44Z2018-11-28T00:05:44Z2016-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article4287-4296application/pdfhttp://dx.doi.org/10.2527/jas2016-0579Journal Of Animal Science. Champaign: Amer Soc Animal Science, v. 94, n. 10, p. 4287-4296, 2016.0021-8812http://hdl.handle.net/11449/16538810.2527/jas2016-0579WOS:000388955400024WOS000388955400024.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Animal Science0,848info:eu-repo/semantics/openAccess2024-09-06T18:55:09Zoai:repositorio.unesp.br:11449/165388Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462024-09-06T18:55:09Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
title Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
spellingShingle Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
Pereira, M. C. S. [UNESP]
carcass
fat
feedlot
Nellore
performance
residual feed intake
title_short Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
title_full Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
title_fullStr Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
title_full_unstemmed Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
title_sort Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
author Pereira, M. C. S. [UNESP]
author_facet Pereira, M. C. S. [UNESP]
Cruz, G. D.
Arrigoni, M. D. B. [UNESP]
Rigueiro, A. L. N. [UNESP]
Silva, J. [UNESP]
Carrara, T. V. B. [UNESP]
Santos, P. C. S. [UNESP]
Cursino, L. L. [UNESP]
Millen, D. D. [UNESP]
author_role author
author2 Cruz, G. D.
Arrigoni, M. D. B. [UNESP]
Rigueiro, A. L. N. [UNESP]
Silva, J. [UNESP]
Carrara, T. V. B. [UNESP]
Santos, P. C. S. [UNESP]
Cursino, L. L. [UNESP]
Millen, D. D. [UNESP]
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Purina Anim Nutr LLC
dc.contributor.author.fl_str_mv Pereira, M. C. S. [UNESP]
Cruz, G. D.
Arrigoni, M. D. B. [UNESP]
Rigueiro, A. L. N. [UNESP]
Silva, J. [UNESP]
Carrara, T. V. B. [UNESP]
Santos, P. C. S. [UNESP]
Cursino, L. L. [UNESP]
Millen, D. D. [UNESP]
dc.subject.por.fl_str_mv carcass
fat
feedlot
Nellore
performance
residual feed intake
topic carcass
fat
feedlot
Nellore
performance
residual feed intake
description The objective of this study was to examine the relationship of DMI fluctuation, feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics in Nellore cattle classified by residual feed intake (RFI). One experiment was conducted in 2 consecutive years using individual pens (1.0 x 7.0 m) at the Sao Paulo State University feedlot, Dracena campus, Brazil. The experiment in year 1 started in June of 2012 with forty-eight 20-mo-old Nellore yearling bulls with an initial BW of 358.2 +/- 19.4 kg. The experiment in year 2 started in January of 2013 with sixty 20-mo-old Nellore yearling bulls with an initial BW of 402.5 +/- 33.0 kg. Experiments in years 1 and 2 lasted 94 and 84 d, respectively. All yearling bulls were categorized as high RFI (>0.5 SD above the mean, n = 25), medium RFI (+/- 0.5 SD from the mean, n = 56), and low RFI (<0.5 SD below the mean, n = 27). Visual appraisal to collect behavior data was made on d 40 (finishing period) of both years. Yearling bulls were harvested when average across treatment groups achieved a fat thickness of 4 mm at the 12th rib. Low-RFI yearling bulls had lower daily DMI, expressed either in kilograms (P < 0.01) or as percentage of BW (P < 0.01), and improved G:F (P < 0.01) when compared to high-RFI animals. No differences were observed (P > 0.10) for ADG, final BW, or HCW among RFI groups. Also, low-RFI yearling bulls had thinner final 12th rib (P < 0.01) and biceps femoris (P8) fat thickness (P < 0.01). Low-RFI yearling bulls were slower to consume (P = 0.03) and ruminate (P < 0.01) 1 kg of either DM or NDF. No significant (P > 0.10) RFI effect was observed for any ruminal morphometrics variables evaluated, with the exception of papillae area, in which low-RFI Nellore yearling bulls tended to have smaller (P = 0.07) papillae area than medium-RFI animals. In general, low-RFI Nellore yearling bulls consumed more particles larger than 19 and 8 mm and had a similar performance when compared to both medium-and high-RFI bulls; however, carcass fat composition was negatively impacted.
publishDate 2016
dc.date.none.fl_str_mv 2016-10-01
2018-11-28T00:05:44Z
2018-11-28T00:05:44Z
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/10.2527/jas2016-0579
Journal Of Animal Science. Champaign: Amer Soc Animal Science, v. 94, n. 10, p. 4287-4296, 2016.
0021-8812
http://hdl.handle.net/11449/165388
10.2527/jas2016-0579
WOS:000388955400024
WOS000388955400024.pdf
url http://dx.doi.org/10.2527/jas2016-0579
http://hdl.handle.net/11449/165388
identifier_str_mv Journal Of Animal Science. Champaign: Amer Soc Animal Science, v. 94, n. 10, p. 4287-4296, 2016.
0021-8812
10.2527/jas2016-0579
WOS:000388955400024
WOS000388955400024.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal Of Animal Science
0,848
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 4287-4296
application/pdf
dc.publisher.none.fl_str_mv Amer Soc Animal Science
publisher.none.fl_str_mv Amer Soc Animal Science
dc.source.none.fl_str_mv Web of Science
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 repositoriounesp@unesp.br
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