Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake
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 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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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 |
_version_ |
1813546575979347968 |