Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300197 |
Resumo: | ABSTRACT: This study was carried out to determine the combining effects of feeding up to 15 mg kg−1 ractopamine (RAC) to physically castrated (PC) pigs or those injected with an anti-GnRF vaccine (IC), on growth performance during suckling, weaning, growing and finishing phases. Out of a total of 1,160 male piglets, 50 % were surgically castrated at age 7, while 50 % underwent immunization against GnRF on the 103rd and 136th day of life. A completely randomized design, with two treatments (PC and IC), was used from the 1st until the 60th day of life. Afterwards, 792 animals, PC and IC, selected according to overall average weight (23.3 ± 0.69 kg) were allotted based on a completely randomized block design with a 2 × 4 factorial arrangement of treatments (castration categories × RAC levels) with 9 replications (11 animals) per main combination effect. IC growing pigs improved feed conversion due to lower average daily feed intake and higher average daily gain (ADG). During the finishing phase, both RAC and immunocastration increased body weight, but the effects were independent. RAC, on its own improved ADG and feed conversion. However, pigs fed 10 mg kg−1 RAC had higher blood lactate compared to those fed lower levels, suggesting that these animals were more susceptible to stress. Muscle depth was influenced only by RAC, whereas fat thickness was lower for IC. Lean meat increased and fat decreased in the shoulder and belly of IC; RAC had a positive effect on belly lean meat only. Either immunocastration or RAC inclusion (at least 5 mg kg−1) promoted muscle gain and fat reduction in pig carcass, adding value to pork. |
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Scientia Agrícola (Online) |
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Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigsβ-agonistscutting yieldlean meatstress parametersABSTRACT: This study was carried out to determine the combining effects of feeding up to 15 mg kg−1 ractopamine (RAC) to physically castrated (PC) pigs or those injected with an anti-GnRF vaccine (IC), on growth performance during suckling, weaning, growing and finishing phases. Out of a total of 1,160 male piglets, 50 % were surgically castrated at age 7, while 50 % underwent immunization against GnRF on the 103rd and 136th day of life. A completely randomized design, with two treatments (PC and IC), was used from the 1st until the 60th day of life. Afterwards, 792 animals, PC and IC, selected according to overall average weight (23.3 ± 0.69 kg) were allotted based on a completely randomized block design with a 2 × 4 factorial arrangement of treatments (castration categories × RAC levels) with 9 replications (11 animals) per main combination effect. IC growing pigs improved feed conversion due to lower average daily feed intake and higher average daily gain (ADG). During the finishing phase, both RAC and immunocastration increased body weight, but the effects were independent. RAC, on its own improved ADG and feed conversion. However, pigs fed 10 mg kg−1 RAC had higher blood lactate compared to those fed lower levels, suggesting that these animals were more susceptible to stress. Muscle depth was influenced only by RAC, whereas fat thickness was lower for IC. Lean meat increased and fat decreased in the shoulder and belly of IC; RAC had a positive effect on belly lean meat only. Either immunocastration or RAC inclusion (at least 5 mg kg−1) promoted muscle gain and fat reduction in pig carcass, adding value to pork.Escola Superior de Agricultura "Luiz de Queiroz"2018-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300197Scientia Agricola v.75 n.3 2018reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/1678-992x-2016-0321info:eu-repo/semantics/openAccessCosta,Osmar Antonio DallaFeddern,VivianAthayde,Natalia BortoletoManzke,Naiana EinhardtRoça,Roberto de OliveiraLopes,Letícia dos SantosLima,Gustavo Julio Mello Monteiro deeng2018-01-29T00:00:00Zoai:scielo:S0103-90162018000300197Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2018-01-29T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs |
title |
Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs |
spellingShingle |
Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs Costa,Osmar Antonio Dalla β-agonists cutting yield lean meat stress parameters |
title_short |
Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs |
title_full |
Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs |
title_fullStr |
Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs |
title_full_unstemmed |
Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs |
title_sort |
Ractopamine supplementation improves leanness and carcass yield, minimally affecting pork quality in immunocastrated pigs |
author |
Costa,Osmar Antonio Dalla |
author_facet |
Costa,Osmar Antonio Dalla Feddern,Vivian Athayde,Natalia Bortoleto Manzke,Naiana Einhardt Roça,Roberto de Oliveira Lopes,Letícia dos Santos Lima,Gustavo Julio Mello Monteiro de |
author_role |
author |
author2 |
Feddern,Vivian Athayde,Natalia Bortoleto Manzke,Naiana Einhardt Roça,Roberto de Oliveira Lopes,Letícia dos Santos Lima,Gustavo Julio Mello Monteiro de |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Costa,Osmar Antonio Dalla Feddern,Vivian Athayde,Natalia Bortoleto Manzke,Naiana Einhardt Roça,Roberto de Oliveira Lopes,Letícia dos Santos Lima,Gustavo Julio Mello Monteiro de |
dc.subject.por.fl_str_mv |
β-agonists cutting yield lean meat stress parameters |
topic |
β-agonists cutting yield lean meat stress parameters |
description |
ABSTRACT: This study was carried out to determine the combining effects of feeding up to 15 mg kg−1 ractopamine (RAC) to physically castrated (PC) pigs or those injected with an anti-GnRF vaccine (IC), on growth performance during suckling, weaning, growing and finishing phases. Out of a total of 1,160 male piglets, 50 % were surgically castrated at age 7, while 50 % underwent immunization against GnRF on the 103rd and 136th day of life. A completely randomized design, with two treatments (PC and IC), was used from the 1st until the 60th day of life. Afterwards, 792 animals, PC and IC, selected according to overall average weight (23.3 ± 0.69 kg) were allotted based on a completely randomized block design with a 2 × 4 factorial arrangement of treatments (castration categories × RAC levels) with 9 replications (11 animals) per main combination effect. IC growing pigs improved feed conversion due to lower average daily feed intake and higher average daily gain (ADG). During the finishing phase, both RAC and immunocastration increased body weight, but the effects were independent. RAC, on its own improved ADG and feed conversion. However, pigs fed 10 mg kg−1 RAC had higher blood lactate compared to those fed lower levels, suggesting that these animals were more susceptible to stress. Muscle depth was influenced only by RAC, whereas fat thickness was lower for IC. Lean meat increased and fat decreased in the shoulder and belly of IC; RAC had a positive effect on belly lean meat only. Either immunocastration or RAC inclusion (at least 5 mg kg−1) promoted muscle gain and fat reduction in pig carcass, adding value to pork. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-05-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300197 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300197 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1678-992x-2016-0321 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.75 n.3 2018 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936464702373888 |