Field evaluation of broiler gait score using different sampling methods
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/11678 |
Resumo: | Brazil is today the world's largest broiler meat exporter; however, in order to keep this position, it must comply with welfare regulations while maintaining low production costs. Locomotion problems restrain bird movements, limiting their access to drinking and feeding equipment, and therefore their survival and productivity. The objective of this study was to evaluate locomotion deficiency in broiler chickens reared under stressful temperature conditions using three different sampling methods of birds from three different ages. The experiment consisted in determining the gait score of 28, 35, 42 and 49-day-old broilers using three different known gait scoring methods: M1, birds were randomly selected, enclosed in a circle, and then stimulated to walk out of the circle; M2, ten birds were randomly selected and gait scored; and M3, birds were randomly selected, enclosed in a circle, and then observed while walking away from the circle without stimulus to walking. Environmental temperature, relative humidity, and light intensity inside the poultry houses were recorded. No evidence of interaction between scoring method and age was found however, both method and age influenced gait score. Gait score was found to be lower at 28 days of age. The evaluation using the ten randomly selected birds within the house was the method that presented the less reliable results. Gait score results when birds were stimulated to walk were lower than when they were not simulated, independently of age. The gait scores obtained with the three tested methods and ages were higher than those considered acceptable. The highest frequency of normal gait score (0) represented 50% of the flock. These results may be related to heat stress during rearing. Average gait score incresead with average ambient temperature, relative humidity, and light intensity. The evaluation of gait score to detect locomotion problems of broilers under rearing conditions seems subjective and difficult to be properly performed. |
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Field evaluation of broiler gait score using different sampling methodsAnimal welfareEnvironmental rearing conditionsLocomotion deficiencyBrazil is today the world's largest broiler meat exporter; however, in order to keep this position, it must comply with welfare regulations while maintaining low production costs. Locomotion problems restrain bird movements, limiting their access to drinking and feeding equipment, and therefore their survival and productivity. The objective of this study was to evaluate locomotion deficiency in broiler chickens reared under stressful temperature conditions using three different sampling methods of birds from three different ages. The experiment consisted in determining the gait score of 28, 35, 42 and 49-day-old broilers using three different known gait scoring methods: M1, birds were randomly selected, enclosed in a circle, and then stimulated to walk out of the circle; M2, ten birds were randomly selected and gait scored; and M3, birds were randomly selected, enclosed in a circle, and then observed while walking away from the circle without stimulus to walking. Environmental temperature, relative humidity, and light intensity inside the poultry houses were recorded. No evidence of interaction between scoring method and age was found however, both method and age influenced gait score. Gait score was found to be lower at 28 days of age. The evaluation using the ten randomly selected birds within the house was the method that presented the less reliable results. Gait score results when birds were stimulated to walk were lower than when they were not simulated, independently of age. The gait scores obtained with the three tested methods and ages were higher than those considered acceptable. The highest frequency of normal gait score (0) represented 50% of the flock. These results may be related to heat stress during rearing. Average gait score incresead with average ambient temperature, relative humidity, and light intensity. The evaluation of gait score to detect locomotion problems of broilers under rearing conditions seems subjective and difficult to be properly performed.Fundação APINCO de Ciência e Tecnologia Avícolas2016-08-23T20:30:44Z2016-08-23T20:30:44Z2009info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfCORDEIRO, A. F. da S.; NAAS, I. de A.; SALGADO, D. D. Field evaluation of broiler gait score using different sampling methods. Revista Brasileira de Ciência Avícola, Campinas, v. 11, n. 3, p. 149-154.http://repositorio.ufla.br/jspui/handle/1/11678Revista Brasileira de Ciência Avícolareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLACordeiro, Alexandra Ferreira da SilvaNaas, Irenilza de AlencarSalgado, Douglas D'Alessandroinfo:eu-repo/semantics/openAccesseng2023-05-03T11:26:48Zoai:localhost:1/11678Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2023-05-03T11:26:48Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Field evaluation of broiler gait score using different sampling methods |
title |
Field evaluation of broiler gait score using different sampling methods |
spellingShingle |
Field evaluation of broiler gait score using different sampling methods Cordeiro, Alexandra Ferreira da Silva Animal welfare Environmental rearing conditions Locomotion deficiency |
title_short |
Field evaluation of broiler gait score using different sampling methods |
title_full |
Field evaluation of broiler gait score using different sampling methods |
title_fullStr |
Field evaluation of broiler gait score using different sampling methods |
title_full_unstemmed |
Field evaluation of broiler gait score using different sampling methods |
title_sort |
Field evaluation of broiler gait score using different sampling methods |
author |
Cordeiro, Alexandra Ferreira da Silva |
author_facet |
Cordeiro, Alexandra Ferreira da Silva Naas, Irenilza de Alencar Salgado, Douglas D'Alessandro |
author_role |
author |
author2 |
Naas, Irenilza de Alencar Salgado, Douglas D'Alessandro |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Cordeiro, Alexandra Ferreira da Silva Naas, Irenilza de Alencar Salgado, Douglas D'Alessandro |
dc.subject.por.fl_str_mv |
Animal welfare Environmental rearing conditions Locomotion deficiency |
topic |
Animal welfare Environmental rearing conditions Locomotion deficiency |
description |
Brazil is today the world's largest broiler meat exporter; however, in order to keep this position, it must comply with welfare regulations while maintaining low production costs. Locomotion problems restrain bird movements, limiting their access to drinking and feeding equipment, and therefore their survival and productivity. The objective of this study was to evaluate locomotion deficiency in broiler chickens reared under stressful temperature conditions using three different sampling methods of birds from three different ages. The experiment consisted in determining the gait score of 28, 35, 42 and 49-day-old broilers using three different known gait scoring methods: M1, birds were randomly selected, enclosed in a circle, and then stimulated to walk out of the circle; M2, ten birds were randomly selected and gait scored; and M3, birds were randomly selected, enclosed in a circle, and then observed while walking away from the circle without stimulus to walking. Environmental temperature, relative humidity, and light intensity inside the poultry houses were recorded. No evidence of interaction between scoring method and age was found however, both method and age influenced gait score. Gait score was found to be lower at 28 days of age. The evaluation using the ten randomly selected birds within the house was the method that presented the less reliable results. Gait score results when birds were stimulated to walk were lower than when they were not simulated, independently of age. The gait scores obtained with the three tested methods and ages were higher than those considered acceptable. The highest frequency of normal gait score (0) represented 50% of the flock. These results may be related to heat stress during rearing. Average gait score incresead with average ambient temperature, relative humidity, and light intensity. The evaluation of gait score to detect locomotion problems of broilers under rearing conditions seems subjective and difficult to be properly performed. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009 2016-08-23T20:30:44Z 2016-08-23T20:30:44Z |
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 |
CORDEIRO, A. F. da S.; NAAS, I. de A.; SALGADO, D. D. Field evaluation of broiler gait score using different sampling methods. Revista Brasileira de Ciência Avícola, Campinas, v. 11, n. 3, p. 149-154. http://repositorio.ufla.br/jspui/handle/1/11678 |
identifier_str_mv |
CORDEIRO, A. F. da S.; NAAS, I. de A.; SALGADO, D. D. Field evaluation of broiler gait score using different sampling methods. Revista Brasileira de Ciência Avícola, Campinas, v. 11, n. 3, p. 149-154. |
url |
http://repositorio.ufla.br/jspui/handle/1/11678 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
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 |
Revista Brasileira de Ciência Avícola reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1807835149007585280 |