Buscar

 

RI UFLA (Universidade Federal de Lavras) >
DEG - Departamento de Engenharia >
DEG - Artigos publicados em periódicos >

Por favor, utilize esse identificador para citar este item ou usar como link: http://repositorio.ufla.br/jspui/handle/1/11678

Título: Field evaluation of broiler gait score using different sampling methods
Autor(es): Cordeiro, Alexandra Ferreira da Silva
Naas, Irenilza de Alencar
Salgado, Douglas D'Alessandro
Assunto: Animal welfare
Environmental rearing conditions
Locomotion deficiency
Publicador: Fundação APINCO de Ciência e Tecnologia Avícolas
Data de publicação: 2009
Referência: 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.
Abstract: 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.
URI: http://repositorio.ufla.br/jspui/handle/1/11678
Idioma: en_US
Aparece nas coleções: DEG - Artigos publicados em periódicos

Arquivos neste Item:

Arquivo Descrição TamanhoFormato
ARTIGO_Field evaluation of broiler gait score using different sampling methods.pdf651,58 kBAdobe PDFVer/abrir

Este item está licenciado com Licença Creative Commons
Creative Commons

Itens protegidos por copyright, com todos os direitos reservados, Salvo indicação em contrário.


Mostrar estatísticas

 


DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard - Feedback