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Assessing locomotion deficiency in broiler chicken

Locomotion deficiencies in broiler production cause poor welfare and lead to change in drinking and feeding behavior with consequent loss in weight gain. This research aimed to assess locomotion deficiencies in broiler chicken by analyzing the vertical peak force on both feet during walk. A chamber...

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Bibliographic Details
Published in:Scientia agricola 2010-04, Vol.67 (2), p.129-135
Main Authors: Nääs, Irenilza de Alencar(UNICAMP FEAGRI), Paz, Ibiara Correia de Lima Almeida(UFGD FCA), Baracho, Marta dos Santos(UNICAMP FEAGRI), Menezes, Adriana Gomes de(UNICAMP FEAGRI Programa de Pós Graduação em Engenharia Agrícola), Lima, Karla Andrea Oliveira de(UNICAMP FEAGRI Programa de Pós Graduação em Engenharia Agrícola), Bueno, Leda Gobbo de Freitas(UNICAMP FEAGRI Programa de Pós Graduação em Engenharia Agrícola), Mollo Neto, Mario(UNIP EP), Carvalho, Victor Ciaco de(UNICAMP FEAGRI), Almeida, Ianê Correia de Lima(UNESP FMVZ), Souza, Anderson Luiz de(UNICAMP FEAGRI)
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Language:English
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Summary:Locomotion deficiencies in broiler production cause poor welfare and lead to change in drinking and feeding behavior with consequent loss in weight gain. This research aimed to assess locomotion deficiencies in broiler chicken by analyzing the vertical peak force on both feet during walk. A chamber was built with an inlet ramp, a horizontal walkway in the middle and an outlet ramp. In the walkway a thin mat with piezoelectric crystal sensors was placed to record the step vertical peak force of the feet while walking on the force platform. The measurement system consisted of a mat with electronic sensors and software that allowed real time recording of the forces and the processing and analysis of data. Footage was taken from two digital video cameras and used for gait scoring. Forty male broilers were chosen at random, grown under similar rearing conditions and farms, with age varying from 49 to 28 days (ten birds of same age) to be used in the trial. Measurement consisted of inducing the bird to walk on the force platform which automatically registered the peak vertical force of the steps. Results showed that the gait score increased with the weight and age of the birds. Peak force asymmetry was found for each foot, independent of age or gait score. Although not identified visually in the broilers, the peak vertical force values differed in both right and left feet leading to slow and uneven walking. Walking deficiency was more severe in older birds. Deficiência em locomoção é hoje um dos problemas mais importantes na produção de frangos de corte. É causa de baixo bem-estar e leva a alteração no comportamento de bebida e alimentação, com conseqüente perda de ganho de peso. Mediram-se deficiências locomotoras em frango de corte por meio da análise do pico de força plantar vertical em ambas as patas, durante a caminhada. Foi construída uma câmara com uma rampa de entrada, uma área horizontal de passagem e uma rampa de saída. Na parte horizontal da área de passagem foi colocado um tapete fino, com elementos sensores de cristal piezoelétrico, para registrar o pico de força vertical das patas do frango quando este caminhava sobre a plataforma. O sistema de mensuração consistiu de um tapete com sensores eletrônicos e um programa computacional que permitiu o registro de forças em tempo real e o processamento e a análise de dados. Imagens de vídeo foram tomadas a partir de duas câmeras digitais para atribuir o gait score. Quarenta frangos machos foram aleatoriame
ISSN:0103-9016
1678-992X
1678-992X
0103-9016
DOI:10.1590/s0103-90162010000200001