The aversion of broiler chickens to concurrent vibrational and thermal stressors

Abeyesinghe, Siobhan; Wathes, C. M.; Nicol, CJ; Randall, J.M.

doi:10.1016/s0168-1591(01)00142-3

Cited by 53 publications

(43 citation statements)

References 36 publications

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“…sitting (Randall et al 1996), it is aversive (Randall et al 1997;Abeyesinghe et al 2001) and can increase body temperature (Warriss et al 1997). This extra metabolic heat would contribute to the thermal load experienced by broilers during transportation (Abeyesinghe et al 2001).…”

Section: Vehicle Motionmentioning

confidence: 99%

Injury and mortality in broilers during handling and transport to slaughter

Cockram

Dulal

2018

Can. J. Anim. Sci.

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Multiple factors affect the risk of broiler injury and mortality during loading, transport, and lairage. These include the physical and pathophysiological condition of broilers before loading and the type of handling procedures used. The external environmental conditions have a major influence on the risk of mortality. Combinations of high stocking density, insufficient ventilation, and high temperature and humidity pose a risk of hyperthermia. Combinations of wet conditions, cold temperature, and air movement, increase the risk of hypothermia. However, protection from cold and wet conditions involves the use of side protection that restricts the trailer ventilation that can cause heat and moisture to build up in the load, increasing the risk of hyperthermia. Modular systems reduce the risk of injury and facilitate unloading into a lairage where temperature and ventilation can be controlled. The duration of loading, transport, and lairage increases the mortality risk. Deaths can occur during each stage and interactions between the duration of the preslaughter stages, the thermal environment, fasting, ill-health, and injury can reduce the physiological capacity of the birds to maintain homoeostasis resulting in exhaustion and death. Quality control and action on the identified risk factors should reduce injury and mortality during preslaughter handling and transport.

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Section: Vehicle Motionmentioning

confidence: 99%

Injury and mortality in broilers during handling and transport to slaughter

Cockram

Dulal

2018

Can. J. Anim. Sci.

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“…The main consequences of this agent are related to stress and a drop in quality of broilers' meat transported for slaughter (Randall et al, 1993;Randall et al, 1997;Carlisle et al, 1998;Abeyesinghe et al, 2001), in addition to the loss of eggs for human consumption and/or hatching, as a result of cracks, breaks and changes in internal quality (Berardinelli et al, 2003a(Berardinelli et al, , 2003bTorma and Kovácsné, 2012;Nazareno et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Mechanical vibrations in the transport of hatching eggs and the losses caused in the hatch and quality of broiler chicks

Donofre

Silva

Nazareno

et al. 2017

J Agricult Engineer

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Many factors present in eggs' transportation from incubator to growing confinements can damage their integrity and, consequently, the results of the incubation. This study aimed to evaluate whether the intensity and duration of exposures of hatching eggs to mechanical vibrations were capable of affecting the hatch and the quality of broiler chicks. Four treatments, determined by two intensities of vibrations and two durations of exposures were evaluated and compared with a control group in a randomised design in blocks with four repetitions. The vibrations were applied by a mechanical shaker before incubation. Then the eggs were incubated and as the following responses were evaluated: hatchability, the type of embryonic mortality, the quality of the birds and the total of losses. The analyses were carried out by a binomial regression model, with application of the Wald test at 5% significance level. The results showed that the exposure of eggs to mechanical vibrations harmfully affects the hatchability and reduces the ratio (percentage) of high quality chicks. Highest vibration level together with longer duration of exposure resulted in worst hatchability and losses. It is argued that the mechanical vibrations are potentially damaging and should be regarded as an important factor in the management of hatching eggs.

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“…O regime de confinamento causa estresse intenso (Jones & Mills, 1999), tendo como conseqüência respostas fisiológicas e comportamentais (Marin et al, 2001) que podem causar sérios problemas à saúde e bem-estar dos animais (Abeyesinghe et al, 2001;Hall, 2001;Mendl, 1999). Por estes motivos o sistema de criação semi-intensivo é considerado como uma alternativa.…”

Section: Introductionunclassified

Influência do sistema de criação sobre o desempenho, a condição fisiológica e o comportamento de linhagens de frangos para corte

et al. 2003

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RESUMO -Realizou-se o presente trabalho com o intuito de avaliar a influência do sistema de criação (intensivo e semi-intensivo) no desempenho (peso corporal e conversão alimentar), na condição fisiológica sob estresse térmico (temperatura retal, freqüência respiratória e hematócrito) e comportamento (freqüência ao pasto) de frangos de corte. Foram utilizadas quatro linhagens de frangos de corte, duas tipo caipira e duas comerciais. Para avaliação do desempenho e condição fisiológica das aves nas idades de 45, 55, 65 e 75 dias, instalou-se um experimento no qual as aves foram alojadas em boxes constituídos de 4,5 m 2 de área interna (abrigo) e 35 m 2 de área de pastejo com lotação de 35 aves/box. Outro experimento foi instalado para avaliação da freqüência das aves ao pasto entre o 35 o e 75 o dia de idade. Uma das linhagens avaliadas não demonstrou ser adaptada ao sistema semi-intensivo de criação. Verificaram-se diferenças significativas nos parâmetros de desempenho e de condição fisiológica das aves nos dois sistemas. Na criação semi-intensiva obtiveramse menores valores para temperatura retal, taxa respiratória e hematócrito e melhores valores de peso corporal e conversão alimentar. Concluiu-se que a criação semi-intensiva proporcionou condições que aumentaram o bem-estar das aves, tendo influenciado positivamente o desempenho e a condição fisiológica das linhagens avaliadas, mesmo sob condições de estresse térmico.Palavras-chave: adaptação, bem-estar, comportamento, sistema semi-intensivo Influence of the Rearing System on Performance, Physiological Condition and Behaviour of Broilers LinesABSTRACT -The objectives of this research were to evaluate the influence of rearing systems (intensive or semi-intensive) on the performance (body weight and feed efficiency), chicken physiological condition under heat stress (rectal temperature, respiratory frequency and hematocrit) and behavioural parameters (frequency in the pasture areas) of broilers lines. To evaluate broiler's performance and physiological condition on the ages of 45, 55, 65 and 75 days one experiment was carried out in boxes with 4,5 m 2 of inside area and 35 m 2 of outside area were 35 broilers were reared in each box. Another experiment was carried out to evaluate the frequency of broilers it the pasture areas from 35 to 75 days of age. One of the evaluated lines did not show adaptation to the semi-intensive rearing system. Significant differences were found in broilers performance and physiological conditions in both systems. In the semi-intensive rearing system the rectal temperature, respiratory frequency, hematocrit and feed efficiency were smaller and body weight larger than in the intensive rearing system. It was concluded that the semi-intensive rearing system provided conditions that increased broilers welfare and positively influenced the physiological conditions and performance of the broilers.

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The aversion of broiler chickens to concurrent vibrational and thermal stressors

Cited by 53 publications

References 36 publications

Injury and mortality in broilers during handling and transport to slaughter

Injury and mortality in broilers during handling and transport to slaughter

Mechanical vibrations in the transport of hatching eggs and the losses caused in the hatch and quality of broiler chicks

Influência do sistema de criação sobre o desempenho, a condição fisiológica e o comportamento de linhagens de frangos para corte

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