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首页> 外文期刊>Animal Welfare >The development of fault bars in domestic chickens (Gallus gallus domesticus) increases with acute stressors and individual propensity: implications for animal welfare
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The development of fault bars in domestic chickens (Gallus gallus domesticus) increases with acute stressors and individual propensity: implications for animal welfare

机译：国内鸡（Gallus Gallus Gamesolus）的断层杆的发展随着急性压力的增加和个人倾向：对动物福利的影响

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Negative experiences during feather growth can result in fault bar formation. Fault bars are malformations perpendicular to the rachis of the feather caused by stressful experiences during feather growth. However, there are little data on the causal effect of psychological stress on the formation of fault bars in chickens. The objective of this study was to examine the effect of acute stress in domestic chickens (Gallus gallus domesticus) on fault bar formation to validate this measure as a welfare indicator. Thirty broiler breeder pullets were housed in six cages at 21 days of age. Three cages were exposed to an acute stress protocol while the other three were the unstressed control. Feathers were marked as close as possible to the growing follicle at 21 (wing feathers) and 60 (all feathers) days of age. Acute stress came in the form of three procedures (unpredictable feed delivery, induction of tonic immobility, and crowding) repeated twice, 3-8 days apart and randomly, from 28 to 60 days of age. Wing, tail, and cover feathers were removed and measured at 60 days of age for weight, length, and number of fault bars. Exposure to acute, unpredictable stress increased the number of fault bars in wing feathers of chicks with a high number of initial fault bars. Feather growth decreased for the stressed group compared to the control. These results suggest that feather traits, including fault bars and feather growth, can be used as indicators of negative welfare in chickens.
机译：羽毛生长期间的负面经验可能导致故障栏形成。故障栏是垂直于羽毛痛苦的羽毛轴的畸形，这在羽毛生长期间造成的压力经历。然而，关于心理压力对鸡中断裂杆形成的因果效应的数据很少。本研究的目的是研究急性胁迫在国内鸡（Gallus Gallus Domesticus）对故障栏形成的影响，以验证这一措施作为福利指标。三十肉鸡饲养员在21天的六个笼子里举行。将三个笼暴露于急性应激协议，而另外三个是无重应的对照。羽毛标记为尽可能靠近21（翼羽毛）和60天（所有羽毛）时代的卵泡。急性压力以三个程序（不可预测的饲料递送，诱导滋补侵犯，挤压）的形式进行了两次，分开和随机，从28至60天开始重复两次。翼，尾和覆盖羽毛被移除，并在60天时测量的重量，长度和故障杆的数量。暴露于急性，不可预测的压力增加了大量初始故障杆的鸡翼羽毛中的断层杆的数量。与对照相比，压力组的羽毛增长降低。这些结果表明，羽毛特征，包括故障栏和羽毛增长，可用作鸡中负福利指标。

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