Panic in free-range laying hens.
Panic in free-range laying hens.
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散养蛋鸡恐慌。
DOI：
10.1136/vr.100685
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Richards GJ
中科院分区：
文献类型：
--
作者：
Richards GJ
为了确定散养蛋鸡恐慌的原因，在2009年6月至2011年7月期间，对一个商业单位连续两个6000只散养鸡群进行了研究。将鸡圈养在4个相同的独立围栏中（1500只鸡/围栏）。使用CCTV设备对每个围栏拍摄24小时。观察鸡群后的结果显示，在两个连续的产蛋周期中观察到115次恐慌; 15%的恐慌被归类为“整个鸡群”，85%是局部的，只有少数鸡受到影响。在25周龄时观察到最高数量的恐慌，随着年龄的增长迅速下降。大多数恐慌发生在窝内或窝外。88%的恐慌来源不明。12%的人是由饲养员进行不寻常或不熟悉的行为引起的，而不是例行的散步和收集鸡蛋。
To determine the cause of panic in free range laying hens, two consecutive flocks of 6000 free-range birds on a commercial unit were studied between June 2009 and July 2011. Birds were housed in four identical, self contained pens (1500 birds/pen). Each pen was filmed for 24 hours using CCTV equipment. Results after observing the flocks showed 115 panics observed across two consecutive laying cycles; 15% of panics were classed as 'Whole flock' and 85% were localised with only a few birds affected. The highest number of panics were observed at 25 weeks of age, decreasing rapidly with age. The majority of panics were observed on the litter or outside. 88% of the panic were of unknown origin. 12 percent were provoked by stockmen carrying out unusual or unfamiliar behaviours, other than the routine walk through and egg collection.