Behavior of white leghorn laying hens after withdrawal of feed
Behavior of white leghorn laying hens after withdrawal of feed
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DOI：
10.1093/ps/79.2.192
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发表时间：
2000-02-01
期刊：
影响因子：
4.4
通讯作者：
Webster, AB
中科院分区：
文献类型：
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作者：
Webster, AB
为了接近商业诱导的蜕皮，从Hy-Line W-36母鸡（65周龄）中取出饲料（FW），直到它们失去其初始体重的35%。在FW第1 ~ 3、8 ~ 10和19 ~ 21天，当FW母鸡达到15%、25%和35%体重损失时，对36只FW母鸡和36只对照母鸡的行为进行视频记录。然后给FW母鸡饲喂小母鸡生长日粮，直至FW开始后第28天，然后为它们提供蛋鸡日粮。第二周期生产的FW母鸡40周后蜕皮开始平均15.5打鸡蛋/母鸡圈养。FW母鸡表现出增加攻击的第一天的FW，也许表明挫折，然后表现出增加站立，头部运动，和非营养性啄食的第2天，然后减少这些行动的第3天。在FW期的第8 - 10天和第19 - 21天，分别观察到24%和40%的FW母鸡的休息行为。在整个FW期间，FW母鸡的非营养性啄食率高于对照母鸡。在第8 - 10天，FW母鸡的梳理更为频繁，可能是由于在第11天开始的羽毛推出开始附近的皮肤敏感性。在停饲期间的行为与身体储备的保护是一致的，但FW母鸡从未失去他们的警觉性和反应能力。研究期间，FW母鸡的死亡率显著低于对照母鸡（分别为2%和12%）。
To approximate a commercially induced molt, feed was withdrawn (FW) from Hy-Line W-36 hens (65-wk-old) until they lost 35% of their initial body weight. Behaviors of 36 FW hens and 36 control hens were videorecorded on Days 1 to 3, 8 to 10, and 19 to 21 of FW, when FW hens reached 15, 25, and 35% body weight loss. The FW hens then were fed a pullet grower ration until Day 28 after the start of FW, whereupon they were provided a layer ration. Second cycle production of FW hens to 40 wk postmolt initiation averaged 15.5 dozen eggs/hen housed. The FW hens manifested increased aggression on the first d of FW, perhaps indicative of frustration, and then exhibited increased standing, head movement, and nonnutritive pecking on Day 2, followed by reduction of these actions on Day 3. Resting behavior was observed 24 and 40% of the time for FW hens on Days 8 to 10 and 19 to 21 of the FW period, respectively. Nonnutritive pecking was higher for FW hens than for control hens throughout the FW period. Preening was more frequent for FW hens on Days 8 to 10, probably due to skin sensitivity near the start of feather push out, which began on Day 11. Behavior during the feed withdrawal period was consistent with conservation of bodily reserves, but FW hens never lost their capability for alertness and reactivity. The FW hens had significantly lower mortality during the study than control hens (2 vs 12%, respectively).