Modification of aviary design reduces incidence of falls, collisions and keel bone damage in laying hens
Modification of aviary design reduces incidence of falls, collisions and keel bone damage in laying hens
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DOI：
10.1016/j.applanim.2015.01.012
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发表时间：
2015-04-01
影响因子：
2.3
通讯作者：
Toscano, Michael Jeffrey
中科院分区：
文献类型：
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作者：
Stratmann, Ariane;Froehlich, Ernst Konrad Friederich;Toscano, Michael Jeffrey
鸟舍等产蛋母鸡的非笼养系统为进行物种特异性行为提供了更大的自由度，因此被认为可以改善鸟类的福利;然而，鸟舍与龙骨损伤（骨折和偏差）的高患病率相关，这是商业产蛋母鸡的主要福利问题。龙骨损坏的潜在原因是福尔斯和碰撞的内部住房结构之间发生的鸟类层或栖息在鸟舍。本研究的目的是调查通过修改禽舍设计来减少福尔斯和碰撞，从而减少龙骨损伤的范围。将鸡饲养在蛋鸡舍的20个围栏中（每个围栏225只母鸡），分配给4个不同的处理（每个处理组n=5个围栏），包括（1）对照围栏和通过添加（2）栖息物、（3）平台和（4）斜坡而改良的围栏。在19，22，29，36和43周龄的视频记录被用来分析控制运动和福尔斯（包括碰撞的发生，跌倒的原因，跌倒的高度和跌倒后的行为的细节）在过渡黄昏和随后的黑暗阶段。在18、20、23、30、37、44、52和60周龄时，使用20只病灶母鸡/围栏进行触诊评估（重点是骨折和偏离）。与对照组相比，我们发现坡道中的控制运动增加了44%（P=0.003），平台治疗中的控制运动增加了47%（P=0.014），福尔斯减少了45%（P=0.006），碰撞减少了59%（P
Non-cage housing systems for laying hens such as aviaries provide greater freedom to perform species-specific behavior and thus are thought to improve welfare of the birds; however, aviaries are associated with a high prevalence of keel bone damage (fractures and deviations), which is a major welfare problem in commercial laying hens. Potential causes of keel bone damage are falls and collisions with internal housing structures that occur as birds move between tiers or perches in the aviary. The aim of this study was to investigate the scope for reducing keel bone damage by reducing falls and collisions through modifications of aviary design. Birds were kept in 20 pens in a laying hen house (225 hens per pen) that were assigned to four different treatments (n=5 pens per treatment group) including (1) control pens and pens modified by the addition of (2) perches, (3) platforms and (4) ramps. Video recordings at 19, 22, 29, 36 and 43 weeks of age were used to analyze controlled movements and falls (including details on occurrence of collision, cause of fall, height of fall and behavior after fall) during the transitional dusk and subsequent dark phase. Palpation assessments (focusing on fractures and deviations) using 20 focal hens per pen were conducted at 18, 20, 23, 30, 37, 44, 52 and 60 weeks of age. In comparison to the control group, we found 44% more controlled movements in the ramp (P=0.003) and 47% more controlled movements in the platform treatments (P=0.014) as well as 45% fewer falls (P=0.006) and 59% fewer collisions (P