Fear, anxiety, and production in laying hens with healed keel bone fractures.
Fear, anxiety, and production in laying hens with healed keel bone fractures.
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DOI：
10.1016/j.psj.2023.102514
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发表时间：
2023-04
期刊：
影响因子：
4.4
通讯作者：
Tarlton, J.
中科院分区：
文献类型：
--
作者：
Edgar, J. L.;Omi, Y.;Booth, F.;Mackie, N.;Richards, G.;Tarlton, J.
对于产蛋鸡，龙骨骨折（KF）的直接后果和愈合期的特点是执行物种特异性行为，获取资源和疼痛的能力降低。然而，一旦骨折完全愈合，长期影响就不那么清楚了。除了急性疼痛和行为变化外，负面体验还可以塑造未来对脓毒症威胁刺激的反应，增加未来的恐惧，以及与丈夫有关的事件中的焦虑水平。我们的目的是确定先前持续龙骨骨折的母鸡，但现在不在新骨折的高峰年龄范围内，与完整的母鸡相比，是否表现出更高的恐惧和焦虑水平。我们还确定了愈合的龙骨骨折是否与产量减少、行为改变和资源使用有关。从63周龄的商业农场中选择150只触诊评分为1（“KF”）的母鸡和150只触诊评分为0（无龙骨骨折，“KFF”）的母鸡，并分为6组（3 × KF和3 × KFF）饲养。我们比较了两组的生产（母鸡体重和饲料消耗，鸡蛋数量，质量和重量，地板鸡蛋，壳厚度和重量）和家庭围栏行为（行为和过渡运动）。最后，我们测量了KF（n = 75）和KFF（n = 75）在紧张性不动，新的竞技场，和新的对象测试。KF和KFF母鸡对强直性不动、新竞技场和新物体测试的反应没有差异，2组之间在家围栏行为和过渡运动方面也没有差异。与KF鸡相比，KFF鸡更轻，产蛋的蛋壳膜更少，但在任何其他生产措施中，KF和KFF之间没有发现任何差异。我们没有发现任何证据表明愈合的KFs与产蛋鸡的有害福利效应有关，但需要进一步的工作来确定较低体重和蛋壳膜的机制和影响。
For laying hens, the immediate aftermath and healing period of a keel fracture (KF) is characterized by reduced ability to perform species-specific behavior, access resources, and pain. However, the longer-term impacts, once the fracture is completely healed, are less clear. As well as acute pain and behavioral changes, a negative experience can shape future responses to putatively threatening stimuli, raising future fear, and anxiety levels during husbandry-related events. We aimed to determine whether hens that had previously sustained keel bone fractures, but were now outside of the peak age range for new fractures, showed higher fear and anxiety levels compared to intact hens. We also determined if healed keel bone fractures were associated with reduced production, changes in behavior and resource use. One hundred and fifty hens with a palpation score of 1 ( “KF”) and 150 hens with a palpation score of 0 (keel fracture free, “KFF”) were selected from a commercial farm at 63 wk of age and housed in 6 groups (3 × KF and 3 × KFF). We compared production (hen weight and feed consumption, egg quantity, quality and weight, floor eggs, shell thickness, and weight) and home pen behavior (behaviors and transitional movements) in both groups. Finally, we measured the responses of KF (n = 75) and KFF (n = 75) during tonic immobility, novel arena, and novel object tests. KF and KFF hens did not differ in their responses to the tonic immobility, novel arena, and novel object tests, nor were there differences between the 2 groups in home pen behavior and transitional movements. KFF birds were lighter and laid eggs with less eggshell membrane compared KF birds, but no differences were found between KF and KFF in any other production measures. We found no evidence that healed KFs were associated with detrimental welfare effects in laying hens, but further work is required to determine the mechanisms and implications of the lower body weight and egg shell membrane.
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影响因子：
3.7
作者：
Eusemann, Beryl Katharina;Baulain, Ulrich;Petow, Stefanie
通讯作者：
Petow, Stefanie
DOI：
10.3390/ani5040406
发表时间：
2015-11-27
期刊：
Animals : an open access journal from MDPI
影响因子：
--
作者：
Gebhardt-Henrich SG;Fröhlich EK
通讯作者：
Fröhlich EK
影响因子：
3.2
作者：
Riber AB;Casey-Trott TM;Herskin MS
通讯作者：
Herskin MS
影响因子：
1.7
作者：
Nasr, Mohammed A. F.;Nicol, Christine J.;Murrell, Joanna C.
通讯作者：
Murrell, Joanna C.
影响因子：
2.7
作者：
Parent, Alexandre J.;Beaudet, Nicolas;Gendron, Louis
通讯作者：
Gendron, Louis