Early Onset of Laying and Bumblefoot Favor Keel Bone Fractures.
Early Onset of Laying and Bumblefoot Favor Keel Bone Fractures.
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DOI：
10.3390/ani5040406
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发表时间：
2015-11-27
期刊：
影响因子：
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通讯作者：
Fröhlich EK
中科院分区：
文献类型：
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作者：
Gebhardt-Henrich SG;Fröhlich EK
大量研究表明，蛋鸡龙骨骨折的发病率很高。在这项纵向研究中，研究人员定期检查80只白蛋鸡和褐蛋鸡的龙骨偏差和骨折情况，同时对产蛋量进行单独监测。大约62%的母鸡在种群减少时出现了龙骨骨折。在铺设率最高的时期，出现了更多的新裂缝。在种群减少时，龙骨骨折的母鸡比龙骨完好的母鸡下第一枚蛋要早。所有双足畸形的鸟类在种群减少时都出现了骨折。大量的研究已经证明了杂交、饲料和住房对龙骨骨折患病率的影响，但行为和生产对个体水平的影响却鲜为人知。在这项纵向研究中，研究人员定期检查80只白蛋鸡和棕色蛋鸡的龙骨偏差和骨折情况，同时使用射频识别（RFID）对蛋鸡的产蛋量进行单独监测，从蛋鸡生产到65周龄时种群减少。这些焦点鸡饲养在8个围栏中，每个围栏共20只鸡。大约62%的母鸡在种群减少时出现了龙骨骨折。新裂缝的发生在时间上与产蛋有关：产蛋率最高的时候出现了更多的新裂缝。在种群减少时，龙骨骨折的母鸡比龙骨完好的母鸡下第一枚蛋要早。然而，蛋的总数与产卵的开始和龙骨骨折无关。所有双足畸形的鸟类在种群减少时都出现了骨折。骨折后10 d的母鸡下蛋时间比骨折前10 d的母鸡下蛋时间更长。总之，铺设率和龙骨骨折之间的关系似乎是可能的。
Numerous studies have documented a high prevalence of keel bone fractures in laying hens. In this longitudinal study, 80 white and brown laying hens were regularly checked for keel bone deviations and fractures while egg production was individually monitored. About 62% of the hens had broken keel bones at depopulation. More new fractures occurred during the time when laying rates were highest. Hens with broken keel bones at depopulation had laid their first egg earlier than hens with intact keel bones. All birds with bumblefoot on both feet had a fracture at depopulation. Numerous studies have demonstrated influences of hybrid, feed, and housing on prevalence of keel bone fractures, but influences of behavior and production on an individual level are less known. In this longitudinal study, 80 white and brown laying hens were regularly checked for keel bone deviations and fractures while egg production was individually monitored using Radio Frequency Identification (RFID) from production until depopulation at 65 weeks of age. These focal birds were kept in eight pens with 20 hens per pen in total. About 62% of the hens had broken keel bones at depopulation. The occurrence of new fractures was temporally linked to egg laying: more new fractures occurred during the time when laying rates were highest. Hens with fractured keel bones at depopulation had laid their first egg earlier than hens with intact keel bones. However, the total number of eggs was neither correlated with the onset of egg laying nor with keel bone fractures. All birds with bumblefoot on both feet had a fracture at depopulation. Hens stayed in the nest for a longer time during egg laying during the ten days after the fracture than during the ten days before the fracture. In conclusion, a relationship between laying rates and keel bone fractures seems likely.