COMPARISON OF BONE VOLUME AND STRENGTH AS MEASURES OF SKELETAL INTEGRITY IN CAGED LAYING HENS WITH ACCESS TO PERCHES
COMPARISON OF BONE VOLUME AND STRENGTH AS MEASURES OF SKELETAL INTEGRITY IN CAGED LAYING HENS WITH ACCESS TO PERCHES
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DOI：
10.1016/0034-5288(93)90057-m
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发表时间：
1993-03-01
影响因子：
2.4
通讯作者：
SMITH, SF
中科院分区：
文献类型：
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作者：
HUGHES, BO;WILSON, S;SMITH, SF
废蛋鸡骨折现在被认为是一个主要的福利问题；这项工作的目的是确定为笼养蛋鸡提供栖息处是否会增加骨强度、骨体积或两者兼而有之。 16 只 18 至 72 周龄的 ISA Brown 母鸡被饲养在有栖息处的笼子里，16 只被饲养在没有栖息处的类似笼子里。产蛋结束时，通过三点负载测试检查鸡的胫跗骨的强度，并通过组织形态测量法检查跗跖骨的骨体积。栖息处对胫跗骨断裂强度没有显着影响。两组母鸡均表现出骨质疏松症的迹象，但传统笼养的母鸡骨质疏松症更为严重：能够接近栖息处的母鸡跗跖骨小梁骨体积更大。研究发现，母鸡的骨小梁体积与白天使用鲈鱼的程度呈正相关。提供栖息处可以对增加笼养蛋鸡的骨量产生轻微但显着的有益作用，至少对于腿骨而言。
Fractures in spent laying hens are now recognised as a major welfare problem; the objective of this work was to determine whether provision of perches for caged layers would increase bone strength, bone volume or both. Sixteen ISA Brown hens were housed from 18 to 72 weeks old in cages with perches and 16 in similar cages without perches. At the end of lay the birds' tibiotarsi were examined for strength by a three-point loading test and their tarsometatarsi for bone volume by histomorphometry. There was no significant effect of perches on tibiotarsal breaking strength. Hens from both groups showed evidence of osteoporosis, but it was more severe in the birds from conventional cages: tarsometatarsal trabecular bone volume was greater in the hens which had access to perches. A positive correlation was found between trabecular bone volume and the degree of day-time perch usage by individual hens. Provision of perches can have a slight but significant beneficial effect, at least for the leg bones, in increasing the bone volume of caged laying hens.