• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Livestock Science >Broiler chicken health, welfare and fluctuating asymmetry in organic versus conventional production systems
【24h】

Broiler chicken health, welfare and fluctuating asymmetry in organic versus conventional production systems

机译：有机和传统生产系统中肉鸡的健康，福利和不对称波动

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The aim of this study was to test three predictions: (1) that a combination of animal-based parameters indicates better health and welfare in broilers from organic versus conventional farms, (2) that broilers from organic farms show less fluctuating asymmetry (FA) than broilers from conventional farms, and (3) that, at the level of the individual bird, the relationship between FA and welfare is negative and strongest in conventional broilers. On 140 slaughter-age birds randomly selected from seven organic and seven conventional flocks in Belgium we measured standardised FA and five conventional animal-based welfare indicators (tonic immobility duration, latency-to-lie, and condition of the foot pad, hock, and breast). The caeca from the birds from four organic and four conventional flocks were removed for assessing the presence of two bacterial pathogens (Salmonella and Campylobacter) and the concentration of the health-promoting lactic acid bacteria. Finally, the blood serum concentration of the acute phase protein alpha-1-acid glycoprotein (AGP), a nonspecific indicator of immunological stress, was determined. Salmonella was found in the caeca content of two (2.5%) birds only (both from the same conventional farm), whereas 44 (55.7%) birds were infected with Campylobacter. The prevalence of Campylobacter, the concentration of lactic acid bacteria, the duration of tonic immobility, and the condition of the breast and foot pad did not differ between both production systems. Apart from a higher concentration of AGP, organic birds had better scores for hock condition and a longer latency-to-lie indicating better leg health. In addition, organic birds scored better on the aggregated welfare index (i.e. the average of the five standardised welfare indicators). As both production systems differed in many aspects (e.g. slower-growing genotypes, slaughter age, feed, stocking density, group size) it is impossible to assign differences in welfare/health indicators to a single factor. Whatever the causes may be our findings suggest that, despite the potentially elevated risk of immunological challenge, broiler chicken welfare is generally superior in organic farms as compared with conventional farms in Belgium. Regarding the validity of FA as welfare indicator, the prediction of lower FA in the population with highest aggregated welfare score was confirmed but, at the level of the individual, no associations between FA and the aggregated welfare index were found irrespective of whether data from organic and conventional broilers were analysed separately or combined. (C) 2007 Elsevier B.V. All rights reserved.
机译：这项研究的目的是检验三个预测：（1）基于动物的参数的组合表明有机农场的肉鸡与传统农场的肉鸡具有更好的健康和福利;（2）有机农场的肉鸡的波动性不对称性（FA）降低（3）从个体禽类的角度来看，FA与福利之间的关系在传统肉鸡中是负的，也是最牢固的。我们从比利时的7个有机禽类和7个常规禽类中随机选择了140只屠宰年龄的禽类，我们测量了标准FA和5个基于动物的常规福利指标（紧张不动的持续时间，躺着的时间以及脚垫，飞节和and的状况）。乳房）。从四个有机禽类和四个传统禽类的家禽中取出盲肠，以评估两种细菌病原体（沙门氏菌和弯曲杆菌）的存在以及促进健康的乳酸菌的浓度。最后，确定了急性期蛋白α-1-酸糖蛋白（AGP）（一种免疫应激的非特异性指标）的血清浓度。仅在两只（2.5％）家禽的盲肠中发现了沙门氏菌（均来自同一家常规农场），而弯曲杆菌感染了44只（55.7％）家禽。在这两个生产系统之间，弯曲杆菌的患病率，乳酸菌的浓度，滋补不动的持续时间以及乳房和脚垫的状况没有差异。除了较高的AGP浓度外，有机禽类的飞节状况得分更高，躺下时间更长，表明腿部健康状况更好。此外，有机鸟类在综合福利指数（即五个标准化福利指标的平均值）上得分更高。由于两种生产系统在许多方面都存在差异（例如基因型生长较慢，屠宰年龄，饲料，种群密度，群体规模），因此不可能将福利/健康指标的差异归因于一个因素。无论原因是什么，我们的发现都表明，尽管潜在的免疫挑战风险增加，但有机农场的肉鸡福利通常比比利时的常规农场要高。关于FA作为福利指标的有效性，确认了对总福利得分最高的人群中较低FA的预测，但在个人层面上，无论是否来自自然有机物的数据，都未发现FA与总福利指数之间的关联。和常规肉鸡分别进行分析或组合分析。 （C）2007 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号