Navigating the iceberg: reducing the number of parameters within the Welfare Quality® assessment protocol for dairy cows
Navigating the iceberg: reducing the number of parameters within the Welfare Quality® assessment protocol for dairy cows
复制标题
DOI：
10.1017/s1751731114002018
复制
发表时间：
2014-12-01
期刊：
影响因子：
3.6
通讯作者：
Main, D. C. J.
中科院分区：
文献类型：
--
作者：
Heath, C. A. E.;Browne, W. J.;Main, D. C. J.
福利质量议定书提供了一个多层面的福利评估，这是漫长的，因此在实用性方面有限。本研究的目的是调查潜在的“冰山指标”，它可以可靠地预测整体分类作为一种手段，减少评估的时间长度，从而增加福利质量（R）协议作为一个多维度的福利评估的可行性。在英格兰和威尔士的92个奶牛场进行了全面的福利质量（R）评估。这些农场都被归类为可接受或增强。使用交叉验证的逻辑回归模型比较模型对农场总体分类的拟合。研究发现，“没有长期口渴”本身就能正确地将农场分类为88%。更一般地说，模型中包含更多指标与总体分类的更高预测能力无关。因此，在理论上，长期口渴的情况下，可以被认为是一个冰山指标的福利质量（R）协议，并可以减少农场评估的时间长度为15分钟。以前的工作表明，福利质量（R）协议内的参数是重要的，相关的福利评估。然而，有人认为，公布的聚合系统的可信度受到损害的发现，一个资源措施（缺乏长期口渴）是一个主要的驱动程序的整体分类。因此，它建议，突出的情况下，长期口渴在这一作用可能会更好地理解为一个意想不到的后果公布的措施汇总系统，而不是反映一个现实的冰山指标。
The Welfare Quality(R) protocols provide a multidimensional assessment of welfare, which is lengthy, and hence limited in terms of practicality. The aim of this study was to investigate potential 'iceberg indicators' which could reliably predict the overall classification as a means of reducing the length of time for an assessment and so increase the feasibility of the Welfare Quality(R) protocol as a multidimensional assessment of welfare. Full Welfare Quality(R) assessments were carried out on 92 dairy farms in England and Wales. The farms were all classified as Acceptable or Enhanced. Logistic regression models with cross validation were used to compare model fit for the overall classification on farms. 'Absence of prolonged thirst', on its own, was found to correctly classify farms 88% of the time. More generally, the inclusion of more measures in the models was not associated with greater predictive ability for the overall classification. Absence of prolonged thirst could thus, in theory, be considered to be an iceberg indicator for the Welfare Quality(R) protocol, and could reduce the length of time for a farm assessment to 15 min. Previous work has shown that the parameters within the Welfare Quality(R) protocol are important and relevant for welfare assessment. However, it is argued that the credibility of the published aggregation system is compromised by the finding that one resource measure (Absence of prolonged thirst) is a major driver for the overall classification. It is therefore suggested that the prominence of Absence of prolonged thirst in this role may be better understood as an unintended consequence of the published measure aggregation system rather than as reflecting a realistic iceberg indicator.