Context Lamb producers are currently limited in their ability to make informed on-farm management changes with respect to disease and defects identified at processing. This is due to the limited accuracy and detail of information included in disease and defect feedback supplied by processors. Increasing transparency of the feedback can allow producers to make more informed on-farm decisions, and, subsequently, improve productivity and animal welfare. Aims Using arthritis as a case study, the aim was to develop a scoring system that estimates hot standard carcass weight (HSCW) losses due to trimming at processing, so as to improve feedback to lamb producers. Methods An observational cross-sectional study was conducted at a southern New South Wales commercial processing facility, over 6 months and in five week-long blocks, from 21 February 2019 to 5 July 2019. Carcass trim components removed due to the presence of arthritis (shank or leg) were recorded for 217 of the 42 164 lamb carcasses processed. Utilising average lot HSCWs, the total proportion of HSCW lost due to arthritis trimming (TPL) was calculated for each arthritic carcass. Linear regression analysis, with a logit-transform of TPL, was fitted to the data. Key results Processing lot and trim-component category were found to be significant (P 0.05) different were combined, with final categories being assigned arthritis trim scores as follows: 1, any forequarter shank; 2, any hindquarter shank; 3, any forequarter leg; and 4, any hindquarter leg. At an over-the-hooks carcass price of AU$7.83/kg and an average HSCW of 23.13 kg, these scores were used to estimate producer revenue losses per carcass (range AU$2.95–AU$18.08). Conclusions The accuracy and detail of information provided as feedback to lamb producers can be improved. For arthritis, this can be achieved using a trim-scoring system. Implications Altering feedback to include HSCW losses for processed lots in both kilograms and dollars against the associated disease or defect will better equip producers to make cost-effective on-farm management changes and reduce the impact on the lamb supply chain.

中文翻译：

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量化加工过程中的疾病和缺陷胴体损失以改善羊肉供应链中的反馈：关节炎案例研究

背景 羊肉生产者目前在对加工过程中发现的疾病和缺陷做出知情的农场管理变更方面的能力有限。这是由于处理器提供的疾病和缺陷反馈中包含的信息的准确性和细节有限。提高反馈的透明度可以让生产者做出更明智的农场决策，从而提高生产力和动物福利。目的 使用关节炎作为案例研究，目的是开发一个评分系统，用于估计由于加工过程中修剪导致的热标准胴体重量 (HSCW) 损失，从而改善对羊肉生产者的反馈。方法 在新南威尔士州南部的商业加工设施中进行了一项观察性横断面研究，为期 6 个月，为期五个星期，从 2019 年 2 月 21 日到 2019 年 7 月 5 日。在处理的 42 164 只羔羊尸体中，有 217 只因关节炎（小腿或腿）的存在而被移除。利用平均批次 HSCW，计算每个关节炎胴体因关节炎修剪 (TPL) 而损失的 HSCW 总比例。使用 TPL 的 logit 变换的线性回归分析适合数据。主要结果处理批次和修剪组件类别被发现是显着的 (P 0.05) 不同的组合，最终类别分配的关节炎修剪分数如下：1，任何前躯小腿；2、任何后躯小腿；3、任何前躯腿；和 4，任何后躯腿。以 7.83 澳元/公斤的超钩胴体价格和 23.13 公斤的平均 HSCW 计算，这些分数用于估计每头胴体的生产者收入损失（范围为 2.5 澳元）。95–18.08 澳元）。结论 作为反馈给羔羊生产者的信息的准确性和细节可以提高。对于关节炎，这可以使用修剪评分系统来实现。影响 改变反馈以将加工批次的 HSCW 损失（以公斤和美元计）与相关疾病或缺陷包括在内，将更好地使生产者能够进行具有成本效益的农场管理变革，并减少对羊肉供应链的影响。