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在澳大利亚的三家商业自由放牧层家禽场中,窒息的危险因素2019-2022澳大利亚2019-2022年

P Chowdhury¹, P H Hemsworth², A D Fisher²

¹Asia Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Science, The University of Melbourne, Parkville, Victoria 3010, Australia; Animal Welfare Science Centre, Melbourne Veterinary School, Faculty of Science, The University of Melbourne, Parkville, Victoria 3010, Australia.

Preventive veterinary medicine

|May 18, 2025

概括

自由放养的的窒息死亡与鸟住房和恶劣的天气条件 (如雨和高湿度) 有关. 了解这些风险因素可以改善家禽福利,减少经济损失.

科学领域:

禽畜科学禽畜科学禽畜科学
动物福利动物福利
农业管理农业管理

背景情况:

窒息,或窒息由于堆积行为,导致大量的死亡率和经济损失在自由范围的.
确定特定的风险因素对于减轻密集家禽生产中这些不可忽视的损失至关重要.

研究的目的:

识别和量化与澳大利亚商业自由放养养殖场窒息死亡相关的风险因素.
为适应群体管理策略提供见解,以减少窒息事件的发生.

主要方法:

一项前性队列研究,涉及澳大利亚东部的三家商业自由放牧层农场.
数据收集包括2019年1月至2022年3月的日常生产,天气,群体管理和窒息事件细节.
时间到事件的生存分析,包括分层的Cox比例危险模型,用于评估风险因素.

主要成果:

在生产期间,每100只鸟类中约有12例死亡中有2例死于窒息.
与平板甲板棚的鸟类相比,鸟中的鸟类每日窒息的风险明显更高 (HR 4.0).
在温暖,潮湿,雨天观察到窒息的风险增加,在对人类的恐惧较低,对新奇物体的恐惧较高的鸟类中观察到. 雨天,湿度≥70%,室内窒息风险增加了3.7倍.

结论:

棚屋类型 (鸟与平板甲板) 和日常天气条件 (温度,湿度,雨水) 是窒息死亡率的重要决定因素.
鸟类的行为,特别是恐惧反应,也在窒息的风险中起作用.
这项研究为积极管理提供了可操作的见解,以提高家禽福利和经济成果.

关键词:

动物福利动物福利原因导致原因造成的原因.流行病学流行病学在自由放牧的肉.风险因素风险因素消火消火是一种消火.

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