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Radiated temperature from thermal imaging is related to feed consumption, growth rate and feed efficiency in grower pigs
Journal of Thermal Biology ( IF 2.7 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jtherbio.2020.102747
Nigel Cook 1 , Brady Chabot 2 , Tong Liu 2 , Denise Froehlich 1 , John Basarab 1 , Manuel Juarez 2
Affiliation  

Individual feed consumption and animal weight were continuously recorded in grower pigs using an automated feeding system. Infrared images were recorded each time a pig entered the feeding system and infrared thermography provided radiated thermal measurements of the dorsal surface of each animal. Feed was withdrawn and the animals fasted for a period of 24 h three times during the growth of the animals at body weights of approximately 35, 65 and 105 kg. There was a significant reduction of 0.28 °C in the maximum surface temperature (Tmax), and 0.48 °C in the average surface temperature (Tmean) during the periods of fasting. Maximum and average pig temperatures exhibited negative correlations to feed consumption and growth variables. There were negative correlations of residual feed intake (RFI) to Tmax and Tmean radiated temperatures. There were positive correlations of residual gain (RG) and residual intake and gain (RIG) with Tmax and Tmean. The Tmax and Tmean temperature responses to fasting were negatively associated with feed consumption and growth variables. Absolute temperature and temperature response variables were positively associated with RFI and negatively associated with residual intake and gain (RIG). These findings provide support for the concept of radiated heat losses as a measure of metabolic activity and a predictor of growth performance.

中文翻译:

热成像辐射温度与生长猪的饲料消耗、生长速度和饲料效率有关

使用自动饲喂系统连续记录生长猪的个体饲料消耗和动物体重。每次猪进入饲养系统时都会记录红外图像,红外热成像提供每只动物背表面的辐射热测量值。在动物生长期间,以大约 35、65 和 105 kg 的体重停止喂食,动物禁食 3 次,每次 24 小时。在禁食期间,最高表面温度 (Tmax) 显着降低 0.28 °C,平均表面温度 (Tmean) 显着降低 0.48 °C。猪的最高和平均温度与饲料消耗和生长变量呈负相关。剩余饲料摄入量 (RFI) 与 Tmax 和 Tmean 辐射温度呈负相关。残余增重(RG)和残余摄入和增重(RIG)与 Tmax 和 Tmean 呈正相关。对禁食的 Tmax 和 Tmean 温度响应与饲料消耗和生长变量呈负相关。绝对温度和温度响应变量与 RFI 呈正相关,与残留摄入量和增益 (RIG) 呈负相关。这些发现支持将辐射热损失作为代谢活动量度和生长性能预测指标的概念。绝对温度和温度响应变量与 RFI 呈正相关,与残留摄入量和增益 (RIG) 呈负相关。这些发现支持将辐射热损失作为代谢活动量度和生长性能预测指标的概念。绝对温度和温度响应变量与 RFI 呈正相关,与残留摄入量和增益 (RIG) 呈负相关。这些发现支持将辐射热损失作为代谢活动量度和生长性能预测指标的概念。
更新日期:2020-12-01
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