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A novel accelerometry approach combining information on classified behaviors and quantified physical activity for assessing health status of cattle: a preliminary study
Applied Animal Behaviour Science ( IF 2.3 ) Pub Date : 2021-01-09 , DOI: 10.1016/j.applanim.2021.105220
Shogo Uenishi , Kazato Oishi , Tomoki Kojima , Kaho Kitajima , Yudai Yasunaka , Koki Sakai , Yuta Sonoda , Hajime Kumagai , Hiroyuki Hirooka

Evaluation of animal behavior provides information on health and well-being in animals. In this preliminary study, we investigated the effectiveness of an accelerometry approach to evaluate changes in health status of cattle by combining physical activity quantified by dynamic body acceleration (DBA) and qualitative behavioral classification data. Although feeding low vitamin A (VA) diets to fattening cattle is a popular technique to enhance marbling of beef in Japan, the effects of VA restriction on behavior of fattening cattle have been unclear. Therefore, the effect of VA restriction on behavioral change in feedlot steers was assessed by the approach as an example of evaluation of the change in health status. Ten Japanese Black fattening steers were divided into VA restricted (RES) and supplemented (SUP) groups (five in each group). The RES steers were fed lower VA diets than SUP from 11 to 20 months of age. The measurements of blood VA concentrations, accelerations and classified behaviors of the steers were conducted at 18 and 24 months of age. An accelerometer was fitted dorsally to each steer and three axial accelerations were measured at 10 Hz. The raw acceleration data was processed to calculate vectorial DBA (VeDBA) per second. Behavior of the steers was recorded for 8.5 h on one day and visually classified per second as lying, standing, walking or feeding. As the results, the blood VA concentration at 18 months of age was lower in RES than SUP (P < 0.05) (53.2 and 95.6 IU/dL, respectively) but the concentration was similar between the groups at 24 months of age. All VA concentrations were over the recommended minimum value and none of the steers showed clinical manifestations of VA deficiency, indicating that VA restriction was controlled as expected. The durations of classified behaviors and the overall mean VeDBA were similar between the groups. However, the VeDBA for walking was higher in RES than SUP at both ages (P < 0.05). The results suggested that animals under VA restriction might slightly alter their gait as a stress response at 18 months of age and a residual of this might be detected even after the increase of blood VA concentration at 24 months of age; small changes in behavior that could not be detectable by visual classification were quantified via accelerometry. In the future, a combination of automatic behavioral classification and quantified physical activity such as DBA will be useful for feedback on animal health and well-being.



中文翻译:

一种新颖的加速度计方法,结合分类行为信息和量化体力活动来评估牛的健康状况:初步研究

对动物行为的评估提供了有关动物健康和福祉的信息。在这项初步研究中,我们调查了通过结合通过动态身体加速度(DBA)量化的身体活动和定性行为分类数据来评估牛健康状况变化的加速度计方法的有效性。尽管在日本给肥牛饲喂低维生素A(VA)饮食是增强牛肉大理石花纹的一种流行技术,但尚不清楚VA限制肥牛行为的影响。因此,通过该方法评估了VA限制对育肥场公牛行为改变的影响,作为评估健康状况变化的一个例子。将十只日本黑增肥ste牛皮分为VA限制(RES)组和补充(SUP)组(每组五只)。从11到20个月大时,RES牛的VA饮食比SUP低。在18和24个月大时对牛的血液VA浓度,加速度和分类行为进行了测量。每个转向都背面安装了一个加速度计,并在10 Hz下测量了三个轴向加速度。处理原始加速度数据以计算每秒的矢量DBA(VeDBA)。在一天中记录了8.5小时的ers牛行为,并在视觉上每秒分为躺卧,站立,行走或进食。结果,RES中18个月龄时的血液VA浓度低于SUP(P <0.05)(分别为53.2和95.6 IU / dL),但24个月龄组之间的浓度相似。所有VA浓度均超过建议的最小值,且所有ers牛均未显示VA缺乏的临床表现,表明VA限制已达到预期。两组之间的分类行为持续时间和总体平均VeDBA相似。然而,在两个年龄段,行走的VeDBA的RES均高于SUP(P <0.05)。结果表明,受VA限制的动物在18个月大时可能会因压力反应而略微改变步态,即使在24个月大时血液VA浓度增加后也可能发现残留。通过加速度计可以量化无法通过视觉分类检测到的微小行为变化。在将来,

更新日期:2021-01-18
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