Tomoki Kojima's research while affiliated with Fukuoka Agricultural Research Centre and other places

Publications (7)

Article
Heart rate variability (HRV), heart beat-to-beat variations, is a measure of cardiac autonomic functions, and HRV monitoring using sensor technology can be a non-invasive way to assess stress of animals. The objective of this study was to investigate the effect of dietary vitamin A (VA) restriction to enhance beef quality on the physiological statu...
Article
Body condition score (BCS) is a proxy for evaluating body fat reserves. However, monitoring BCS is a time-consuming and subjective task. Thus, we aimed to develop a method for estimating the BCS of beef cows using three-dimensional (3D) body features of cows’ rump area derived from 3D camera data. Three-dimensional surface data of the rump area fro...
Article
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....
Article
Full-text available
Experimental and comparative studies suggest that the striped coats of zebras can prevent biting fly attacks. Biting flies are serious pests of livestock that cause economic losses in animal production. We hypothesized that cows painted with black and white stripes on their body could avoid biting fly attacks and show fewer fly-repelling behaviors....
Article
Cattle grazing in abandoned fields has recently been of great importance in promoting effective utilization of local resources in Japan. The objectives of this study were to investigate spatial distributions of grazing cattle in abandoned fields and to analyze relationships between the patterns of spatial distribution and energy expenditure (EE) of...

Citations

... In previous studies, the acceleration amplitude of the classification behavior fixed on the neck was usually set to ±2 g [32,33]. This amplitude is sufficient for unitary behaviors (feeding, ruminating, resting, etc.). ...
... The latter may be due to breed and coat color serving as confounding variables. Most recently, black cattle painted with black and white stripes attracted fewer biting flies than their counterparts painted only with black stripes or with no paint at all, implying that color or patterning may affect biting fly attractiveness (Kojima et al., 2019). ...