Hajime Kumagai

TL;DR: The results indicated that ODBA is a good proxy for estimating the energy expenditure of grazing farm animals across species and breeds, and the utility and simplicity of the procedure with acceleration loggers could make the accelerometry technique a worthwhile option in field research and commercial farm use.

TL;DR: The results indicated that winery sediment and grape pomace could alter nitrogen metabolism and/or act as new antioxidants for ruminant feeds possessing antioxidant activities.

TL;DR: The results suggest that, in addition to tri-axial acceleration, tri-AXial magnetism is useful for classifying lying, standing, and grazing activities of ruminants and that equalizing the number of data for each behavior is important to correctly assess the predictive accuracy of behavioral classifications, particularly for the behavior with low prevalence.

TL;DR: The results suggested that stable carbon and nitrogen isotope analysis for cattle meat and hair could be used to trace the feeding histories of cattle in Japan, and that hair samples would be used as an alternative to meat.

TL;DR: In this paper, a simplified ration optimization method was applied to a beef cattle fattening system to evaluate the utilization of food by-products under various situations, and the method was extended to reduce feed costs and nitrogen and phosphorus excretions.