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dc.contributor.authorMiwa, Masafumija
dc.contributor.authorOishi, Kazatoja
dc.contributor.authorNakagawa, Yasuhiroja
dc.contributor.authorMaeno, Hiromichija
dc.contributor.authorAnzai, Hirokija
dc.contributor.authorKumagai, Hajimeja
dc.contributor.authorOkano, Kanjija
dc.contributor.authorTobioka, Hisayaja
dc.contributor.authorHirooka, Hiroyukija
dc.contributor.alternative大石, 風人ja
dc.date.accessioned2015-11-13T05:10:28Z-
dc.date.available2015-11-13T05:10:28Z-
dc.date.issued2015-06-01-
dc.identifier.issn1932-6203ja
dc.identifier.urihttp://hdl.handle.net/2433/201555-
dc.description.abstractEstimating the energy expenditure of farm animals at pasture is important for efficient animal management. In recent years, an alternative technique for estimating energy expenditure by measuring body acceleration has been widely performed in wildlife and human studies, but the availability of the technique in farm animals has not yet been examined. In the present study, we tested the potential use of an acceleration index, overall dynamic body acceleration (ODBA), as a new proxy for estimating the energy expenditure of grazing farm animals (cattle, goats and sheep) at pasture with the simultaneous evaluation of a conventional proxy, heart rate. Body accelerations in three axes and heart rate for cows (n = 8, two breeds), goats (n = 6) and sheep (n = 5) were recorded, and the effect of ODBA calculated from the body accelerations on heart rate was analyzed. In addition, the effects of the two other activity indices, the number of steps and vectorial dynamic body acceleration (VeDBA), on heart rate were also investigated. The results of the comparison among three activity indices indicated that ODBA was the best predictor for heart rate. Although the relationship between ODBA and heart rate was different between the groups of species and breeds and between individuals (P<0.01), the difference could be explained by different body weights; a common equation could be established by correcting the body weights (M: kg): heart rate (beats/min) = 147.263∙M-0.141 + 889.640∙M-0.179∙ODBA (g). Combining this equation with the previously reported energy expenditure per heartbeat, we estimated the energy expenditure of the tested animals, and the results indicated that ODBA is a good proxy for estimating the energy expenditure of grazing farm animals across species and breeds. 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.ja
dc.format.mimetypeapplication/pdfja
dc.language.isoengja
dc.publisherPublic Library of Scienceja
dc.rights© 2015 Miwa et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ja
dc.titleApplication of overall dynamic body acceleration as a proxy for estimating the energy expenditure of grazing farm animals: relationship with heart rate.ja
dc.type.niitypeJournal Articleja
dc.identifier.jtitlePLOS ONEja
dc.identifier.volume10ja
dc.identifier.issue6ja
dc.relation.doi10.1371/journal.pone.0128042ja
dc.textversionpublisherja
dc.identifier.artnume0128042ja
dc.identifier.pmid26030931-
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