000150451 001__ 150451
000150451 005__ 20250203191514.0
000150451 0247_ $$2doi$$a10.1016/j.jveb.2017.04.003
000150451 0248_ $$2sideral$$a134022
000150451 037__ $$aART-2017-134022
000150451 041__ $$aeng
000150451 100__ $$aRayas-Amor, Adolfo A.
000150451 245__ $$aTriaxial accelerometers for recording grazing and ruminating time in dairy cows: an alternative to visual observations
000150451 260__ $$c2017
000150451 5060_ $$aAccess copy available to the general public$$fUnrestricted
000150451 5203_ $$aThe aim of this study was to validate the recordings of a commercial triaxial accelerometer (HOBO Pendant G data loggers) with respect to visual observations of grazing and ruminating time of dairy cows. Seven lactating Holstein cows with a mean body weight of 602 ± 45 kg were used for the study. Grazing and ruminating times were recorded using HOBO loggers (31.5 hours of total observations for grazing and ruminating) that were attached to the lateral-medial side of the jaw using a strap attached to the head of each cow in a position such that the X-axis was parallel to the ground, the Y-axis was perpendicular to the ground pointing upward, and the Z-axis was parallel to the ground pointing away from the sagittal plane; these relative positions were defined when the cow was in a natural head-up position. Median acceleration (m/s2) readings in the X-axis >0.175 and <0.95 indicated grazing activity, whereas readings in the Z-axis >−0.275 and <0.0875 indicated ruminating activity. The degree of vertical tilt (° Y-axis) was used to determine grazing position (readings >0° and <61°) and ruminating (readings >0° and <25.8°). Results showed a significant (P < 0.001) relationship of estimated grazing time against visual observations when acceleration (X-axis) was used only; nonetheless acceleration (Z-axis) was not significant (P > 0.05) for estimating ruminating time. When acceleration and tilt were used for estimating grazing (X- and Y-axis) and ruminating (Z- and Y-axis) time, the slope in both showed a significant (P ≤ 0.001) relationship. The prediction R2 in both activities indicated that acceleration (X- and Z-axis) and tilt (Y-axis) of HOBO loggers explained 0.961 and 0.945 of the variance in visual observations per cow/day. Therefore, the validation of the HOBO loggers was successful on a per cow/day and per day basis.
000150451 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000150451 590__ $$a1.554$$b2017
000150451 591__ $$aVETERINARY SCIENCES$$b35 / 139 = 0.252$$c2017$$dQ2$$eT1
000150451 591__ $$aBEHAVIORAL SCIENCES$$b45 / 51 = 0.882$$c2017$$dQ4$$eT3
000150451 592__ $$a0.782$$b2017
000150451 593__ $$aVeterinary (miscellaneous)$$c2017$$dQ1
000150451 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/submittedVersion
000150451 700__ $$aMorales-Almaráz, Ernesto
000150451 700__ $$aLicona-Velázquez, Gustavo
000150451 700__ $$aVieyra-Alberto, Rodolfo
000150451 700__ $$aGarcía-Martínez, Anastacio
000150451 700__ $$aMartínez-García, Carlos G.
000150451 700__ $$aCruz-Monterrosa, Rosy G.
000150451 700__ $$0(orcid)0000-0002-6848-1010$$aMiranda-de la Lama, Genaro C.
000150451 773__ $$g20 (2017), 102-108$$pJournal of Veterinary Behavior-Clinical Applications and Research$$tJournal of Veterinary Behavior$$x1558-7878
000150451 8564_ $$s1392450$$uhttps://zaguan.unizar.es/record/150451/files/texto_completo.pdf$$yPreprint
000150451 8564_ $$s2327857$$uhttps://zaguan.unizar.es/record/150451/files/texto_completo.jpg?subformat=icon$$xicon$$yPreprint
000150451 909CO $$ooai:zaguan.unizar.es:150451$$particulos$$pdriver
000150451 951__ $$a2025-02-03-17:41:54
000150451 980__ $$aARTICLE