Triaxial accelerometers for recording grazing and ruminating time in dairy cows: An alternative to visual observations

被引：31

作者：

Rayas-Amor, Adolfo A. ^{[1
]}

Morales-Almaraz, Ernesto ^{[2
]}

Licona-Velazquez, Gustavo ^{[2
]}

Vieyra-Alberto, Rodolfo ^{[3
]}

Garcia-Martinez, Anastacio ^{[4
]}

Martinez-Garcia, Carlos G. ^{[4
,5
]}

Cruz-Monterrosa, Rosy G. ^{[1
]}

Miranda-de la Lama, Genaro C. ^{[1
]}

机构：

[1] Metropolitan Autonomous Univ, Dept Agrifood Sci, UAM Lerma, Lerma De Villada, State Mexico, Mexico

[2] Autonomous Univ State Mexico, Fac Vet Med, El Cerrillo Campus, Toluca, Estado De Mexic, Mexico

[3] Colegio Super Agr Estado Guerrero, CEP CSAEGRO, Ctr Estudios Profes, Cocula, Guerrero, Mexico

[4] Autonomous Univ State Mexico, Ctr Univ Temascaltepec, El Cerrillo Campus, Toluca, Estado De Mexic, Mexico

[5] Autonomous Univ State Mexico, Inst Agr & Rural Sci ICAR, El Cerrillo Campus, Toluca, Estado De Mexic, Mexico

来源：

JOURNAL OF VETERINARY BEHAVIOR-CLINICAL APPLICATIONS AND RESEARCH | 2017年 / 20卷

关键词：

validation; triaxial accelerometer; HOBO Pendant G; grazing; ruminating; dairy cows; TECHNICAL-NOTE EVALUATION; BEHAVIOR; CLASSIFICATION; PASTURE; COLLARS; SYSTEM;

D O I：

10.1016/j.jveb.2017.04.003

中图分类号：

B84 [心理学]; C [社会科学总论]; Q98 [人类学];

学科分类号：

03 ; 0303 ; 030303 ; 04 ; 0402 ;

摘要：

The 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/s(2)) 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 (degrees Y-axis) was used to determine grazing position (readings >0 degrees and <61 degrees) and ruminating (readings >0 degrees and <25.8 degrees). 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 R-2 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. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：102 / 108

页数：7

共 31 条

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