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Predicting Cattle Grazing Behavior on Rangeland using Accelerometers

Authors :
Sprinkle, James E.
Sagers, Joseph K.
Hall, John B.
Ellison, Melinda J.
Yelich, Joel V.
Brennan, Jameson R.
Taylor, J. Bret
Lamb, James B.
Source :
Rangeland Ecology and Management; May 2021, Vol. 76 Issue: 1 p157-170, 14p
Publication Year :
2021

Abstract

The objective was to determine if 3-axis accelerometers could be used to predict daily activity for cattle grazing rangeland. There were 48 Hereford × Angus 2-yr-old low- or high-residual feed intake (LRFI or HRFI) cows used in this 2-yr trial. Cattle grazed in 4 pasture treatments consisting of continuously grazed, control (CCON); continuously grazed, supplemented (CTRT); rotationally grazed, control (RCON); and rotationally grazed, supplemented pastures (RTRT). Three LRFI- and 3 HRFI-collared cows in each treatment had accelerometers mounted for 29 d in 2016 and 45 d in 2017, beginning mid-October. Grazing time (GT), resting time (RT), and walking time (WLK) were obtained for each cow by direct observation over 3 d each year and compared with accelerometer predicted behavior. In 2016, 1.6% of the days were rejected for halter-mounted accelerometers and 3.6% were rejected in 2017 for collar-mounted accelerometers. The GT and RT were more accurately predicted than was WLK with the percentage error of predicted against observed data being 11.94% for RT, 13.51% for GT, and 30.13% for WLK in 2017. Less observation data were available in 2016, but when considering other sampling periods for the same cows and halters, the error rate was 15.1% for RT, 19.3% for GT, and 52.6% for WLK. The accelerometers successfully identified patterns of grazing behavior and differentiated among climatic, grazing system, supplementation status, and residual feed intake classification influences on GT, RT, and WLK. In a more moderate climate year, HRFI cattle appeared to rest less (P< 0.08) and walk more (P< 0.07) than LRFI cattle. Similar patterns were observed for cattle in the CCON versus CTRT treatments, with supplemented cattle resting more (P< 0.05) and walking less (P< 0.05). Accelerometers appear to be effective in determining mechanistic adaptations in grazing behavior by beef cattle on range.

Details

Language :
English
ISSN :
15507424 and 15515028
Volume :
76
Issue :
1
Database :
Supplemental Index
Journal :
Rangeland Ecology and Management
Publication Type :
Periodical
Accession number :
ejs54478865
Full Text :
https://doi.org/10.1016/j.rama.2020.10.001