Table 1 List of grazing personality behaviours with abbreviations, units, data transformations and description of calculations
Abbreviation | Units | Transformation | Description | |
|---|---|---|---|---|
Daily horizontal distance travelled | ho_dist | m/d | Log transformed | Distance calculated as the sum of distances between consecutive GPSa data points per d using two dimensions (i.e. Easting and Northing) of the UTMb projection |
Daily vertical distance travelled | ve_dist | m/d | Log transformed | Distance calculated as the sum of the absolute difference in elevation between consecutive GPS data points per d using a DEMc |
Daily three-dimensional distance travelled | 3D_dist | m/d | Log transformed | Distance calculated as the sum of distances between GPS data points per d using three dimensions (i.e. Eastern and Northing of UTM and elevation difference from DEM) |
Daily elevation range | ele_range | m | Log transformed | Range of elevation computed as calculated as the difference between the daily maximum and minimum elevation |
Daily elevation gain | ele_gain | m/d | Log transformed | Sum of positive changes of elevation between consecutive GPS data points as depicted from a DEM |
Relative elevation mean | rel_ele | 0–1 scale | In any given day, ratio between the cows’ mean elevation minus the minimum elevation of the herd and the elevation range of the herd | |
Relative elevation 85th quantile | rel_ele85 | 0–1 scale | In any given day, ratio between the cows’ 85th quantile of the elevation minus the minimum elevation of the herd and the elevation range of the herd | |
Relative elevation range | rel_ele_range | 0–1 scale | In any given day, ratio between the cows’ elevation range and the elevation range of the herd | |
Daily slope 85th quantile | slope85 | Percentage | 85th quantile of the slope across GPS data points per day as depicted from a DEM | |
Daily home range | hr_mcp | ha/d | Log transformed | Explored area estimated by calculating the minimum convex polygon depicted from all GPS data points per day using the R package ‘adehabitatHR’ |
Daily searching pattern tortuosity | sp_tortuosity | m/ha | Log transformed | Movement tortuosity estimated as the ratio between daily horizontal distance and daily home range |