Table 1. Description of features used in our multi-model inference approach for predicting which individuals were targeted and survived attacks.
For a visualisation of the features, see Figure 3.
| Feature | Acronym | Description |
|---|---|---|
| Body length | BL | Shiner’s body length (cm) |
| Centre distance | CD | Shiner’s distance from the group centroid (cm) |
| Centre-edge position | CDrank | Shiner’s CD ranked and scaled from 0 (most central) to 1 (least central) |
| Convex hull position | Hpos | Whether a shiner was part of the group hull or not |
| Inter-individual distance | IID | Shiner’s median distance to all of its group mates |
| Local misalignment | LMis | Difference in orientation angle (in degrees) between the shiner and its group mates within 10 cm |
| Voronoi area | VA | Area (cm2) around a shiner closest to that individual and not another individual, limited to the boundaries of the testing arena (log-transformed) |
| Limited domain of danger | LDOD | VA limited to a max radius of 10 cm from the shiner (log-transformed) |
| Front-back centre distance | FBCD | Shiners’ distance from the group centroid in the plane of the group average orientation (positive values indicate in front of the centroid) |
| Front-back position | FBrank | Shiners’ FBCD ranked and scaled from 1 (front) to 0 (back) |
| Visual weighted degree | WDeg | The proportion of each shiner’s vision occupied by conspecifics |
| Distance to the pike | PD | Shiner’s distance to the head centroid of the pike (cm) |
| Angle to the pike | PA | Shiner’s position relative to the pike facing north (degrees), 0° being straight in front and 180° directly behind |
| Orientation to the pike | PO | The relative orientation (head to tail angle) of the shiner to that of the pike |
| Pike vision of shiner | PVS | Pike’s field of view occupied by the individual shiner (deg) |
| Target max speed | TMS | Targeted shiner’s maximum speed (cm/s) (smoothed data) |
| Target max acceleration | TMA | Targeted shiner’s maximum acceleration (m/s2) (smoothed data) |
| Target max turn | TMT | Targeted shiner’s maximum orientation change (deg) in the 0.5 s until the time of attack |
| Pike max acceleration | PMA | Pike’s maximum acceleration (m/s2) (smoothed data) |