Table 1. The modulation of shimmering by hovering hornets regarding their distance to the honeybee nest (scenario B).
Categories of distance of the hornets from the nest before shimmering | Number of episodes | Distance of the hornets from the nest before shimmering | Shimmering activity as response to the presence of the hornets | ||
Cdxz | dxz [cm] | n | dxz [cm] | Wpeak | W600 |
1 | 0–18 | 6 | 12.7±1.8 | 12.6±1.3 | 71.1±4.4 |
2 | 18–30 | 19 | 25.9±0.7 | 12.1±2.0 | 67.1±6.9 |
3 | 30–40 | 49 | 35.8±0.4 | 10.0±0.8 | 55.2±2.9 |
4 | 40–60 | 79 | 49.2±0.7 | 8.2±0.5 | 49.4±2.0 |
5 | >60 | 48 | 71.5±1.5 | 6.5±0.5 | 42.4±2.1 |
201 |
Shimmering activities of 201 episodes in terms of Wpeak and W600 in dependence of the pre-wave distances of the hornets from the nest (definitions, see Methods). The hornet data (dxz) were assessed in the interval 400 ms prior to shimmering. Shimmering responses (means±SEM) were categorized by five classes (Cdxz = 1 to 5) of dxz (cf. Fig. 3A).