Figure 9

Correlation between response strength RS and flipping angle α. The response strengths (RS) of agent bees assessed by movement detection (see inset: md; Figures 7c-e and 8) were normalized to the maximum value in 605 agents and sorted regarding 10 levels between 0.3 to 0.8 of the relative maximal strength (rRS). (a) Gauss distribution of the sorted episodes according to the rRS levels (rN episodes, relative number of episodes; n_episodes = 4672). Three rRS divisions were defined, marked by different shadings of the violet background. (b) Weighted means of flipping angles in a selected group of episodes (black regression line: y = 78.997x+2.601; n_{episodes_sel} = 176; R² = 0.626; P < 0.01, Spearman Rank Correlation test). (c) The probability of inactivity (no or weak abdominal flipping with flipping angles less than 15°as detected by manual inspection) correlated negatively with the rRS (black regression line: y = 0.717x+0.389; n_{episodes_sel} = 176; R² = 0.739; P < 0.001, Spearman Rank Correlation).