Figure 4
From: The interplay of group size and flow velocity modulates fish exploratory behaviour

Vertical probability density (\({\text{P}}_{\text{V}}\)) for different group sizes and velocities (bottom of the flume: \(\text{z}\)=0; free water surface: z = 15 cm). Each PV is retrieved with Kernel density estimation of all vertical fish positions detected at the respective flow velocity and group size.