Figure 3.

Interindividual distances for 10 trials in the square arena with two discs with groups of (a) 10 AB zebrafish (N=1 620 450 distances), (b) 10 TL zebrafish (N=1 620 450 distances) in a tank with two discs. N is the number of measurements of distance. Distribution of the interindividual distance shows that groups of TL zebrafish have a stronger cohesion than groups of AB zebrafish. Max. and min. show the maximum or minimum distances found between fish, respectively. A Kolmogorov–Smirnov test shows that the distributions of the interindividual distances of 10 AB and 10 TL are different.