Table 2. Descriptive statistics of the different trajectory types.

	Upstream stay	Downstream stay	Straight up	Straight down	Milling and up	Milling and down	Unidentified	All
Mean±SE	4.45±1.09	19.85±5.69	13.54±2.13	11.17±2.83	32.55±4.45	15.14±4.89	0.96±0.25	10.49±1.20
Min−Max	0.50–9.83	0.64–74.01	1.37–49.67	0.94–95.80	4.22–61.23	10.25–20.03	0.0001–8.68	0.0001–95.80
N	9	14	30	35	19	2	65	174

The duration of each type of trajectory (in min) is given as the mean ± standard error (SE) with minimum (Min) and maximum (Max) values.