Table 2.

Traits of the movement behavior of fish species during the shoal size discrimination task (mean ± S.E.)

Species	N	Body mass (g)	Body length (cm)	Shuttering frequency (min−1)	Time in neutral area (%)	Time spent moving (%)	Median speed (BLs−1)
Cichlid	64	1.66 ± 0.04	4.21 ± 0.03	1.55 ± 0.06a	14.90 ± 0.71a	77.71 ± 0.604a	1.35 ± 0.02b
Zebrafish	70	0.76 ± 0.02	3.33 ± 0.02	1.35 ± 0.11a	13.23 ± 1.00ab	80.78 ± 2.38a	1.78 ± 0.06a
Mountain carp	69	1.33 ± 0.03	4.56 ± 0.04	1.62 ± 0.14a	14.23 ± 0.80a	73.68 ± 2.12ab	0.93 ± 0.03c
Pale chub	72	1.17 ± 0.04	4.42 ± 0.05	0.87 ± 0.13b	11.50 ± 0.78bc	44.85 ± 3.08d	0.79 ± 0.06d
Tench	70	1.84 ± 0.04	4.65 ± 0.04	0.61 ± 0.07bc	11.43 ± 0.97bc	54.42 ± 2.35c	0.77 ± 0.02de
Bitterling	68	2.63 ± 0.05	4.86 ± 0.03	0.16 ± 0.06e	4.20 ± 0.70e	75.20 ± 2.71a	1.25 ± 0.05b
Qingbo	72	2.00 ± 0.06	4.88 ± 0.04	0.82 ± 0.07b	10.30 ± 0.76 cd	40.40 ± 2.51de	0.49 ± 0.02f
Stream grouper	34	1.05 ± 0.03	3.91 ± 0.04	0.24 ± 0.05de	3.89 ± 0.84e	67.52 ± 5.36b	0.96 ± 0.03c
Crucian carp	71	2.12 ± 0.04	4.63 ± 0.03	0.45 ± 0.04 cd	8.19 ± 0.60d	80.77 ± 1.43a	1.35 ± 0.04b
Bighead carp	70	1.06 ± 0.03	4.07 ± 0.04	0.25 ± 0.05de	9.35 ± 0.80 cd	36.03 ± 1.97e	0.66 ± 0.01e

a, b, c, d, e, f, superscript without a common letter are significantly different (P < 0.05)