Table 2.

Variation of total length, weight and meristic parameters for the three Butis species (TL: total length (cm), W: weight (g); HL: head length (cm); BD: body depth (cm); ED: eye diameter (cm); DE: distance between eyes (cm); SE: Standard error).

Species (number of fishes)		W±SE	TL±SE	ED±SE	DE±SE	BD±SE	HL±SE	HL/TL±SE	BD/TL±SE	ED/HL±SE	DE/HL±SE
B. butis (715)		11.35 ± 0.31	9.97 ± 0.07	0.43 ± 0.003	0.65 ± 0.007	1.47 ± 0.02	2.75 ± 0.02	0.15 ± 0.001a	0.28 ± 0.001b	0.16 ± 0.001b	0.24 ± 0.002b
Shapiro-Wilk test	W	0.72	0.95	0.91	0.93	0.94	0.95	0.92	0.86	0.69	0.53
	p	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
B. humeralis (871)		14.66 ± 0.35	10.48 ± 0.07	0.44 ± 0.003	0.70 ± 0.006	1.61 ± 0.01	2.91 ± 0.02	0.15 ± 0.001b	0.28 ± 0.001b	0.15 ± 0.001a	0.24 ± 0.001b
Shapiro-Wilk test	W	0.81	0.98	0.16	0.97	0.95	0.96	0.95	0.87	0.97	0.80
	p	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
B. koilomatodon (876)		5.46 ± 0.07	7.05 ± 0.03	0.36 ± 0.002	0.34 ± 0.003	1.37 ± 0.01	1.86 ± 0.01	0.20 ± 0.001c	0.26 ± 0.001a	0.20 ± 0.001c	0.19 ± 0.002a
Shapiro-Wilk test	W	0.98	0.99	0.20	0.96	0.99	0.99	0.82	0.74	0.98	0.96
	p	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
Kruskal-Wallis test	χ2							1169.90	329.13	781.41	608.93
	p							<0.01	<0.01	<0.01	<0.01