A histopathological and biometric comparison between catfish (Pisces, Ariidae) from a harbor and a protected area, Brazil

Table 2 Biometric data and gonadosomatic index of S. herzbergii caught in São Marcos Bay, Maranhão, Brazil

Sites	Gender	L _t(cm)	L _f(cm)	W _t(g)	W _g(g)	GSI
Reference (A1)	Female	29.85 ± 2.72*	26.29 ± 2.98*	283.45 ± 57.34*	7.936 ± 0.361	2.68 ± 0.26*
	Male	28.85 ± 2.81*	27.29 ± 2.21*	281.25 ± 37.54*	5.434 ± 0.251	1.58 ± 0.12*
Harbor (A2)	Female	20.88 ± 3.22	19.45 ± 2.74	108.50 ± 77.90	0.629 ± 0.447	0.08 ± 0.063
	Male	18.28 ± 8.72	16.25 ± 2.92	105.31 ± 55.60	0.129 ± 0.047	0.02 ± 0.013

*Indicates significant difference between sites (P < 0.05). Total number of catfish = 60. Number of female catfish in: A1 = 15; A2 = 15. Number of male catfish in: A1 = 15; A2 = 15. Biometric data: L_t (total length); L_f (fork length); Wg (gonad weight), and GSI (gonadosomatic index). cm (centimeter); g (gram).