Table 2.

Tests for sexual dimorphism of swimbladder and muscle morphology of Batrachomoeus trispinosus

Swimbladder measurement	d.f.	F	P
Length
Left	26	59.61	P<0.0001
Right	24	56.96	P<0.0001
Width
Left	26	26.72	P<0.0001
Right	24	37.41	P<0.0001
Muscle mass
Left	10	0.7422	P=0.4113
Right	10	0.4563	P=0.5163

Results from analyses of covariance of swimbladders of males and females, with the fish's standard length as the covariate. Differences in muscle mass were tested with an analysis of variance using the residuals of muscle mass regressed against body size