Table 2.

Distance matrices for opercle Procrustes landmark data derived from canonical variate analysis (CVA) of groups defined by habitat occupation

	f	b	m
f	–	7.5831 (<0.0001)	9.0013 (<0.0001)
b	0.0270 (0.0120)	–	5.4069 (<0.0001)
m	0.0642 (<0.0001)	0.0542 (<0.0001)	–

P‐values (shown in parenthesis) calculated by 1000 random permutations per test to determine statistical significance of differences between pairs of habitats. f: freshwater; b: brackish; m: marine. Above diagonal is Mahalanobis distances; below diagonal is Procrustes distances.