Heterochrony, modularity, and the functional evolution of the mechanosensory lateral line canal system of fishes

Table 2 Results of ANOVA for canal diameter and neuromast size (length, width) in the SO and MD canals in Tramitichromis and Aulonocara

	N	Regression	R ²	P
Canal diameter (combined)
Tramitichromis	175	CD = 8.11xSL + 20.24	0.66	<.0001
Aulonocara	183	CD = 15.96xSL-39.27	0.76	<.0001
Canal diameter (SO)
Tramitichromis	90	CD = 7.9xSL + 25.16	0.71	<.0001
Aulonocara	94	CD = 14.81xSL-17.83	0.75	<.0001
Canal diameter (MD)
Tramitichromis	85	CD = 8.41xSL + 14.16	0.64	<.0001
Aulonocara	89	CD = 17.16xSL-61.74	0.78	<.0001
	N	Regression	R ²	P
Neuromast length (combined)
Tramitichromis	180	NML = 9.90xSL-12.99	0.51	<.0001
Aulonocara	209	NML = 8.31xSL + 5.73	0.65	<.0001
Neuromast length (SO)
Tramitichromis	90	NML = 9.57xSL + 8.68	0.62	<.0001
Aulonocara	104	NML = 8.90xSL + 8.77	0.71	<.0001
Neuromast length (MD)
Tramitichromis	90	NML = 10.23xSL-34.67	0.7	<.0001
Aulonocara	105	NML = 7.71xSL + 2.91	0.7	<.0001
	N	Regression	R ²	P
Neuromast width (combined)
Tramitichromis	180	NMW = 9.44xSL-21.67	0.84	<.0001
Aulonocara	209	NMW = 17.38xSL-88.66	0.87	<.0001
Neuromast width (SO)
Tramitichromis	90	NMW = 9.56xSL-16.92	0.89	<.0001
Aulonocara	104	NMW = 17.66xSL-85.10	0.87	<.0001
Neuromast width (MD)
Tramitichromis	90	NMW = 9.31xSL-26.42	0.88	<.0001
Aulonocara	105	NMW = 17.08xSL-92.06	0.88	<.0001

Analysis was carried out for supraorbital (SO) and mandibular (MD) canals together (combined) or individually in Tramitichromis and Aulonocara. SL = standard length (fish size) in mm. Significance level = P <0.05. All data were normally distributed. See Figures 10 and 12 and Tables 1 and 5 for results of ANCOVAs. CD, canal diameter; NML, neuromast length; NMW, neuromast width.

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