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Table 4 ANCOVA for canal diameter and neuromast size in the SO and MD canals combined in Tramitichromis and Aulonocara

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

 

N

R2

F

d.f.

P-value

Canal diameter ( Tramitichromis )

175

0.67

   

SL

  

348.0619

1, 171

<.0001

Canal

  

5.0408

1, 171

0.026

SL x Canal

  

0.3324

1, 171

0.5650

Canal diameter ( Aulonocara )

183

0.77

   

SL

  

582.8945

1, 179

<.0001

Canal

  

5.708

1, 179

0.0179

SL x Canal

  

3.1312

1, 179

0.0785

 

N

R 2

F

d.f.

P -value

Neuromast length ( Tramitichromis )

180

0.74

   

SL

  

338.8333

1, 176

<.0001

Canal

  

149.0871

1, 176

<.0001

SL x Canal

  

0.3759

1, 176

0.5406

Neuromast length ( Aulonocara )

209

0.73

   

SL

  

487.6754

1, 205

<.0001

Canal

  

54.3751

1, 205

<.0001

SL x Canal

  

2.4841

1, 205

0.1165

 

N

R 2

F

d.f.

P -value

Neuromast width ( Tramitichromis )

180

0.89

   

SL

  

1362.844

1, 176

<.0001

Canal

  

76.2438

1, 176

<.0001

SL x Canal

  

0.2324

1, 176

0.6304

Neuromast width ( Aulonocara )

209

0.88

   

SL

  

1441.915

1, 205

<.0001

Canal

  

16.9214

1, 205

<.0001

SL x Canal

  

0.4012

1, 205

0.5272

  1. Analysis was carried out for supraorbital (SO) and mandibular (MD) canals combined in Tramitichromis and in Aulonocara. SL = Standard length (fish size) in mm. All data were normally distributed. Significance = P <0.05. The interaction terms in these ANCOVAs were significant, so the Johnson-Neyman technique was not used. See Figure 12 and Table 2 for ANOVA results and individual regressions.