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Table 1 ANCOVA for canal diameter and neuromast size (length, width) in the supraorbital and mandibular canals in two species

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

  N R 2 F d.f. P
Canal diameter (combined) 358 0.83    
Species    175.4131 1, 354 <.0001
SL    732.5361 1, 354 <.0001
Species x SL    77.8231 1, 354 <.0001
Canal diameter (SO) 184 0.85    
Species    128.5339 1, 180 <.0001
SL    391.6134 1, 180 <.0001
Species x SL    36.1964 1, 180 <.0001
Canal diameter (MD) 174 0.83    
Species    62.1329 1, 170 <.0001
SL    369.4595 1, 170 <.0001
Species x SL    43.2358 1, 170 <.0001
  N R 2 F d.f. P
Neuromast length (combined) 389 0.61    
Species    0.0775 1, 385 0.7809
SL    494.8616 1, 385 <.0001
Species x SL    3.7681 1, 385 0.0530
Neuromast length (SO) 194 0.69    
Species    6.0854 1, 190 0.0145
SL    346.0935 1, 190 <.0001
Species x SL    0.4571 1, 190 0.4998
Neuromast length (MD) 195 0.73    
Species    5.1958 1, 191 0.0237
SL    405.6425 1, 191 <.0001
Species x SL    7.987 1, 191 0.0052
  N R 2 F d.f. P
Neuromast width (combined) 389 0.89    
Species    179.7582 1, 385 <.0001
SL    1548.252 1, 385 <.0001
Species x SL    135.6519 1, 385 <.0001
Neuromast width (SO) 194 0.9    
Species    96.0182 1, 190 <.0001
SL    809.9263 1, 190 <.0001
Species x SL    71.6976 1, 190 <.0001
Neuromast width (MD) 195 0.91    
Species    104.6486 1, 191 <.0001
SL    916.1915 1, 191 <.0001
Species x SL    79.312 1, 191 <.0001
  1. 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. All data were found to be normal. Significance = P <0.05. The Johnson-Neyman procedure was used to determine the region of non-significance for fish size for ANCOVAs with significant interaction terms (indicating heterogeneity of slopes, see text and Table 3 for additional details). See Figure 10 and Table 2 for ANOVA results and individual regressions.