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Table 3 Results of Johnson-Neyman procedure for identifying a region of non-significance in fish size (mm SL) for canal diameter and neuromast shape

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

   Variables  
  Canal diameter Neuromast length Neuromast width
Canals    
SO Canal >8.0 mm SL N/A >9.4 mm SL
MD Canal >9.9 <12.6* >9.4
Canal Portions    
Nasal (SO) >10.3 N/A >10.0
Frontal (SO) >7.8 N/A >9.4
Dentary (MD) >10.1 <12.5* >9.5
Anguloarticular (MD) >10.5 N/A >9.8
Canal Segments    
SO1 >10.3 N/A >10.0
SO2 N/A N/A >10.0
SO3 >8.2 N/A >10.1
SO4 >12.2 N/A >11.8
SO5 >9.3 >12.7** >9.8
MD1 N/A N/A >10.3
MD2 >10.9 N/A >10.0
MD3 >11.3 <11.9* >10.2
MD4 >11.5 N/A >10.4
MD5 >10.5 N/A >9.8
  1. This statistical procedure was carried out for data analyzed at each level in the lateral line system (canal, canal portion, canal segment; see text for additional information) in the supraorbital (SO) and mandibular (MD) canals for which ANCOVAs demonstrated significantly different slopes between species. Numerical values represent the fish size (mm SL) above which Aulonocara has wider canal diameters, longer neuromast lengths, and/or wider neuromast widths, except as noted. *fish size (mm SL) below which the variable has a higher value in Aulonocara than in Tramitichromis. **fish size (mm SL) above which the variable has a higher value in Tramitichromis than in Aulonocara. N/A indicates that the slopes comparing trends for Aulonocara and Tramitichromis were not statistically different, so the Johnson-Neyman procedure was not used.