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Table 1 Assignment success under alternative CVA models

From: Shape based assignment tests suggest transgressive phenotypes in natural sculpin hybrids (Teleostei, Scorpaeniformes, Cottidae)

Assigned Group Broel Naaf Invasive BI Hybrids CVA model
Broel 90.6 1.3 2.5 25.8 Based on parental populations
Naaf 4.3 93.4 0.0 11.3  
Invasive 0.9 0.0 92.5 25.8  
n.s. 4.3 5.3 5.0 37.1  
Broel 87.2 5.3 0.0 1.6 Including parental groups and hybrids
Naaf 2.6 89.5 0.0 1.6  
Invasive 0.9 0.0 85.4 6.5  
BI hybrid 6.8 1.3 12.2 83.9  
n.s. 2.6 3.9 0.0 6.5  
  1. Assignment of sculpins to their population of origin based on body shape. A model based only on the differentiation of parental populations is very effective in identifying pure sculpins but assigns the majority of hybrids to pure populations as false positives. A more complex model that includes the shape components specific to hybrids correctly identifies the majority of all hybrids. The overall success of parental group assignment is decreased when hybrids are taken into account as they overlap with parental phenotypic values.