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Table 5 Comparison of predation rates of N. melanostomus for single species predation trials based on factorial ANOVA with the factors species (G. pulex vs. D. villosus) and substratum (absence vs. presence)

From: Synergistic impacts by an invasive amphipod and an invasive fish explain native gammarid extinction

 Factor SS df MS F p
Species
  59950.019 1 59950.019 59.165 p < 0.001
 Error 82074.539 81 1013.266   
Substratum
  94868.898 1 94868.898 48.913 p < 0.001
 Error 157103.081 81 1939.544   
Interaction species x substratum
  12026.53 1 12026.53 7.145 0.009
 Error 136349.47 81 1683.327   
  1. Italic values indicate significance of p value (p < 0.05)
  2. SS sum of squares, df degrees of freedom, MS mean square, F F value, p p value of single factors and their interactions, respectively