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Table 4 Comparison of predation rates of N. melanostomus on Dikerogammarus villosus based on factorial ANOVA with the factors trial (single species vs. mixed species) 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
Trial
  20544.067 1 20544.067 6.881 0.011
 Error 194070.532 65 2985.7   
Substratum
  61621.819 1 61621.819 22.974 <0.001
 Error 174342.766 65 2418.931   
Interaction trial x substratum
  5549.039 1 5549.039 1.982 0.164
 Error 181939.994 65 2799.077   
  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