Table 1

Statistical analyses of cannibalism rates by first instar larvae and adult females of H. axyridis
First instar larvae Adult females
Analysis Test statistic P-value Test statistic P-value
1- Spatial expansion in Europe F (df) F (df)
Spatial level 0.64 (2) 0.5252 0.20 (2) 0.8173
Population (Spatial level) 0.34 (3) 0.7914 0.15 (3) 0.9279
Density 14.07 (1) <0.0002 1.19 (1) <0.042
Spatial level × Density 2.38 (2) 0.0949 0.78 (2) 0.4556
2- Different types of population
Population type 17.44 (2) <0.0001 0.19 (2) 0.8262
Population (Population type) 0.59 (7) 0.5106 0.72 (7) 0.6482
Density 22.63 (1) <0.0001 4.34 (1) <0.037
Population type × Density 0.34 (2) 0.7066 0.40 (2) 0.6706

Note: Analysis 1- focuses on spatial expansion in Western Europe (invaded area), and analysis 2-compare different types of populations, i.e. native, invasive and biocontrol. Significant P-values at the 5% threshold are shown in bold.

Tayeh et al.

Tayeh et al. BMC Evolutionary Biology 2014 14:15   doi:10.1186/1471-2148-14-15

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