Psyche: A Journal of Entomology / 2012 / Article / Tab 2

Research Article

Competition for Aphid Prey between Different Lady Beetle Species in a Laboratory Arena

Table 2

Number of aphids (mean ± SE) consumed by C. trifasciata and C. maculata in different competition contexts (see text for details). Means in each column followed by the same letter are not significantly different from each other (Tukey’s HSD tests, ). Nonnative species are printed in bold font.

Competition contextC. trifasciataC. maculata

Alone1.30 ± 0.34ab1.60 ± 0.37ab
C. trifasciata 1.70 ± 0.34ab0.40 ± 0.22b
C. trifasciata*1.40 ± 0.27abN/A
C. maculata2.60 ± 0.37ab1.60 ± 0.31ab
C. maculata*N/A1.50 ± 0.27ab
C. septempunctata1.00 ± 0.42b1.80 ± 0.36a
H. axyridis1.30 ± 0.37ab1.00 ± 0.27ab
H. convergens2.60 ± 0.31a1.55 ± 0.26ab
H. variegata1.20 ± 0.36ab1.95 ± 0.51a
P. quatuordecimpunctata2.00 ± 0.39ab1.80 ± 0.42ab

P0.00730.0262
F2.872.33
DF8, 818, 81

*When beetles were paired with conspecifics, the data are listed separately for each beetle in the pair.

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