Summary
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1)
Life tables of the predatory ladybird beetleHarmonia axyridis were analysed by taking samples from twenty or twenty four sites colonized by eight species of aphids for two years.
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Larval mortality was a key factor in theH. axyridis populations. Mortality of all the stages tended to be density-dependent when life cycles were divided into four developmental stages, except in the case of mortality at hatching due to sibling cannibalism.
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3)
Sibling and non-sibling cannibalism played an important role on population stability and persistence.
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Osawa, N. Population field studies of the aphidophagous ladybird beetleHarmonia axyridis (Coleoptera: Coccinellidae): Life tables and key factor analysis. Res Popul Ecol 35, 335–348 (1993). https://doi.org/10.1007/BF02513605
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DOI: https://doi.org/10.1007/BF02513605