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Sympatric coexistence of sibling species Harmonia yedoensis and H. axyridis (Coleoptera: Coccinellidae) and the roles of maternal investment through egg and sibling cannibalism
- Article from:
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European Journal of Entomology
- Article date:
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July 1, 2008
- Author:
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;
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Copyright informationCopyright Institute of Entomology 2008. Provided by ProQuest LLC. (Hide copyright information)
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Key words. Coccinellidae, coexistence, Harmonia axyridis, Harmonia yedoensis, sibling cannibalism, sibling species
Abstract. The sibling species H. yedoensis Takizawa coexists sympatrically and simultaneously with H. axyridis only on pine trees in Japan. To elucidate the mechanisms enabling coexistence of these two sympatric sibling species, a laboratory experiment was performed that focused on differences in their maternal investment through eggs and the role of sibling cannibalism. The egg size (volume) of H. yedoensis was 24.91% larger than that of H. axyridis. Cluster size in H. axyridis was significantly larger than that in H. yedoensis; however, the total number of eggs and ...
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