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Resource partitioning of the host fungus Coriolus versicolor by two ciid beetles: the role of odour compounds and host ageing
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Resource partitioning of the host fungus Coriolus versicolor by two ciid beetles: the role of odour compounds and host ageing
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Resource partitioning of the host fungus Coriolus versicolor by two ciid beetles: the role of odour compounds and host ageing
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Journal Article
Resource partitioning of the host fungus Coriolus versicolor by two ciid beetles: the role of odour compounds and host ageing
2000
Overview
The ciid beetles Octotemnus glabriculus and Cis boleti exploit different developmental stages of fruit bodies of their preferred host fungus Coriolus versicolor. Larvae of the smaller beetle, O. glabriculus, mainly use young, expanding, fruit bodies; adults of O. glabriculus are predominantly found in young fruit bodies. By contrast, adults and larvae of the larger beetle, C. boleti, are prevalent in fully developed fruit bodies of C. versicolor. Because fruit bodies of most genets emerge during spring and early summer and mature by autumn, O. glabriculus and C. boleti breed in separated seasons. Adults and larvae of O. glabriculus are abundant in spring and early summer. By contrast, the number of adults and larvae of C. boleti increases gradually from late spring to summer and peaks in autumn. We conducted a field experiment that suggests that the phenological dynamics of C. versicolor fruit bodies drive the separation of breeding seasons between O. glabriculus and C. boleti. Additionally, laboratory experiments revealed that O. glabriculus and C. boleti have differential behavioural responses to odour compounds from young and mature fruit bodies of C. versicolor. We conclude that age-related changes in the chemical composition of fruit bodies may allow O. glabriculus and C. boleti to discriminate among C. versicolor, thus providing a mechanism for the partitioning of the resource.
Publisher
Munksgaard,Munksgaard International Publishers, Ltd,Blackwell
