Diaspidid (Hemiptera: Coccoidea) size plasticity as an adaptive life history trait
| Autor: | Nicola A. Mauchline, Rosa C. Henderson, M. G. Hill |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
life history
biology fecundity Actinidia media_common.quotation_subject host plant resistance Zoology Insect Diaspididae biology.organism_classification Fecundity Hemiptera Life history theory developmental biology diaspididae QL1-991 plasticity Insect Science Botany Instar polyphagy Moulting media_common |
| Zdroj: | European Journal of Entomology, Vol 108, Iss 1, Pp 153-159 (2011) |
| ISSN: | 1802-8829 1210-5759 |
| DOI: | 10.14411/eje.2011.018 |
| Popis: | The size and fecundity of Hemiberlesia lataniae (Signoret) (Hemiptera: Diaspididae) on partially resistant and susceptible kiwifruit (Actinidia spp.) varieties was measured. The size ratio of mature H. lataniae grown on a partially resistant genotype, com- pared with those on a susceptible genotype, was 0.67-0.51 for 2 nd instar exuviae area, 0.32 for adult body area and 0.18 for estimated body volume. The fertility ratio was 0.1, but the pre-oviposition period and the size of the crawlers were the same. Diaspidid scale insects' unusual ability to continue growing after the final moult appears to be a key feature allowing these insects to show extreme size plasticity while retaining the ability to reproduce even when very small. These observations challenge current theories of insect development that postulate the need to achieve a critical weight threshold before the final moult. We suggest that this strategy may have assisted the evolution of polyphagy within the Diaspididae. |
| Databáze: | OpenAIRE |
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