文献类型： 会议论文

第一作者： R Almohamad

作者： R Almohamad ¹ ; F Verheggen; F Francis; E Haubruge;

作者机构： 1.Department of Functional & Evolutionary Entomology, Gembloux Agricultural University, Passage des Deportes 2, B-5030 Gembloux, Belgium

会议名称： XVI international plant protection congress,Volume 1

主办单位：

页码： 306-307

摘要： Most aphidophagous predators, such as syrphids and coccinellids, exploit temporary food resources (aphid colonies) that are patchily distributed and have a short life span (Dixon, 1985). These predatory larvae risk starvation if the aphid colony on which they are feeding get reduced before they complete their development. This could happen when too many eggs are laid in the colony or too late in the development of the colony, i.e., when the aphids are preparing to disperse. Optimal foraging theory predicts that to maximize fitness these predators should lay a few eggs early in the development of an aphid colony (Kindlmann & Dixon, 1993). The present study aims to understand this theory in predatory hoverfly Episyrphus balteatus DeGeer (Diptera: Syrphidae) and to assess the following question: is a predatory hoverfly female able to evaluate the aphid density and adapt its number of eggs laid in a way that assures their offspring?

分类号： S4