When parasitoids deal with the spatial distribution of their hosts: consequences for both partners  

作　　者：Philippe Louapre Cecile Le Lann Thierry Hance 

机构地区：[1]Earth and Life Institue,Universite Catholique de Louvain,Louvain-la-Neuve,Belgium [2]CNRS,Biogeosciences UMR 6282,Universite Bourgogne Franche-Comte,Dijon,France [3]UMR CNRS 6553 Ecobio,University of Rennes 1,Rennes Cedex,France

出　　处：《Insect Science》2019年第5期923-931,共9页昆虫科学（英文版）

摘　　要：Insect parasitoids developing inside hosts face a true challenge: hosts are scattered in the field and their localization and selection require the use of complex and sometime confusing information. It was assumed for a long time that small-brained organisms like parasitoids have evolved simple and efficient behavioral mechanisms, leading them to be adapted to a given ecological situation, for example, the spatial distribution o f hosts in the habitat. However, hosts are not static and their distribution may also vary through generations and within the life of parasitoid individuals. We investigated if and how parasitoids deal with such a spatial com plexity in a m esocosm experiment. We used the Aphidius rhopalosiphi/Sitobion avenae parasitoid/host system to investigate if parasitoid females experiencing different host aggregation levels exhibit different foraging behaviors independently of the number of hosts in the environment. We showed that A. rhopalosiphi females exploited hosts more intensively both within and among patches at higher host aggregation levels. We discussed the adaptiveness of such behaviors in the light of evolution and biological control.

关 键 词：APHIDIUS rhopalosiphi FORAGING behavior PARASITOID sequential adjustment Sitobion AVENAE spatial distribution 

分 类 号：Q[生物学]