Role of intraguild predation in aphidophagous guilds

0388676 - ÚVGZ 2013 RIV DE eng J - Journal Article
Hemptinne, J. L. - Magro, A. - Saladin, C. - Dixon, Anthony F. G.
Role of intraguild predation in aphidophagous guilds.
Journal of Applied Entomology. Roč. 136, č. 3 (2012), s. 161-170. ISSN 0931-2048. E-ISSN 1439-0418
Institutional support: RVO:67179843
Keywords : aphidophagous guilds * cost of intraguild predation * interspecific predation * intraguild predation * ladybird beetles * omnivory
Subject RIV: EH - Ecology, Behaviour
Impact factor: 1.560, year: 2012

The concept of intraguild predation (IGP) appeared in 19871989 to describe trophic interactions within a guild of arthropods inhabiting a sand dune desert: consumers B prey on consumers A and both of them prey on a common resource. Theory predicts that the two types of consumers should only coexist if consumer A is more efficient in the conversion of the common resource than B. As a consequence, this resource is more abundant in the presence than in the absence of intraguild predators. Such a theoretical prediction probably explains the vivid interest shown by ecologists involved in biological control for IGP. It is therefore not surprising that many papers report on IGP among natural enemies of aphids. A close examination of these reported cases indicates that they rarely fulfil the theoretical requirements for IGP. That is, guilds of aphidophagous insects are rarely the theatre of IGP but frequently of interspecific predation. This is confirmed by experimental assessment of the cost of attacking and eating intraguild prey instead of extraguild in ladybird beetles.
Permanent Link: http://hdl.handle.net/11104/0217590