Intraguild predation between lady beetles and lacewings: outcomes and consequences vary with focal prey and arena of interaction

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dc.contributor.author Noppe, Christophe
dc.contributor.author Michaud, J. P.
dc.contributor.author De Clercq, Patrick
dc.date.accessioned 2012-08-22T21:39:31Z
dc.date.available 2012-08-22T21:39:31Z
dc.date.issued 2012-08-22
dc.identifier.uri http://hdl.handle.net/2097/14385
dc.description.abstract We examined reciprocal intraguild predation (IGP) and cannibalism among various combinations of Coleomegilla maculata DeGeer and Chrysoperla carnea Stephens larvae as they developed feeding on greenbugs, Schizaphis graminum Rondani, on sorghum plants in microcosms. Pairs of C. maculata larvae suppressed aphids better than pairs of C. carnea larvae or heterospecific larval pairs and yielded the highest rate of plant survival. IGP by C. carnea larvae occurred mostly in the first instar, whereas C. maculata larvae were more aggressive in later instars. Although C. carnea was the superior intraguild predator, winning 62.7% of contests in microcosms, this value increased to 88.9% when the experiment was repeated in petri dishes without plant material, regardless of whether greenbugs or eggs of Ephestia kuehniella Zeller were offered as focal prey. Provision in petri dishes of the sessile, higher quality prey (Ephestia) as opposed to greenbugs, improved the survival of solitary larvae and delayed cannibalism and IGP until later developmental stages in both species. Larvae of C. maculata that cannibalized took longer to develop and weighed less at pupation, independent of the arena or prey offered. Although larvae of C. carnea did not pay a cost for cannibalism or IGP in microcosms, there were some negative developmental effects of IGP in petri dishes, particularly on the Ephestia diet. These results illustrate how the plant, as a substrate, can mediate the strength of IGP interactions and how the relative suitability of the focal prey can influence both the timing and consequences of cannibalism and IGP. en_US
dc.relation.uri http://esa.publisher.ingentaconnect.com/content/esa/aesa/2012/00000105/00000004/art00007 en_US
dc.rights Permission to archive granted by the Entomological Society of America, August 14, 2012. en_US
dc.subject Cannibalism en_US
dc.subject Coccinellidae en_US
dc.subject Chrysopidae en_US
dc.subject Ephestia kuehniella en_US
dc.subject Schizaphis graminum en_US
dc.title Intraguild predation between lady beetles and lacewings: outcomes and consequences vary with focal prey and arena of interaction en_US
dc.type Article (publisher version) en_US
dc.date.published 2012 en_US
dc.citation.doi doi:10.1603/AN11165 en_US
dc.citation.epage 571 en_US
dc.citation.issue 4 en_US
dc.citation.jtitle Annals of the Entomological Society of America en_US
dc.citation.spage 562 en_US
dc.citation.volume 105 en_US
dc.contributor.authoreid jpmi en_US

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