Tuesday, December 11, 2007 - 1:40 PM
1025

Group dynamics of entomopathogenic nematodes: What we can learn from the slithering herd?

Edwin E. Lewis, eelewis@ucdavis.edu, University of California, Davis, Nematology, Entomology, 1 Shields Ave, Davis, CA, Fushing Heish, fushing@wald.ucdavis.edu, University of California, Davis, Statistics, 1 Shields Ave, Davis, CA, David Shapiro-Ilan, dshapiro@saa.ars.usda.gov, USDA-ARS, SE Fruit and Tree Nut Research Laboratory, 21 Dunbar Road, Byron, GA, Glen Stevens, gnstevens@ucdavis.edu, University of Califonia - Davis, Nematology, 479 Hutchison Hall, University of Califonia Davis, Davis, CA, and James Campbell, cambell@usgmrl.ksu.edu, Grain Marketing & Production Research Center, Biological Research Unit, 1515 College Av, Manhattan, KS.

We employed logistical regression modeling and a group-event history model to describe the group dynamics of entomopathogenic nematodes (EPNs) in the context of risk sensitive foraging. When confronted with the decision of whether or not to invade hosts of varying quality, we argue that to invade a host that is not already infected is a “risk-prone” foraging decision. We will discuss the risks and rewards of various infection decisions by EPNs. Further, it is likely that infection decisions have great influence on the distribution of EPNs in the field.



Species 1: Rhabditida Steinernematidae Steinernema spp
Species 2: Rhabditida Heterorhabditidae Heterorhabditis spp

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