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Exploring the Lotka-Volterra Competition Model using Two Species of Parasitoid Wasps

By Christopher Beck1, Judy Guinan2, Lawrence Blumer3, Robert Matthews4

1. Emory University 2. Radford University 3. Morehouse College 4. University of Georgia

Experiment included in Teaching Issues and Experiments in Ecology (TIEE) Volume 2

Listed in Teaching Materials | resource by group Ecological Society of America

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Version 1.0 - published on 05 Jan 2018 doi:10.25334/Q45667 - cite this

Licensed under CC Attribution-NonCommercial-ShareAlike 4.0 International according to these terms

Description

Laboratory exercise in which students collect data on parasitoid wasps and fit Lotka-Volterra competition models.  The authors' abstract:

In this investigation, students first design experiments to examine intraspecific and interspecific competition using two species of parasitoid wasps. Second, students are guided to a consensus experiment that examines the effect of both types of competition on reproductive output in the parasitoids. Third, the students conduct the consensus experiment in which one or two females are placed on a single host, alone, with conspecific competitors, or with interspecific competitiors. In subsequent labs, students check cultures for emergence of new adults. Six weeks later, students gather data on the number of offspring produced by females under each of the initial densities of founding females. The resulting data are used to estimate the parameters of the Lotka-Volterra competition model. The predictions of the model are then compared to the outcome of interspecific competition treatments. Information is also included on using the appropriate statistical analyses to compare the relative importance of interspecific and intraspecific competition on offspring production.

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