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Differential cannibalism and population dynamics in a host-parasitoid system

✍ Scribed by D. J. Reed; M. Begon; D. J. Thompson

Publisher: Springer-Verlag
Year: 1996
Tongue: English
Weight: 532 KB
Volume: 105
Category: Article
ISSN: 0029-8549
DOI: 10.1007/bf00328545

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✦ Synopsis

The effects of host cannibalism on a host-parasitoid system were explored through experiment and modelling. In individual encounters between parasitized and unparasitized Plodia interpunctella larvae, parasitized larvae were more likely to be cannibalized. Inclusion of this differential cannibalism into a simple Lotka-Volterra-type model of host-parasitoid population dynamics generates alternative stable states-including stable coexistence and extinction of the parasitoid - which depend on starting conditions. Possible mechanisms for differential cannibalism, and its implications for studies of host-parasitoid populations and biological control programmes are discussed.

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