PMID: 9172824May 1, 1997Paper

Host-parasite dynamics and the evolution of host immunity and parasite fecundity strategies

Bulletin of Mathematical Biology
V KaitalaW M Getz

Abstract

We explore evolutionarily stable co-evolution of host-macroparasite++ interactions in a discrete-time two-species population dynamics model, in which the dynamics may be stable, cyclic or chaotic. The macroparasites are assumed to harm host individuals through decreased reproductive output. Hosts may develop costly immune responses to defend themselves against parasites. Parasites compete with conspecifics by adjusting their fecundities. Overall, the presence of both parasites and the immune response in hosts produces more stable dynamics and lower host population sizes than that observed in the absence of the parasites. In our evolutionary analyses, we show that maximum parasite fecundity is always an evolutionarily stable strategy (ESS), irrespective of the type of population interaction, and that maximum parasite fecundity generally induces a minimum parasite population size through over-exploitation of the host. Phenotypic polymorphisms with respect to immunity in the host species are common and expected in ESS host strategies: the benefits of immunication depend on the frequency of the immune hosts in the population. In particular, the steady-state proportions of immune hosts depend, in addition to all the parameters of th...Continue Reading

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Citations

Nov 11, 1999·Parasitology Today·J Laakkonen
Aug 10, 2000·Trends in Ecology & Evolution·H Proctor, I Owens
Jul 8, 2011·Parasitology·Dieter J A Heylen, Erik Matthysen
Jan 6, 2012·Parasitology·D J A HeylenE Matthysen
Dec 24, 2004·Journal of Theoretical Biology·Travis C PorcoAlison P Galvani
Jul 22, 2005·Journal of Evolutionary Biology·A JacotM W G Brinkhof
Apr 15, 2011·Biology Letters·Melissah RoweMathieu Giraudeau
Dec 24, 2014·Ecology and Evolution·Hanna M V Granroth-WildingEmma J A Cunningham
Dec 17, 2014·Ecology and Evolution·Mark C MainwaringD Charles Deeming

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