Parasite infection drives the evolution of state-dependent dispersal of the host

Ryosuke Iritani, Yoh Iwasa

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Dispersal plays a fundamental role in shaping the ecological processes such as host-parasite interactions, and the understanding of host dispersal tendency leads to that of parasites. Here, we present the result of our study on how the evolutionarily stable dispersal of a host would depend on parasite infection, considering kin competition among neighbours. We show that the evolving dispersal rate might be higher for susceptible than for infected individuals (S-biased dispersal) or vice versa (I-biased dispersal). S-biased dispersal is favoured by strong virulence affecting competitive ability, by high rate of parasite release during dispersal, and by low virulence for infected emigrants (i.e. low virulence affecting dispersal ability), whereas I-biased dispersal is favoured in the opposite situation. We also discuss population structure or between-deme genetic differentiation of the host measured with Wright's FST. In I-biased dispersal, between-deme genetic differentiation decreases with the infection rate, while in S-biased dispersal, genetic differentiation increases with infection rate.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalTheoretical Population Biology
Volume92
DOIs
Publication statusPublished - Mar 1 2014

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parasite
virulence
parasites
genetic variation
infection
host-parasite relationships
population structure
genetic differentiation
host-parasite interaction
competitive ability
rate

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics

Cite this

Parasite infection drives the evolution of state-dependent dispersal of the host. / Iritani, Ryosuke; Iwasa, Yoh.

In: Theoretical Population Biology, Vol. 92, 01.03.2014, p. 1-13.

Research output: Contribution to journalArticle

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