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          Institute: MPI für Evolutionsbiologie     Collection: Evolutionary ecology     Display Documents

ID: 233808.0, MPI für Evolutionsbiologie / Evolutionary ecology
How a complex life cycle can improve a parasite's sex life
Authors:Rauch, G.; Kalbe, M.; Reusch, T. B. H.
Date of Publication (YYYY-MM-DD):2005-07
Title of Journal:Journal of Evolutionary Biology
Journal Abbrev.:J. evol. biol.
Issue / Number:4
Start Page:1069
End Page:1075
Review Status:not specified
Audience:Not Specified
Abstract / Description:How complex life cycles of parasites are maintained is still a fascinating and unresolved topic. Complex life cycles using three host species, free-living stages, asexual and sexual reproduction are widespread in parasitic helminths. For such life cycles, we propose here that maintaining a second intermediate host in the life cycle can be advantageous for the individual parasite to increase the intermixture of different clones and therefore decrease the risk of matings between genetically identical individuals in the definitive host. Using microsatellite markers, we show that clone mixing occurs from the first to the second intermediate host in natural populations of the eye-fluke Diplostomum pseudospathaceum. Most individuals released by the first intermediate host belonged to one clone. In contrast, the second intermediate host was infected with a diverse array of mostly unique parasite genotypes. The proposed advantage of increased parasite clone intermixture may be a novel selection pressure favouring the maintenance of complex life cycles.
Free Keywords:complex life cycles; Diplostomum pseudospathaceum; microsatellites; parasite clonal diversity
External Publication Status:published
Document Type:Article
Affiliations:MPI für Limnologie/Abt. Evolutionsökologie
Relations:Is Version Of-EDOCID:268542
Identifiers:ISSN:1010-061X [ID-No:1]
DOI:10.1111/j.1420-9101.2005.00895.x [ID-No:2]
LOCALID:2367/S 38389 [Listen-Nummer/S-Nummer]
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