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  Parasite diversity, patterns of MHC II variation and olfactory based mate choice in diverging three-spined stickleback ecotypes

Eizaguirre, C., Lenz, T. L., Sommerfeld, R. D., Harrod, C., Kalbe, M., & Milinski, M. (2011). Parasite diversity, patterns of MHC II variation and olfactory based mate choice in diverging three-spined stickleback ecotypes. Evolutionary Ecology of Fishes: Diversification, Adaptation and Speciation, 605-622. doi:10.1007/s10682-010-9424-z.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D3CB-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D3CC-B
Genre: Journal Article

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Eizaguirre_2011.pdf (Publisher version), 384KB
 
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 Creators:
Eizaguirre, Christophe1, Author              
Lenz, Tobias L.1, Author              
Sommerfeld, Ralf D.1, Author              
Harrod, Chris2, 3, Author              
Kalbe, Martin4, Author              
Milinski, Manfred1, Author              
Affiliations:
1Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445634              
2Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              
3Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445635              
4Research Group Parasitology, Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445643              

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Free keywords: habitat heterogeneity; parasite community; major histocompatibility complex; local adaptations; mate choice; parasite diversity; speciation; three-spined stickleback
 Abstract: Ecological speciation has been the subject of intense research in evolutionary biology but the genetic basis of the actual mechanism driving reproductive isolation has rarely been identified. The extreme polymorphism of the major histocompatibility complex (MHC), probably maintained by parasite-mediated selection, has been proposed as a potential driver of population divergence. We performed an integrative field and experimental study using three-spined stickleback river and lake ecotypes. We characterized their parasite load and variation at MHC class II loci. Fish from lakes and rivers harbor contrasting parasite communities and populations possess different MHC allele pools that could be the result of a combined action of genetic drift and parasite-mediated selection. We show that individual MHC class II diversity varies among populations and is lower in river ecotypes. Our results suggest the action of homogenizing selection within habitat type and diverging selection between habitat types. Finally, reproductive isolation was suggested by experimental evidence: in a flow channel design females preferred assortatively the odor of their sympatric male. This demonstrates the role of olfactory cues in maintaining reproductive isolation between diverging fish ecotypes.

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Language(s): eng - English
 Dates: 2011-05
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 564927
DOI: 10.1007/s10682-010-9424-z
Other: 2835/S 39178
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Title: Evolutionary Ecology of Fishes: Diversification, Adaptation and Speciation
Source Genre: Issue
 Creator(s):
Mehner, Thomas, Editor
Freyhof, Jörg, Editor
Reichard, Martin, Editor
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 605 - 622 Identifier: -

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Title: Evolutionary Ecology
  Alternative Title : Evol Ecol
Source Genre: Journal
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Pages: - Volume / Issue: 25 (3 (Spec. iss. S 1)) Sequence Number: - Start / End Page: - Identifier: ISSN: 0269-7653 (print)
ISSN: 1573-8477 (online)