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

Eizaguirre, Christophe, Lenz, Tobias L., Sommerfeld, Ralf D., Harrod, Chris, Kalbe, Martin and Milinski, Manfred (2011) Parasite diversity, patterns of MHC II variation and olfactory based mate choice in diverging three-spined stickleback ecotypes. Evolutionary Ecology, 25 (3, SI). pp. 605-622. DOI 10.1007/s10682-010-9424-z.

[img] Text
Eizaguirre_et_al_2010_Evol_Ecol.pdf - Published Version
Restricted to Registered users only

Download (402Kb) | Contact

Supplementary data:

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.

Document Type: Article
Keywords: Ichthyology; Habitat heterogeneity; Parasite community; Major histocompatibility complex; Local adaptations; Mate choice; Parasite diversity; Speciation; Three-spined stickleback
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1007/s10682-010-9424-z
ISSN: 0269-7653
Date Deposited: 14 Dec 2010 06:50
Last Modified: 04 Jan 2017 13:36
URI: http://oceanrep.geomar.de/id/eprint/10503

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...