Divergent Selection and Then What Not : The Conundrum of Missing Reproductive Isolation in Misty Lake and Stream Stickleback
Joint Authors
Delcourt, Matthieu
Hendry, Andrew P.
Räsänen, Katja
Chapman, Lauren J.
Source
International Journal of Ecology
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-03-08
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Biology
Abstract EN
In ecological speciation, reproductive isolation evolves as a consequence of adaptation to different selective environments.
A frequent contributor to this process is the evolution of positive assortative mate choice between ecotypes.
We tested this expectation for lake and inlet stream threespine stickleback (Gasterosteus aculeatus) from the Misty system (Vancouver Island, Canada), which show strong genetically based adaptive divergence and little genetic exchange in nature.
This, and work on other stickleback systems, led us to expect positive assortative mating.
Yet, our standard “no-choice” laboratory experiment on common-garden fish revealed no evidence for this—despite divergence in traits typically mediating assortative mating in stickleback.
These results remind us that divergent natural selection may not inevitably lead to the evolution of positive assortative mate choice.
The apparent lack of strong and symmetric reproductive barriers in this system presents a conundrum: why are such barriers not evident despite strong adaptive divergence and low gene flow in nature?
American Psychological Association (APA)
Räsänen, Katja& Delcourt, Matthieu& Chapman, Lauren J.& Hendry, Andrew P.. 2012. Divergent Selection and Then What Not : The Conundrum of Missing Reproductive Isolation in Misty Lake and Stream Stickleback. International Journal of Ecology،Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-506635
Modern Language Association (MLA)
Räsänen, Katja…[et al.]. Divergent Selection and Then What Not : The Conundrum of Missing Reproductive Isolation in Misty Lake and Stream Stickleback. International Journal of Ecology No. 2012 (2012), pp.1-14.
https://search.emarefa.net/detail/BIM-506635
American Medical Association (AMA)
Räsänen, Katja& Delcourt, Matthieu& Chapman, Lauren J.& Hendry, Andrew P.. Divergent Selection and Then What Not : The Conundrum of Missing Reproductive Isolation in Misty Lake and Stream Stickleback. International Journal of Ecology. 2012. Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-506635
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-506635