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  The contribution of post-copulatory mechanisms to incipient ecological speciation in sticklebacks

Kaufmann, J., Eizaguirre, C., Milinski, M., & Lenz, T. L. (2015). The contribution of post-copulatory mechanisms to incipient ecological speciation in sticklebacks. Biology Letters, 11(1): 20140933. doi:10.1098/rsbl.2014.0933.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-BC1A-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-BC1B-5
Genre: Journal Article

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Kaufmann_2015.pdf (Publisher version), 267KB
 
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 Creators:
Kaufmann, Joshka1, Author              
Eizaguirre, Christophe1, Author              
Milinski, Manfred1, Author              
Lenz, Tobias L.1, Author              
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1Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445634              

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Free keywords: ecological speciation; gamete precedence; Gasterosteus aculeatus; fertilization success; ecotype
 Abstract: Ecology can play a major role in species diversification. As individuals are adapting to contrasting habitats, reproductive barriers may evolve at multiple levels. While pre-mating barriers have been extensively studied, the evolution of post-mating reproductive isolation during early stages of ecological speciation remains poorly understood. In diverging three-spined stickleback ecotypes from two lakes and two rivers, we observed differences in sperm traits between lake and river males. Interestingly, these differences did not translate into ecotype-specific gamete precedence for sympatric males in competitive in vitro fertilization experiments, potentially owing to antagonistic compensatory effects. However, we observed indirect evidence for impeded development of inter-ecotype zygotes, possibly suggesting an early stage of genetic incompatibility between ecotypes. Our results show that pre-zygotic post-copulatory mechanisms play a minor role during this first stage of ecotype divergence, but suggest that genetic incompatibilities may arise at early stages of ecological speciation.

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Language(s): eng - English
 Dates: 2014-11-062014-12-172015-01-012015-01-14
 Publication Status: Published in print
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 Identifiers: DOI: 10.1098/rsbl.2014.0933
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Title: Biology Letters
  Other : Biol. Lett.
Source Genre: Journal
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Publ. Info: London, [England] : The Royal Society
Pages: - Volume / Issue: 11 (1) Sequence Number: 20140933 Start / End Page: - Identifier: ISSN: 1744-9561 (print)
ISSN: 1744-957X (online)
CoNE: /journals/resource/954925580128