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Females discriminat...
Females discriminate against heterospecific sperm in a natural hybrid zone
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- Cramer, Emily R. A. (författare)
- Univ Oslo, Nat Hist Museum, N-0318 Oslo, Norway.;Smithsonian Migratory Bird Ctr, POB 37012 MRC5503, Washington, DC 20008 USA.;Cornell Lab Ornithol, Ithaca, NY 14850 USA.
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- Ålund, Murielle (författare)
- Uppsala universitet,Zooekologi
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- McFarlane, S. Eryn (författare)
- Uppsala universitet,Zooekologi
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- Johnsen, Arild (författare)
- Univ Oslo, Nat Hist Museum, N-0318 Oslo, Norway.
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- Qvarnström, Anna (författare)
- Uppsala universitet,Zooekologi
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Univ Oslo, Nat Hist Museum, N-0318 Oslo, Norway;Smithsonian Migratory Bird Ctr, POB 37012 MRC5503, Washington, DC 20008 USA.;Cornell Lab Ornithol, Ithaca, NY 14850 USA. Zooekologi (creator_code:org_t)
- 2016-07-05
- 2016
- Engelska.
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Ingår i: Evolution. - : Wiley. - 0014-3820 .- 1558-5646. ; 70:8, s. 1844-1855
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- When hybridization is maladaptive, species-specific mate preferences are selectively favored, but low mate availability may constrain species-assortative pairing. Females paired to heterospecifics may then benefit by copulating with multiple males and subsequently favoring sperm of conspecifics. Whether such mechanisms for biasing paternity toward conspecifics act as important reproductive barriers in socially monogamous vertebrate species remains to be determined. We use a combination of long-term breeding records from a natural hybrid zone between collared and pied flycatchers (Ficedula albicollis and F. hypoleuca), and an in vitro experiment comparing conspecific and heterospecific sperm performance in female reproductive tract fluid, to evaluate the potential significance of female cryptic choice. We show that the females most at risk of hybridizing (pied flycatchers) frequently copulate with multiple males and are able to inhibit heterospecific sperm performance. The negative effect on heterospecific sperm performance was strongest in pied flycatcher females that were most likely to have been previously exposed to collared flycatcher sperm. We thus demonstrate that a reproductive barrier acts after copulation but before fertilization in a socially monogamous vertebrate. While the evolutionary history of this barrier is unknown, our results imply that there is opportunity for it to be accentuated via a reinforcement-like process.
Ämnesord
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Nyckelord
- Cryptic female choice
- hybrid zones
- postcopulatory prezygotic barriers
- reinforcement
- speciation
- sexual selection
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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