@article{Luo2005Stron-6806,
  year={2005},
  doi={10.1093/jhered/esi042},
  title={Strong Reproductive Skew Among Males in the Multiply Mated Swordtail Xiphophorus multilineatus (Teleostei)},
  number={4},
  volume={96},
  issn={0022-1503},
  journal={Journal of Heredity},
  pages={346--355},
  author={Luo, Jing and Sanetra, Matthias and Schartl, Manfred and Meyer, Axel}
}

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    <dc:contributor>Luo, Jing</dc:contributor>
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    <dc:creator>Meyer, Axel</dc:creator>
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    <dcterms:title>Strong Reproductive Skew Among Males in the Multiply Mated Swordtail Xiphophorus multilineatus (Teleostei)</dcterms:title>
    <dcterms:issued>2005</dcterms:issued>
    <dc:creator>Sanetra, Matthias</dc:creator>
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    <dc:contributor>Meyer, Axel</dc:contributor>
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    <dc:contributor>Sanetra, Matthias</dc:contributor>
    <dcterms:abstract xml:lang="eng">Male swordtails in the genus Xiphophorus display a conspicuous ventral elongation of the caudal fin, the sword, which arose through sexual selection due to female preference. Females mate regularly and are able to store sperm for at least 6 months. If multiple mating is frequent, this would raise the intriguing question about the role of female choice and male-male competition in shaping the mating systemof these fishes. Size-dependent alternate mating strategies occur in Xiphophorus; one such strategy is courtship with a sigmoid display by large dominant males, while the other is gonopodial thrusting, in which small subordinate males sneak copulations. Using microsatellite markers, we observed a frequency of multiple paternity in wild-caught Xiphophorus multilineatus in 28% of families analyzed, but the actual frequency of multiple mating suggested by the correction factor PrDM was 33%. The number of fathers contributing genetically to the brood ranged from one to three. Compared to other species in the family Poeciliidae, both frequency and degree of multiple paternity were low. Paternity was found to be highly skewed, with one male on average contributing more than 70% to the offspring. Hence in this Xiphophorus mating system, typically one male dominates and sneaker males do not appear to be particularly effective. Postcopulatory mechanisms, however, such as sperm competition, are also indicated by our data, using sex-linked phenotypes among the offspring.</dcterms:abstract>
    <dc:contributor>Schartl, Manfred</dc:contributor>
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    <dcterms:bibliographicCitation>First publ. in: Journal of Heredity 96 (2005), 4, pp. 346 355</dcterms:bibliographicCitation>
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    <dc:creator>Schartl, Manfred</dc:creator>
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