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Sperm swimming velocity predicts competitive fertilization success in the green swordtail Xiphophorus helleri

Gasparini, Clelia ; Simmons, Leigh W ; Beveridge, Maxine ; Evans, Jonathan P Halsey, Lewis George

PloS one, 2010-08, Vol.5 (8), p.e12146-e12146 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
Sperm swimming velocity predicts competitive fertilization success in the green swordtail Xiphophorus helleri
Autor: Gasparini, Clelia ; Simmons, Leigh W ; Beveridge, Maxine ; Evans, Jonathan P
Halsey, Lewis George
Assuntos: Animal behavior ; Animals ; Artificial insemination ; Competition ; Cyprinodontiformes - physiology ; Eggs ; Ejaculation - physiology ; Evolutionary Biology/Animal Behavior ; Evolutionary Biology/Evolutionary Ecology ; Evolutionary Biology/Sexual Behavior ; Female ; Fertilization ; Fertilization - physiology ; Fish ; Fishes ; Freshwater ; Linear Models ; Male ; Males ; Mating ; Mating Preference, Animal - physiology ; Reproduction (biology) ; Sperm ; Sperm competition ; Sperm Motility ; Spermatozoa ; Spermatozoa - cytology ; Swimming ; Velocity ; Xiphophorus ; Xiphophorus helleri ; Xiphophorus hellerii ; Xiphophorus montezumae
É parte de: PloS one, 2010-08, Vol.5 (8), p.e12146-e12146
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Conceived and designed the experiments: LWS JPE. Performed the experiments: CG. Analyzed the data: LWS JPE. Contributed reagents/materials/analysis tools: LWS MB. Wrote the paper: CG MB JPE.
Descrição: Sperm competition is expected to favour the evolution of traits that influence the performance of sperm when they compete to fertilize a female's eggs. While there is considerable evidence that selection favours increases in sperm numbers, much less is known about how sperm quality contributes towards competitive fertilization success. Here, we determine whether variation in sperm quality influences competitive fertilization success in the green swordtail Xiphophorus helleri, a highly promiscuous livebearing fish. We use artificial insemination as a method of controlled sperm delivery and show that sperm swimming velocity is the primary determinant of fertilization success when ejaculates from two males compete to fertilize a female's eggs. By contrast, we found no evidence that sperm length had any effect on siring success. We also found no evidence that pre- and postcopulatory sexual traits were phenotypically integrated in this species, suggesting that the previous observation that reproductive skew favours males with high mating rates is unlikely to be due to any direct association between sperm quality and male sexual ornamentation.
Editor: United States: Public Library of Science
Idioma: Inglês

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Sperm swimming velocity predicts competitive fertilization success in the green swordtail Xiphophorus helleri

Gasparini, Clelia ; Simmons, Leigh W ; Beveridge, Maxine ; Evans, Jonathan P Halsey, Lewis George

United States: Public Library of Science

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