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A Genetic Polymorphism in the Swordtail Xiphophorus nigrensis: Testing the Prediction of Equal Fitnesses
When a genetically determined polymorphism is selectively maintained in a population, the different morphs should have equal fitnesses at equilibrium. We empirically examined this prediction for theExpand
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Avoiding a compromise between sexual selection and species recognition: female swordtail fish assess multiple species-specific cues
Females increase their risk of mating with heterospecifics when they prefer the traits of conspecifics that overlap with traits found in heterospecifics. Xiphophorus pygmaeus females have a strongExpand
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A polymorphism in female preference for a polymorphic male trait in the swordtail fish Xiphophorus cortezi
Xiphophorus cortezi males are polymorphic for the pigment pattern vertical bars. In this study, we determined whether X. cortezi females are polymorphic in their preference for this trait byExpand
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The role of sexual selection in the loss of sexually selected traits in the swordtail fish Xiphophorus continens
Swordtail fish have been studied extensively in relation to several exaggerated male traits that have evolved due to sexual selection. However, one species of swordtail fish, Xiphophorus continens,Expand
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Larger swordtail females prefer asymmetrical males
Many organisms, including humans, find symmetry more attractive than asymmetry. Is this bias towards symmetry simply a by-product of their detection system? We examined female preference for symmetryExpand
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Mate choice for more melanin as a mechanism to maintain a functional oncogene
The mechanisms by which cancer evolves and persists in natural systems have been difficult to ascertain. In the Xiphophorus melanoma model, a functional oncogene (Xiphophorus melanoma receptor kinaseExpand
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Male-male competition and access to females in the swordtail Xiphophorus nigrensis
1982 Ed. Statistical Analysis Systems Institute Inc., Cary, North Carolina. SCHOENER, T. W., AND A. SCHOENER. 1978. Estimating and interpreting body-size growth in some Anolis lizards. CopeiaExpand
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Female preference variation has implications for the maintenance of an alternative mating strategy in a swordtail fish
Female preference variation over space and time could be an alternative to frequency-dependent selection as a mechanism maintaining alternative male reproductive strategies. In the swordtail fish,Expand
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Genetic variation and phylogeography of the swordtail fish Xiphophorus cortezi (Cyprinodontiformes, Poeciliidae).
Swordtail fish have been studied extensively in relation to diverse aspects of biology; however, little attention has been paid to the patterns of genetic variation within and among populations ofExpand
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Sexual Selection and Trichromatic Color Vision in Primates: Statistical Support for the Preexisting‐Bias Hypothesis
The evolution of trichromatic color vision in primates may improve foraging performance as well as intraspecific communication; however, the context in which color vision initially evolved isExpand
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