FEMALE PREFERENCE PREDATES THE EVOLUTION OF THE SWORD IN SWORDTAIL FISH
FEMALE PREFERENCE PREDATES THE EVOLUTION OF THE SWORD IN SWORDTAIL FISH
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DOI：
10.1126/science.250.4982.808
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发表时间：
1990-11-09
期刊：
影响因子：
56.9
通讯作者：
BASOLO, AL
中科院分区：
文献类型：
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作者：
BASOLO, AL
直到最近，对女性偏好和男性特征进化的研究一直集中在遗传共同进化机制上。另一种机制假定，偏好的结果，从一个预先建立的偏见，在女性的信息处理系统所产生的来源独立的性选择。然后出现了被这种预先存在的偏好所选择的男性。剑尾鱼属由无剑的扁尾鱼和剑尾鱼组成。无剑是原始状态。在本研究中，雌性平口甲、X.尽管有证据表明，扁尾鱼和剑尾鱼的共同祖先是无剑的，但发现斑尾鱼更喜欢有人造剑的同种雄性而不是没有剑的雄性。这些结果表明，在剑尾鱼分支中剑的进化是一个选择的结果，产生于预先存在的偏见。
The study of female preferences and the evolution of male traits has until recently centered on genetic coevolutionary mechanisms. An alternative mechanism posits that a preference results from a preestablished bias in the female information-processing system arising from sources independent of sexual selection. Male taits then arise that are selected by this preexisting preference. The genus Xiphophorus consists of swordless platyfish and swordtails. Swordlessness is the primitive state. In this study, female platyfish, X. maculatus, were found to prefer conspecific males with artificial swords over those without swords, despite evidence that the common ancestor of platyfish and swordtails was swordless. These results suggest that the evolution of the sword in the swordtail clade was a consequence of selection arising from a preexisting bias.