THE EVOLUTION OF MATE PREFERENCES FOR MULTIPLE SEXUAL ORNAMENTS
THE EVOLUTION OF MATE PREFERENCES FOR MULTIPLE SEXUAL ORNAMENTS
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DOI：
10.2307/2410492
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发表时间：
1994-06-01
期刊：
影响因子：
3.3
通讯作者：
POMIANKOWSKI, A
中科院分区：
文献类型：
--
作者：
IWASA, Y;POMIANKOWSKI, A
许多物种的雄性在求偶时会使用多种性装饰品。我们调查的演变女性的性偏好的一个以上的单一的男性特征的障碍过程。不利过程假设装饰是男性品质的指标，女性从她的后代继承“好基因”的配偶选择中受益，这增加了生存机会。一个新的障碍模型的开发，允许平衡的选择压力，独立的遗传参数。如果女性在评估潜在配偶时使用额外的男性特征，不会大大增加选择的总体成本，那么就会出现多重性偏好。然而，只有一个单一的偏好是进化稳定的，如果额外的男性特征的评估大大增加了选择的总成本（超过预期的成本，每个偏好独立组合）。任何单一的偏好都可以演化，其结果由初始条件决定。一种偏好的进化有效地阻碍了其他偏好的进化，即使是那些更能反映男性素质的特征。比较与性选择造成的费舍尔的失控过程中，男性的特点是纯粹的吸引力的字符。这表明，对多个费舍尔特征的性偏好可能会随着对单一障碍特征的偏好而演变，这表明男性的质量。这是这两种性选择原因的进化结果的一般差异。
Males of many species use multiple sexual ornaments in their courtship display. We investigate the evolution of female sexual preferences for more than a single male trait by the handicap process. The handicap process assumes that ornaments are indicators of male quality, and a female benefits from mate choice by her offspring inheriting ''good genes'' that increase survival chances. A new handicap model is developed that allows equilibria to be given in terms of selection pressures, independent of genetic parameters. Multiple sexual preferences evolve if the overall cost of choice is not greatly increased by a female using additional male traits in her assessment of potential mates. However, only a single preference is evolutionarily stable if assessment of additional male traits greatly increases the overall cost of choice (more than expected by combining the cost of each preference independently). Any single preference can evolve, the outcome being determined by initial conditions. The evolution of one preference effectively blocks the evolution of others, even for traits that are better indicators of male quality. Comparison is made with sexual selection caused by Fisher's runaway process in which male traits are purely attractive characters. This shows that sexual preferences for multiple Fisher traits are likely to evolve alongside preference for a single handicap trait that indicates male quality. This is a general difference in the evolutionary outcome of these two causes of sexual selection.