Marchetti K
Section of Evolution and Ecology, University of California at Davis
Anim Behav. 1998 Feb;55(2):361-76. doi: 10.1006/anbe.1997.0586.
I examined how male competition and female choice influence the evolution of multiple male traits in the yellow-browed leaf warbler, Phylloscopus inornatus, by investigating the roles of colour patches, territory size, body weight and song rate in sexual selection. Comparison of 3 years of observational studies and 3 years of experimental studies, in which the colour patches on the wings of males were experimentally altered, suggest several mechanisms that may explain the evolution of multiple characters in males. First, females based their choice of mates on several male characters, not a single character. Second, the male characters preferred by females were different in observational and experimental studies. Females apparently preferred high-quality males as mates, and were able to vary the characters used in mate choice to distinguish these individuals under both experimental and observational conditions. Third, the characters important in male competition differed from those that formed the basis of female choice: the manipulation of colour patch size directly affected male territory size but was not associated with female choice. These results may provide an explanation for the diversity of sexual ornaments shown by males of many species.Copyright 1998 The Association for the Study of Animal Behaviour.
我通过研究色斑、领地大小、体重和鸣叫速率在性选择中的作用，探讨了雄性竞争和雌性选择如何影响黄眉柳莺（Phylloscopus inornatus）多种雄性特征的进化。对3年的观察研究和3年的实验研究进行比较，在实验研究中雄性翅膀上的色斑被人为改变，结果表明了几种可能解释雄性多种特征进化的机制。第一，雌性选择配偶基于多个雄性特征，而非单一特征。第二，在观察研究和实验研究中，雌性偏好的雄性特征有所不同。雌性显然偏好高质量的雄性作为配偶，并且在实验和观察条件下都能够改变用于配偶选择的特征以区分这些个体。第三，在雄性竞争中重要的特征与构成雌性选择基础的特征不同：色斑大小的改变直接影响雄性领地大小，但与雌性选择无关。这些结果可能为许多物种雄性所表现出的性饰多样化提供一种解释。版权所有1998动物行为研究协会。
