Artificial Selection of Spectral Sensitivity and Its Effects in Poecilia reticulata

9317391 Endler第二性征在动物中很常见，而雄性特征有时发展得如此强烈，以至于表现出不适应。许多性选择的理论模型试图解释通过雌性选择而产生的显着性展示特征的进化。大多数模型的一个共同属性是，女性的偏好应该决定男性特征的进化方向。然而，大多数研究只关注雌性选择雄性的单代效应。恩德勒博士将研究女性偏好变化的长期影响。什么因素导致性选择特征向特定方向进化？一种可能的进化偏差是感官系统对特征的感知；有些特征比其他特征更容易被感知，并且考虑到感觉系统对信号的某些方面比其他方面更敏感，因此对信号的某些方面的识别比其他方面更容易。Endler博士将通过对雌性偏好的广泛人工选择及其对雌性雌性特征的二次影响来研究感官偏差的影响。这些问题不仅从性选择的角度来看是有趣和重要的，而且对物种的起源和维持也有重要的意义，因为性选择的特征经常用于物种的识别和隔离

9317391 Endler Secondary sexual traits are common in animals, and male traits are sometimes so strongly developed that they appear maladaptive. Numerous theoretical models of sexual selection attempt to account for the evolution of conspicuous sexual display traits through female choice. One property common to most models is that female preferences should determine the direction of evolution of male traits. However, most studies look only at the single-generation effects of female choice of males. Dr. Endler will examine the long-term effects of changes in female preferences. What factors cause sexually selected traits to evolve in particular directions?%%% One possible evolutionary bias is in the perception of traits by the sensory system; some traits are more easily perceived than others, and given that sensory systems are more sensitive to some aspects of signal than others, discrimination is easier for some aspects of signal than others. Dr Endler will examine the effects of sensory biases by means of an extensive artificial selection of female preferences and its secondary effects on male traits in Poecilia reticulata. These questions are not only interesting and important from the viewpoint of sexual selection, but also have important implications for the origin and maintenance of species because sexually selected traits are often used in species recognition and isolation.***