Visual signalling by asymmetry: a review of perceptual processes.
Visual signalling by asymmetry: a review of perceptual processes.
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不对称的视觉信号：感知过程的回顾。
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
J. Swaddle
中科院分区：
文献类型：
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作者：
J. Swaddle
表现波动不对称的个体不对称水平可以作为表型（也许是基因型）质量的视觉信号，因为不对称通常与适合度参数呈负相关。有一些数据支持这一假设，但所采用的实验方案通常导致的不对称性远远大于自然界中观察到的不对称性。迄今为止，很少有人考虑动物准确区分小不对称（在野外观察到的大小）和完美对称的能力。这是评估不对称信号假说合理性的关键。在这里，我回顾了可能导致不对称歧视的感知过程，并讨论了一些可能影响不对称信号传导的生态相关因素。这些因素包括：信号的方向、特征元素离对称轴的距离、特征的复杂性、特征的对比度和颜色，以及信号发送者和接收者的行为。我还讨论了对称偏好的演变，并就研究人员应该关注的地方提出建议，以检验不对称信号理论的普遍性。在高度发育稳定的信号系统中，不对称的幅度可能太小，无法准确可靠地检测到，因此不对称信号不太可能在这些情况下进化。
Individual levels of asymmetry in traits that display fluctuating asymmetry could be used as visual signals of phenotypic (and perhaps genotypic) quality, as asymmetry can often be negatively related to fitness parameters. There are some data to support this hypothesis but the experimental protocols employed have commonly resulted in asymmetries far larger than those observed in nature. To date, there has been little consideration of the ability of animals to accurately discriminate small asymmetries (of the magnitude observed in the wild) from perfect symmetry. This is key to assessing the plausibility of the asymmetry-signalling hypothesis. Here, I review the perceptual processes that may lead to the discrimination of asymmetry and discuss a number of ecologically relevant factors that may influence asymmetry signalling. These include: signal orientation, distance of trait elements from the axis of symmetry, trait complexity, trait contrast and colour, and the behaviour of both signaller and receiver. I also discuss the evolution of symmetry preferences and make suggestions as to where researchers should focus attention to examine the generality of asymmetry-signalling theory. In highly developmentally stable signalling systems the magnitude of asymmetry may be too small to be detected accurately and reliably, hence asymmetry signalling is unlikely to have evolved in these situations.
影响因子：
4.6
作者：
Younger,BA
通讯作者：
Younger,BA