Mimicry in coral reef fish: how accurate is this deception in terms of color and luminance?
Mimicry in coral reef fish: how accurate is this deception in terms of color and luminance?
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DOI：
10.1093/beheco/arp017
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发表时间：
2009-05-01
影响因子：
2.4
通讯作者：
Marshall, N. Justin
中科院分区：
文献类型：
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作者：
Cheney, Karen L.;Marshall, N. Justin
在选择性压力下，被认为具有攻击性和攻击性的模仿者会模仿他们的模型，而信号接收者则会在选择性压力下区分模仿者和模型。然而，信号接收器的感知能力，以区分模仿和模型很少被研究。在这里，我们研究了15个模型模仿珊瑚礁鱼对使用非主观的方法来判断模仿的准确性，在颜色和亮度。然后，我们研究了潜在的能力，鱼与各种视觉系统之间的区别模型和模仿的颜色，使用理论视觉模型。我们发现，从非主观的角度来看，大多数模仿者在颜色和亮度方面与模型非常相似。然而，鱼有潜在的三色（3个不同的锥光感受器）的视觉系统与紫外线敏感性有一个更好的能力来区分模型和模拟物相比，鱼与中档敏感性或二色（2锥光感受器）鱼。模型和模拟物反射的色块的光谱反射率随着深度的增加而变得更加相似，这表明信号接收器可能更有可能将模拟物与靠近表面的栖息地中的模型区分开来。亮度对比度随深度的变化不存在这种变化。因此，预测模仿者准确地模仿其模型的选择压力会根据信号接收器的视觉系统和光环境而变化。
Batesian and aggressive mimics are considered to be under selective pressure to resemble their models, whereas signal receivers are under selection to discriminate between mimics and models. However, the perceptual ability of signal receivers to discriminate between mimics and models is rarely studied. Here we examined 15 model-mimic coral reef fish pairs using nonsubjective methods to judge the accuracy of mimics in terms of color and luminance. We then investigated the potential ability of fish with various visual systems to discriminate between model and mimic colors using theoretical vision models. We found the majority of mimics closely resembled models in terms of color and luminance from a nonsubjective perspective. However, fish that have potentially trichromatic (3 distinct cone photoreceptors) visual systems with ultraviolet sensitivity had a much better capacity to discriminate between models and mimics compared with fish with midrange sensitivity or dichromatic (2 cone photoreceptors) fish. The spectral reflectance of color patches reflected by models and mimics became more similar with an increase in depth, indicating that signal receivers may be more likely to distinguish mimics from models in habitats located closer to the surface. There was no such change in luminance contrast with depth. The selection pressure on mimics to accurately resemble their model is therefore predicted to vary depending on the visual system of the signal receiver and the light environment.