Queensland Brain Institute, University of Queensland, Brisbane, Australia.
Biol Lett. 2010 Aug 23;6(4):537-9. doi: 10.1098/rsbl.2009.1010. Epub 2010 Feb 3.
Double cones (DCs) are the most common cone types in fish, reptiles and birds. It has been suggested that DCs are used for achromatic tasks such as luminance, motion and polarization vision. Here we show that a reef fish Rhinecanthus aculeatus can discriminate colours on the basis of the difference between the signals of individual members of DCs. This is the first direct evidence that individual members of DCs are used in colour vision as independent spectral channels.
双圆锥细胞（DCs）是鱼类、爬行动物和鸟类中最常见的视锥细胞类型。有人提出，DCs 用于非彩色任务，如亮度、运动和偏振视觉。在这里，我们表明，一种珊瑚礁鱼 Rhinecanthus aculeatus 可以根据 DC 中各个成员的信号差异来区分颜色。这是第一个直接证据表明，DC 中的各个成员被用作独立的光谱通道用于颜色视觉。
