Blakeslee B, Jacobs G H
Brain Behav Evol. 1985;26(3-4):154-66. doi: 10.1159/000118772.
Behavioral discrimination tests were used to examine spectral sensitivity and color vision in a pair of ring-tailed lemurs (Lemur catta). Sensitivity tests revealed the presence of a Purkinje shift and a photopic visual system. As measured at increment-threshold, the photopic spectral sensitivity function for the lemur has multiple peaks (at ca. 440-460, 540, and 620 nm). In color vision tests lemurs behave trichromatically in that (a) they show no evidence for a neutral point in the spectral range of 470-510 nm, and (b) they set a unique Rayleigh match (540 nm + 645 nm = 570 nm). Tests of wavelength and colorimetric purity discrimination reveal that although this prosimian has color vision, it is not an acute capacity--thresholds for these color discriminations were consistently much higher for lemurs than for normal human trichromats tested in the same situation.
行为辨别测试被用于检测一对环尾狐猴（Lemur catta）的光谱敏感性和色觉。敏感性测试揭示了浦肯野氏位移和明视觉系统的存在。以增量阈值测量时，狐猴的明视觉光谱敏感性函数有多个峰值（约在440 - 460、540和620纳米处）。在色觉测试中，狐猴表现出三色视觉，即：（a）在470 - 510纳米的光谱范围内，它们没有表现出中性点的迹象；（b）它们设定了一个独特的瑞利匹配（540纳米 + 645纳米 = 570纳米）。波长和色度纯度辨别测试表明，尽管这种原猴类有色觉，但它并非敏锐的能力——在相同情况下测试时，狐猴进行这些颜色辨别的阈值始终比正常人类三色视者高得多。
