Neitz J, Jacobs G H
Department of Psychology, University of California, Santa Barbara 93106.
Vis Neurosci. 1989;2(2):97-100. doi: 10.1017/s0952523800011949.
Ungulates have been classified as having arrhythmic eyes in the sense that they contain features appropriate both to diurnal and nocturnal life. The former is typically associated with multiple classes of cones and a color-vision capacity. To see if an arrhythmic animal has these features, the number of cone classes was determined and the spectra of these cones were measured in a common ungulate, the domestic pig (Sus scrofa). Examination with electroretinogram (ERG) flicker photometry revealed the presence of two classes of cones in the pig's eye having average maximum sensitivity (lambda max) at 439 nm and 556 nm, respectively. This ungulate thus has the requisite retinal basis for dichromatic color vision.
有蹄类动物被归类为具有无节律性眼睛，因为它们具有适合昼夜活动的特征。前者通常与多类视锥细胞和色觉能力相关。为了确定无节律性动物是否具有这些特征，我们测定了普通有蹄类动物家猪（Sus scrofa）的视锥细胞类别数量，并测量了这些视锥细胞的光谱。通过视网膜电图（ERG）闪烁光度法检查发现，猪眼中存在两类视锥细胞，其平均最大敏感度（λmax）分别在439纳米和556纳米处。因此，这种有蹄类动物具有二色性色觉所需的视网膜基础。
