ABSTRACT
Vision is one of the principal senses of primates. It plays such a dominant role that the morphology of the visual apparatus is one criterion for distinguishing primates from other mammalian forms. Classical tests of color vision include sensitivity to light of different wavelengths, ability to distinguish differences between two similar wavelengths, and ability to distinguish a faintly colored light from an achromatic, white light. In absorption spectrophotometry, spectra can be plotted on a logarithmic scale and slid vertically for comparison, as is done in the bottom panel. The distinctive characteristics of the reflectance spectra encouraged to compare plant specimens of similar colors to determine whether their reflectance spectra could be categorized in some parsimonious way. The size of the fruit influences both the probability of seed dispersal and the fruit's spectral appearance. Other things being equal, large objects appear more saturated in color than small ones and hence will be more conspicuous.
