Visual sensitivity: significant within-species variations in a nonhuman primate.
Among squirrel monkeys (Saimiri sciureus) there are significant sex-related differences in visual sensitivity. As measured behaviorally in an increment-thershold task, a sample of males was found to be substantially less sensitive to long-wavelength (640-nanometer) light than a group of females tested in the same way, although the two groups showed no significant differences in sensitivity to a middle-wavelength (540-nanometer) light. The two group also differed on a test designed to measure the effects of chromatic adaptation.
D000818:Animals; D003118:Color Perception / Q000502:physiology*; D003117:Color Vision Defects / Q000662:veterinary; D003623:Dark Adaptation; D005260:Female; D000882:Haplorhini / Q000502:physiology*; D008297:Male; D008992:Monkey Diseases / Q000503:physiopathology; D012453:Saimiri / Q000502:physiology*; D012737:Sex Factors