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Related Experiment Videos

Color vision in the spider monkey (Ateles)

B Blakeslee, G H Jacobs

    Folia Primatologica; International Journal of Primatology
    |January 1, 1982
    PubMed
    Summary

    Spider monkeys (Ateles) exhibit varied color vision, with one female showing normal trichromatic vision and one male displaying protanomalous trichromacy, similar to variations in other New World monkeys.

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    Photopigments and colour vision in New World monkeys from the family Atelidae.

    Proceedings. Biological sciences·2001

    Area of Science:

    • Primatology
    • Vision Science
    • Comparative Psychology

    Background:

    • Spider monkeys (Ateles) are New World monkeys with incompletely understood color vision.
    • Variations in color vision exist among primate species, impacting ecological interactions.

    Purpose of the Study:

    • To investigate spectral sensitivity and color vision types in spider monkeys.
    • To compare spider monkey color vision to human trichromacy and other primate variations.

    Main Methods:

    • Used a forced-choice discrimination paradigm to assess spectral sensitivity.
    • Conducted color vision tests including neutral point, anomaloscope, and wavelength discrimination.

    Main Results:

    • Both spider monkeys showed spectral sensitivity similar to human trichromats, with peak sensitivities around 440-460, 520-540, and 670-620 nm.
    • The female spider monkey possessed normal trichromatic color vision with acute wavelength discrimination.
    • The male spider monkey was identified as protanomalous trichromatic, requiring more red light in a red/green mixture.

    Conclusions:

    • Spider monkeys exhibit at least two qualitatively different types of color vision.
    • This variation in spider monkey color vision is analogous to variations found in other South American monkeys.
    • Findings contribute to understanding primate visual diversity and evolution.

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