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Within-species variations in visual capacity among squirrel monkeys (Saimiri sciureus): Sensitivity differences

Jacobs, Gerald H.·1983·Vision Research
DOI 10.1016/0042-6989(83)90112-8
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Abstract

Earlier observations suggested there might be significant within-species variations in visual sensitivity among squirrel monkeys (Saimiri sciureus). Reported here are the results from measurements of increment-threshold spectral sensitivity in 41 squirrel monkeys of Peruvian origin. As determined in a forced-choice discrimination task, no large variations were found among these animals in sensitivity to a 540 nm test light. However, there were large individual variations in sensitivity to a 640 nm light, the result being that, across this sample of monkeys, the differences in sensitivity to the 540 and 640 nm lights are bimodally distributed. This variation in sensitivity is gender related in that the more sensitive mode in this distribution is made up exclusively of female monkeys. The less sensitive animals include all of the males tested and a minority (7 out of 22) of the females examined. Additional experiments involving the measurement of sensitivity to monochromatic lights under conditions of dark and chromatic adaptation indicate that (a) the variation in sensitivity is not due to the variable presence of an intraretinal filter, and (b) the more sensitive squirrel monkeys have two differentially adaptable spectral mechanisms in the green to red portion of the spectrum, while the less sensitive monkeys do not.

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Research works printed but not linked: 14

  1. Ariga, 1978, Possible errors of identification of squirrel monkeys (Saimiri sciureus) from different South American points of export, J. Med. Primat., 7, 129, 10.1159/000459802 · DOI
  2. Baldwin, 1971, Suirrel monkeys (Saimiri) in natural habitats in Panama. Colombia, Brazil and Peru, Primates, 12, 45, 10.1007/BF01730381 · DOI
  3. Boynton, 1961, Two-color threshold as test of color vision, J. opt. Soc. Am., 51, 429, 10.1364/JOSA.51.000429 · DOI
  4. Boynton, 1965, Theory and experiments concerning the heterochromatic threshold-reduction factor (HTRF), J. opt. Soc. Am., 55, 1672, 10.1364/JOSA.55.001672 · DOI
  5. Giacomelli, 1971, Subpopulation of blood lymphocytes demonstrated by quantitative cytochemistry, J. Histochem. Cytochem., 19, 426, 10.1177/19.7.426 · DOI
  6. Hurvich, 1953, Spectral sensitivity of the fovea. I. Neutral adaptation, J. opt. Soc. Am., 43, 485, 10.1364/JOSA.43.000485 · DOI
  7. Jacobs, 1972, Increment-threshold spectral sensitivity in the squirrel monkey, J. comp. Physiol. Psychol., 79, 425, 10.1037/h0032838 · DOI
  8. Jacobs, 1974, Vision in squirrel monkeys: physiological and psychophysical evidence of sex-related differences, Physiologist, 17, 254
  9. Jacobs, 1977, Visual sensitivity: Significant withinspecies variations in a nonhuman primate, Science, 197, 499, 10.1126/science.406676 · DOI
  10. Jacobs, 1981, Colour vision in monkeys: Behavioural and microspectrophotometric measurements on the same individuals, Nature, 292, 541, 10.1038/292541a0 · DOI
  11. MacLean, 1964, Mirror display in the squirrel monkey (Saimiri sciureus), Science, 145, 950, 10.1126/science.146.3646.950 · DOI
  12. Moorhead P. S., Nowell P. C., Mellman W. J., Battips D. M. and Hungerford D. A. Chromosome preparation of leukocytes cultured from human peripheral blood.Expl Cell Res.20, 613–616. · DOI
  13. Roy, 1981, Subspecies differences in curiosity and general activity for developing squirrel monkeys, Devl Psychobiol., 14, 55, 10.1002/dev.420140107 · DOI
  14. Zegers, 1959, Photo-sensitization in relation to mean and standard deviation values, Psychol. Monogr., 73, 1, 10.1037/h0093747 · DOI

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Metadata

Authors
Jacobs, G. H.
Venue
Vision Research
Publisher
Elsevier BV
Published
1983-01
Volume
23
Issue
3
Pages
239-248
ISSN
0042-6989
DOI
10.1016/0042-6989(83)90112-8
Cited by
38
References
0
Language
en
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)

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CoChat. (2026). Citation check: Within-species variations in visual capacity among squirrel monkeys (Saimiri sciureus): Sensitivity differences. https://app.cochat.ai/papers/10.1016/0042-6989(83)90112-8
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Jacobs, G. H. (1983). Within-species variations in visual capacity among squirrel monkeys (Saimiri sciureus): Sensitivity differences. Vision Research. https://doi.org/10.1016/0042-6989(83)90112-8