Chimpanzee (Pan troglodytes) gaze is conspicuous at ecologically-relevant distances
Santana, S. E., Alfaro, J. L. & Alfaro, M. E. Adaptive evolution of facial colour patterns in Neotropical primates. Proc. R. Soc. B Biol. Sci. 279, 2204–2211 (2012).
Google Scholar
Santana, S. E., Alfaro, J. L., Noonan, A. & Alfaro, M. E. Adaptive response to sociality and ecology drives the diversification of facial colour patterns in catarrhines. Nat. Commun. 4, 25 (2013).
Google Scholar
Kobayashi, H. & Kohshima, S. Unique morphology of the human eye and its adaptive meaning: Comparative studies on external morphology of the primate eye. J. Hum. Evol. 40, 419–435 (2001).CAS
PubMed
Google Scholar
Tomasello, M., Hare, B., Lehmann, H. & Call, J. Reliance on head versus eyes in the gaze following of great apes and human infants: The cooperative eye hypothesis. J. Hum. Evol. 52, 314–320 (2007).PubMed
Google Scholar
Farroni, T. et al. Newborns’ preference for face-relevant stimuli: Effects of contrast polarity. Proc. Natl. Acad. Sci. USA 102, 17245–17250 (2005).ADS
CAS
PubMed
PubMed Central
Google Scholar
Farroni, T., Massaccesi, S., Pividori, D. & Johnson, M. H. Gaze following in newborns. Infancy 5, 39–60 (2004).
Google Scholar
Itakura, S. & Tanaka, M. Use of experimenter-given cues during object-choice tasks by chimpanzees (Pan troglodytes), an orangutan (Pongo pygmaeus), and human infants (Homo sapiens). J. Comp. Psychol. 112, 119–126 (1998).CAS
PubMed
Google Scholar
Yorzinski, J. L., Thorstenson, C. A. & Nguyen, T. P. Sclera and iris color interact to influence gaze perception. Front. Psychol. 12, 1–11 (2021).
Google Scholar
Yorzinski, J. L., Harbourne, A. & Thompson, W. Sclera color in humans facilitates gaze perception during daytime and nighttime. PLoS One 16, 1–15 (2021).
Google Scholar
Yorzinski, J. L. & Miller, J. Sclera color enhances gaze perception in humans. PLoS One 15, 1–14 (2020).
Google Scholar
Tomasello, M., Call, J. & Hare, B. Five primate species follow the visual gaze of conspecifics. Anim. Behav. 55, 1063–1069 (1998).CAS
PubMed
Google Scholar
Kano, F. & Call, J. Cross-species variation in gaze following and conspecific preference among great apes, human infants and adults. Anim. Behav. 91, 137–150 (2014).
Google Scholar
Kano, F., Kawaguchi, Y. & Yeow, H. Experimental evidence for the gaze-signaling hypothesis: White sclera enhances the visibility of eye gaze direction in humans and chimpanzees. bioRxiv 2021.09.21.461201 (2021).Perea-García, J. O., Kret, M. E., Monteiro, A. & Hobaiter, C. Scleral pigmentation leads to conspicuous, not cryptic, eye morphology in chimpanzees. Proc. Natl. Acad. Sci. USA 116, 19248–19250 (2019).PubMed
PubMed Central
Google Scholar
Mearing, A. S. & Koops, K. Quantifying gaze conspicuousness: Are humans distinct from chimpanzees and bonobos ?. J. Hum. Evol. 157, 103043 (2021).PubMed
Google Scholar
Mearing, A. S., Burkart, J. M., Dunn, J., Street, S. E. & Koops, K. The evolutionary origins of primate scleral coloration. bioRxiv 40, 2021.07.25.453695 (2021).Mayhew, J. A. & Gómez, J. C. Gorillas with white sclera: A naturally occurring variation in a morphological trait linked to social cognitive functions. Am. J. Primatol. 77, 869–877 (2015).PubMed
Google Scholar
Caspar, K. R., Biggemann, M., Geissmann, T. & Begall, S. Ocular pigmentation in humans, great apes, and gibbons is not suggestive of communicative functions. Sci. Rep. 11, 1–14 (2021).
Google Scholar
Kano, F. et al. What is unique about the human eye? Comparative image analysis on the external eye morphology of human and nonhuman great apes. Evol. Hum. Behav. https://doi.org/10.1016/j.evolhumbehav.2021.12.004 (2021).
Google Scholar
Caves, E. M. & Johnsen, S. AcuityView: An r package for portraying the effects of visual acuity on scenes observed by an animal. Methods Ecol. Evol. 9, 793–797 (2018).
Google Scholar
Osorio, D. & Vorobyev, M. Photoreceptor spectral sensitivities in terrestrial animals: Adaptations for luminance and colour vision. Proc. R. Soc. B Biol. Sci. 272, 1745–1752 (2005).CAS
Google Scholar
Troscianko, J. & Stevens, M. Image calibration and analysis toolbox—a free software suite for objectively measuring reflectance, colour and pattern. Methods Ecol. Evol. 6, 1320–1331 (2015).PubMed
PubMed Central
Google Scholar
Stevens, M., Párraga, C. A., Cuthill, I. C., Partridge, J. C. & Troscianko, T. S. Using digital photography to study animal coloration. Biol. J. Linn. Soc. 90, 211–237 (2007).
Google Scholar
Whitham, W., Schapiro, S. J., Troscianko, J. & Yorzinski, J. L. The gaze of a social monkey is perceptible to conspecifics and predators but not prey. Proc. R. Soc. B Biol. Sci. 20, 10 (2002).
Google Scholar
Bethell, E. J., Vick, S. & Bard, K. A. Measurement of eye-gaze in chimpanzees (Pan troglodytes). Am. J. Primatol. 69, 562–575 (2007).PubMed
Google Scholar
Sreekar, R. & Quader, S. Influence of gaze and directness of approach on the escape responses of the Indian rock lizard, Psammophilus dorsalis (Gray, 1831). J. Biosci. 38, 829–833 (2013).CAS
PubMed
Google Scholar
Lee, S. et al. Direct look from a predator shortens the risk-assessment time by prey. PLoS One 8, 1–7 (2013).
Google Scholar
Carter, J., Lyons, N. J., Cole, H. L. & Goldsmith, A. R. Subtle cues of predation risk: Starlings respond to a predator’s direction of eye-gaze. Proc. R. Soc. B Biol. Sci. 275, 1709–1715 (2008).
Google Scholar
Newton-Fisher, N. E. Chimpanzee hunting. Behav. Handb. Paleoanthropol. https://doi.org/10.1007/978-3-540-33761-4_42. (2007).
Google Scholar
Caro, T. et al. The evolution of primate coloration revisited. Behav. Ecol. 32, 555–567 (2021).
Google Scholar
Kilkenny, C., Browne, W., Cuthill, I. C., Emerson, M. & Altman, D. G. Animal research: Reporting in vivo experiments: The ARRIVE guidelines. Br. J. Pharmacol. 160, 1577–1579 (2010).CAS
PubMed
PubMed Central
Google Scholar
Bergman, T. J. & Beehner, J. C. A simple method for measuring colour in wild animals: Validation and use on chest patch colour in geladas (Theropithecus gelada). Biol. J. Linn. Soc. 94, 231–240 (2008).
Google Scholar
Stevens, M., Stoddard, M. C. & Higham, J. P. Studying primate color: Towards visual system-dependent methods. Int. J. Primatol. 30, 893–917 (2009).
Google Scholar
van den Berg, C. P., Troscianko, J., Endler, J. A., Marshall, N. J. & Cheney, K. L. Quantitative Colour Pattern Analysis (QCPA): A comprehensive framework for the analysis of colour patterns in nature. Methods Ecol. Evol. 11, 316–332 (2020).
Google Scholar
Deeb, S. S., Jorgensen, A. L., Battisti, L., Iwasaki, L. & Motulsky, A. G. Sequence divergence of the red and green visual pigments in great apes and humans. Proc. Natl. Acad. Sci. USA 91, 7262–7266 (1994).ADS
CAS
PubMed
PubMed Central
Google Scholar
Matsuzawa, T. Form perception and visual acuity. Folia Primatol. Int. J. Primatol. 55, 24–32 (1990).CAS
Google Scholar
Jacobs, G. H., Deegan, J. F. & Moran, J. L. ERG measurements of the spectral sensitivity of common chimpanzee (Pan troglodytes). Vis. Res. 36, 2587–2594 (1996).CAS
PubMed
Google Scholar
Jacobs, G. H. & Deegan, J. F. Uniformity of colour vision in Old World monkeys. Proc. R. Soc. B Biol. Sci. 266, 2023–2028 (1999).CAS
Google Scholar
Kemp, A. D. & Christopher Kirk, E. Eye size and visual acuity influence vestibular anatomy in mammals. Anat. Rec. 297, 781–790 (2014).
Google Scholar
Osorio, D., Smith, A. C., Vorobyev, M. & Buchanan-Smith, H. M. Detection of fruit and the selection of primate visual pigments for color vision. Am. Nat. 164, 696–708 (2004).CAS
PubMed
Google Scholar
Vorobyev, M. & Osorio, D. Receptor noise as a determinant of colour threshoIds. Proc. R. Soc. B Biol. Sci. 265, 351–358 (1998).CAS
Google Scholar
Siddiqi, A., Cronin, T. W., Loew, E. R., Vorobyev, M. & Summers, K. Interspecific and intraspecific views of color signals in the strawberry poison frog Dendrobates pumilio. J. Exp. Biol. 207, 2471–2485 (2004).PubMed
Google Scholar More