Behavioral and genetic color vision evaluation of an albino male capuchin monkey (Sapajus apella)

Henriques, Leonardo Dutra; Oliveira, J C P; Bonci, Daniela Maria Oliveira; Leao, R C; Souza, Givago da Silva; Silveira, L. C. L; Galvão, Olavo de Faria; Goulart, Paulo Roney Kilpp; Ventura, Dora Fix

doi:10.1007/s00359-019-01342-4

Cited by 3 publications

(5 citation statements)

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“…The behavioural experiments were limited by the difficulty in attracting the Alouatta monkeys to engage and perform the tests. This was remarkably different from the behaviour of other Platyrrhini, such as Sapajus investigated previously by our group [20,21]. Some alternative training techniques and rewards such as grapes, nuts, 190 mg and 300 mg banana pellets were tested, until we reached the training protocol described in the Methods section.…”

Section: Methodsmentioning

confidence: 74%

“…and capuchin monkeys (Cebus sp. and Sapajus spp) [18][19][20], as well as an albino Sapajus apella subject [21].…”

Section: Introductionmentioning

confidence: 99%

“…and (D) a trichromatic female capuchin monkey (Sapajus sp.). The capuchin monkeys were evaluated in previous work from our group[21,25], were tested using the same apparatus for only one of the background chromaticities, and were included to allow comparison with the Alouatta phenotype. Black circles show the fitted ellipses for the group of chromatic vector thresholds tested at each background chromaticity.…”

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confidence: 99%

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Uniform trichromacy in Alouatta caraya and Alouatta seniculus: behavioural and genetic colour vision evaluation

et al. 2021

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Primate colour vision depends on a matrix of photoreceptors, a neuronal post receptoral structure and a combination of genes that culminate in different sensitivity through the visual spectrum. Along with a common cone opsin gene for short wavelengths (sws1), Neotropical primates (Platyrrhini) have only one cone opsin gene for medium-long wavelengths (mws/lws) per X chromosome while Paleotropical primates (Catarrhini), including humans, have two active genes. Therefore, while female platyrrhines may be trichromats, males are always dichromats. The genus Alouatta is inferred to be an exception to this rule, as electrophysiological, behavioural and molecular analyses indicated a potential for male trichromacy in this genus. However, it is very important to ascertain by a combination of genetic and behavioural analyses whether this potential translates in terms of colour discrimination capability. We evaluated two howler monkeys (Alouatta spp.), one male A. caraya and one female A. seniculus, using a combination of genetic analysis of the opsin gene sequences and a behavioral colour discrimination test not previously used in this genus. Both individuals completed the behavioural test with performances typical of trichromatic colour vision and the genetic analysis of the sws1, mws, and lws opsin genes revealed three different opsin sequences in both subjects. These results are consistent with uniform trichromacy in both male and female, with presumed spectral sensitivity peaks similar to Catarrhini, at ~ 430 nm, 532 nm, and 563 nm for S-, M- and L-cones, respectively.

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Section: Methodsmentioning

confidence: 74%

“…and capuchin monkeys (Cebus sp. and Sapajus spp) [18][19][20], as well as an albino Sapajus apella subject [21].…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Uniform trichromacy in Alouatta caraya and Alouatta seniculus: behavioural and genetic colour vision evaluation

et al. 2021

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“…In recent years, researchers have conducted studies to investigate the chromatic discrimination abilities of platyrrhine monkeys using a stimulus named pseudoisochromatic [ 20 , 21 ], which is formed by a set of non-overlapped individual elements arranged as a mosaic of circular patches. A subgroup of these elements shared the same color shaping a visual target over the remained elements that had different color compared to the target in region of the stimulus named background.…”

Section: Introductionmentioning

confidence: 99%

“…: [ 22 ]), capuchin monkeys ( Sapajus spp. : [ 20 , 21 ]), and howler monkeys ( Alouatta spp. : [ 23 ]) using mosaics which the target is an illusory square.…”

Section: Introductionmentioning

confidence: 99%

Investigation of preference for local and global processing of Capuchin-monkeys (Sapajus spp.) in shape discrimination of mosaic arrangements

Mendes,

Brino,

Goulart

et al. 2024

PLoS ONE

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Classical experiments using hierarchical stimuli to investigate the ability of capuchin monkeys to integrate visual information based on global or local clues reported findings suggesting a behavioral preference for local information of the image. Many experiments using mosaics have been conducted with capuchin monkeys to identify some of their perceptual phenotypes. As the identification of an image in a mosaic demands the integration of elements that share some visual features, we evaluated the discrimination of shapes presented in solid and mosaic stimuli in capuchin monkeys. Shape discrimination performance was tested in 2 male adult capuchin monkeys in an experimental chamber with a touchscreen video monitor, in three experiments: (i) evaluation of global and local processing using hierarchical stimuli; (ii) evaluation of target detection using simple discrimination procedures; (iii) evaluation of shape discrimination using simple discrimination and delayed matching-to-sample procedures. We observed that both monkeys had preferences for local processing when tested by hierarchical stimuli. Additionally, detection performance for solid and mosaic targets was highly significant, but for shape discrimination tasks we found significant performance when using solid figures, non-significant performance when using circle and square shapes in mosaic stimuli, and significant performance when using Letter X and Number 8 shapes in mosaic stimuli. Our results are suggestive that the monkeys respond to local contrast and partly to global contrast in mosaic stimuli.

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Chromatic discrimination in fixed saturation levels from tufted capuchin monkeys with different color vision genotypes

et al. 2023

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Behavioral and genetic color vision evaluation of an albino male capuchin monkey (Sapajus apella)

Cited by 3 publications

References 18 publications

Uniform trichromacy in Alouatta caraya and Alouatta seniculus: behavioural and genetic colour vision evaluation

Uniform trichromacy in Alouatta caraya and Alouatta seniculus: behavioural and genetic colour vision evaluation

Investigation of preference for local and global processing of Capuchin-monkeys (Sapajus spp.) in shape discrimination of mosaic arrangements

Chromatic discrimination in fixed saturation levels from tufted capuchin monkeys with different color vision genotypes

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