Behavioral evidence of color vision deficiency in a protanomalia chimpanzee (Pan troglodytes).
Although color vision deficiency is very rare among Old World monkeys and apes, one male chimpanzee (Lucky) was identified as protanomalous by genetic and physiological analyses. This study assessed behavioral phenotypes of Lucky and four chimpanzees with normal color vision by discrimination task using the modified Ishihara pseudo-isochromatic plates. Lucky could not discriminate the stimuli that the other chimpanzees could. This is the first behavioral evidence of color vision deficiency in chimpanzees.
Saito
Atsuko
A
Department of Cognitive and Behavioral Science, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Tokyo 153-8902, Japan.
Mikami
Akichika
A
Hasegawa
Toshikazu
T
Koida
Kowa
K
Terao
Kenichi
K
Koike
Satoshi
S
Onishi
Akishi
A
Takenaka
Osamu
O
Teramoto
Migaku
M
Mori
Yuusuke
Y
D000818:Animals; D003117:Color Vision Defects / Q000503:physiopathology*; D004192:Discrimination, Psychological / Q000502:physiology*; D008297:Male; D002679:Pan troglodytes / Q000502:physiology*; D014787:Vision Tests / Q000662:veterinary*