Polymorphism of visual pigments in a callitrichid monkey.

Callitrichid Monkey Branch Preference

Mutagenesis and reconstitution of middle-to-long-wave-sensitive visual pigments of New World monkeys for testing the tuning effect of residues at sites 229 and 233

The colour vision polymorphism of New World monkeys results from allelic variations of the middle-to-long-wave-sensitive (M/LWS) visual pigments. On the basis of sequence comparison, spectral differences among the alleles have been ascribed to amino acid residues at sites 180, 229, 233, 277, and 285. While the significant spectral effects have been demonstrated for sites 180, 277, and 285 by si...

Color-vision polymorphism in wild capuchins (Cebus capucinus) and spider monkeys (Ateles geoffroyi) in Costa Rica.

New World monkeys are unique in exhibiting a color-vision polymorphism due to an allelic variation of the red-green visual pigment gene. This makes these monkeys excellent subjects for studying the adaptive evolution of the visual system from both molecular and ecological viewpoints. However, the allele frequencies of the pigments within a natural population have not been well investigated. As ...

Sleep quantitation in common marmoset, cotton top tamarin and squirrel monkey by non-invasive actigraphy.

Sleep quantitation data on the Neotropical primate species, apart from the squirrel monkey, are still sparse. As such, we have quantitated sleep in the common marmosets (Callithrix jacchus), cotton top tamarins (Saguinus oedipus) and squirrel monkeys (Saimiri sciureus) reared in one primate facility simultaneously, by non-invasive actigraphy. The range in total sleep time/24h measured for male ...

Molecular evolution of trichromacy in primates

Although trichromacy in Old and New World primates is based on three visual pigments with spectral peaks in the violet (SW, shortwave), green (MW, middlewave) and yellow-green (LW, longwave) regions of the spectrum, the underlying genetic mechanisms differ. The SW pigment is encoded in both cases by an autosomal gene and, in Old World primates, the MW and LW pigments by separate genes on the X ...