Lectin Histochemistry and Carcinoembryonic Antigen in Spontaneous Colonic Cancers of Cotton-top Tamarins (Saguinus oedipus)

Food-sharing in cotton-top tamarins (Saguinus oedipus).

Food-sharing behaviour was observed in 9 captive families of cotton-top tamarins (range 4-14 individuals per group), during meals of fresh fruit. Food was transferred to infants by their parents and older sibs in response to begging, and was also offered to them without prior solicitation. Older, mature, reproductively suppressed individuals shared more than young immature monkeys. Infants in l...

Spontaneous number discrimination of multi-format auditory stimuli in cotton-top tamarins (Saguinus oedipus).

Studies using operant training have demonstrated that laboratory animals can discriminate the number of objects or events based on either auditory or visual stimuli, as well as the integration of both auditory and visual modalities. To date, studies of spontaneous number discrimination in untrained animals have been restricted to the visual modality, leaving open the question of whether such ca...

Activity Profiles and Hormone Metabolites in a Captive Group of Eight Cotton - Top Tamarins , Saguinus oedipus

An Assessment of the Population of Cotton-Top Tamarins (Saguinus oedipus) and Their Habitat in Colombia

Numerous animals have declining populations due to habitat loss, illegal wildlife trade, and climate change. The cotton-top tamarin (Saguinus oedipus) is a Critically Endangered primate species, endemic to northwest Colombia, threatened by deforestation and illegal trade. In order to assess the current state of this species, we analyzed changes in the population of cotton-top tamarins and its h...

Cotton-top tamarins (Saguinus oedipus) fail to show mirror-guided self-exploration.

To investigate the problem of inter- and intraspecific differences on the mirror test, we conducted two experiments on cotton-top tamarins. Experiment 1 employed a technique similar to one used recently on chimpanzees, and provided no evidence of mirror-mediated touching of the marked area. In a control condition, involving colored dye applied to one arm, two subjects also failed to show self-d...