Object Permanence in Common Marmosets (Callithrix jacchus)
A series of 9 search tasks corresponding to the Piagetian Stages 3-6 of object permanence were administered to 11 common marmosets (Callithrix jacchus). Success rates varied strongly among tasks and marmosets, but the performances of most subjects were above chance level on the majority of tasks of visible and invisible displacements. Although up to 24 […]
Paternal care in New World Primates
Extensive parental care is well developed in several genera of New World primates (genera Callicebus, Aotus, Callimico, Calltthrix, Cebuella, Leontopithecus, Saguinus) including most of the indirect and direct paternal care behaviors described by Kleiman and Malcolm (1981). Paternal care is correlated with a monogamous (and perhaps polyandrous) mating system and a small group size. Additionally, […]