Abstract
A five and a half month field study on the common marmosetCallithrix jacchus jacchus, was carried out during the dry season at Tapacura near Recife, Brazil. Twelve groups were counted and group sizes ranged between 3 and 13 animals. The age/sex class composition of three groups was determined by observation of one group and by trapping two others. Five groups were counted over a period of five months and one group over four months, during which two confirmed cases of immigration into groups were observed. The evidence for birth seasonality is considered. Data are presented to support the hypothesis that there is only one breeding female per group, although a group containing two mature females was observed. The observations are compared with those obtained for other Callitrichid species.
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Hubrecht, R.C. Field observations on group size and composition of the common marmoset (Callithrix jacchus jacchus), at Tapacura, Brazil. Primates 25, 13–21 (1984). https://doi.org/10.1007/BF02382291
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DOI: https://doi.org/10.1007/BF02382291