Adult male-immature interactions in non-human primates range from aggressive displays – their extreme expression being infanticide (Bartlett et al., 1993) – agonistic buffering (Taub, 1980), tolerance or indifference (Baldwin & Baldwin, 1973) to affiliative and caretaking (Riedman, 1982; Buchan et al., 2003). In some monogamous species such as tamarins and marmosets (reviewed in Riedman, 1982),...

Here we present the results of a population survey of the black-faced lion tamarin, Leontopithecus caissara, on Superagüi Island, and we extrapolate this estimation to the entire population. We used the linear transect method for surveys of the area from November 2000 to January 2002. When lion tamarins were seen in transects, we noted the perpendicular distance from the path and the number of ...

The conservation status of A. palliata, commonly referred to as black mantled howler monkey, is vulnerable in Colombia because of its decline in population. The distributional limit in the northeast of the country is not well defined and the dry forests of the north of the country are being destroyed at alarming rates. In the municipality of El Guamo (Bolívar) less than 20% of the landscape is ...