Home range, intergroup transfers, and reproductive status of common marmosetsCallithrix jacchus in a forest fragment in North-Eastern Brazil

Abstract

We report the changes in wild common marmoset groups in a forest fragment in a urban area, in North-eastern Brazil. The groups were variable in size, from 5 to 15 animals, and a high rate of turnover of individuals per capture was found. More than one simultaneously captured female showed signs of either previous conception, or of sexual activity, and more than one was also pregnant. Home range size was larger compared with some previous studies, possibly as a consequency of the area being affected by human activities. This larger home range was maintained constant throughout the years of study.