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International Journal of Ecology
Volume 2015 (2015), Article ID 685816, 13 pages
http://dx.doi.org/10.1155/2015/685816
Research Article

Home Range, Diet, and Activity Patterns of Common Marmosets (Callithrix jacchus) in Very Small and Isolated Fragments of the Atlantic Forest of Northeastern Brazil

1Programa de Pós-graduação em Biologia Animal (PPGBA), Departamento de Zoologia, Universidade Federal de Pernambuco (UFPE), Rua Prof. Moraes Rego 1235, Cidade Universitária, 50.740-620 Recife, PE, Brazil
2Instituto Nacional de Pesquisas da Amazônia (INPA), Núcleo de Pesquisas de Roraima (NPRR), Rua Coronel Pinto 315, Centro, 69.301-150 Boa Vista, RR, Brazil

Received 28 April 2015; Revised 7 July 2015; Accepted 22 July 2015

Academic Editor: Daniel I. Rubenstein

Copyright © 2015 Herbert Leonardo Nascimento Pinheiro and Antonio Rossano Mendes Pontes. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We evaluate the impact of very small and isolated forest fragments on the common marmosets home range, diet, and activity patterns, in the northeastern Atlantic Forest of Brazil. Three groups were studied in three forest fragments, from January to October 2010, totaling 360 hours of observations and 1,080 field-hours. Systematic observations were recorded using Instantaneous Scan Sampling, and a checklist of the items exploited was built through ad libitum observations. We recorded location of the groups and calculated home range. We recorded 11,639 scans and 236 ad libitum feeding records. 83.4% () of food items were plant species, the only animal protein was from insects (; 16.6%), and the diet was based almost exclusively on gums. Mean home range was 5.5 ha, mean daily path length was 1,167 meters, and no differences were detected between seasons. Resting dominated their activity budget and varied between seasons. Common marmosets survived in this environment through a remarkable increase in their exploitation of tree gums (up to 98% of their feeding bouts) to compensate for the lack of food, in home ranges slightly larger than in the literature. Thus, they travelled and foraged less than expected and rested more since food was easily obtained.