Abstract
White-browed titi monkeys (Callicebus discolor) have one of the largest distribution ranges of all titi monkey species, occurring from central Peru to southern Colombia. During a long-term study on the distribution of titi monkeys and other primates in Peru, we conducted extensive surveys in the San Martin Department of northeastern Peru. We encountered Callicebus discolor at the left bank of the Huallaga River, where the species most probably lives in sympatry with endemic San Martin titi monkeys (Callicebus oenanthe). Our study reveals an important extension of its formerly known distribution range. Massive deforestation activities in the region make studies on the habitat preferences of both species difficult, as most titi monkeys are confined to the remaining small remnants of the original forest. Urgent conservation measures are necessary to preserve the last lowland forests of San Martin.
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Acknowledgments
This study is part of a long-term project for the conservation of Callicebus oenanthe, coordinated by the Peruvian NGO Proyecto Mono Tocón and initiated by Le Conservatoire pour la Protection des Primates of the primate park La Vallee des Singes of Romagne, France. We thank Dario Lorente Hollingworth, José Tito Villacis del Castillo, César Manuel Paredes Arévalo, Carlos Enrique Zabarburú Chicana, Julio Rengifo Chávez, Paulino Rafael Altamarino, and Antonio J. Bóveda-Penalba for companionship during the study. We thank Eckhard Heymann, Rob Wallace, and an anonymous reviewer for their comments on the manuscript. We also thank Cécile Callou and Jacques Cuisin for allowing us to study the collection of the Museum Nationale d’Histoire Naturelle de Paris, and René Dekker and Hein van Grouw for access to the collection of Naturalis in Leiden. We also thank the personnel of the Naturalis Library. Financial support for the study was provided by La Vallée des Singes, the Friends of Blackpool Zoo, Primate Conservation Inc., Apenheul Primate Park, Twycross Zoo, the Zoological Society of London, Eskilstuna Zoo, the Shaldon Wildlife Trust, Zodiac Zoos, and Bellewaerde Park. We thank DGFFS for authorization (Authorization 255-2009-AG-DGFFS-DGEFFS) to conduct this study. Our work would not have been possible without the help and hospitality of the Peruvian people, who were always friendly and happy to respond to our questions.
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Vermeer, J., Tello-Alvarado, J.C., Moreno-Moreno, S. et al. Extension of the Geographical Range of White-browed Titi Monkeys (Callicebus discolor) and Evidence for Sympatry with San Martin Titi Monkeys (Callicebus oenanthe). Int J Primatol 32, 924–930 (2011). https://doi.org/10.1007/s10764-011-9511-1
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DOI: https://doi.org/10.1007/s10764-011-9511-1