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Geographic distribution and possible taxonomic distinction of Callicebus torquatus populations (Pitheciidae: Primates) in Peruvian Amazonia

2008; Wiley; Volume: 70; Issue: 12 Linguagem: Inglês

10.1002/ajp.20607

1098-2345

Rolando Aquino, Wagner Terrones, Fanny M. Cornejo, Eckhard W. Heymann,

Wildlife Ecology and Conservation

Abstract Population densities of yellow‐handed titi monkey ( Callicebus torquatus ) were estimated using transect census methods. Densities were 2.8 individuals/km 2 in the upper Rio Itaya basin and 2.5 individuals/km 2 in the lower Rio Algodón basin. Group size varied from two to five individuals, with an average of 2.9 individuals per group at the Rio Itaya. Groups were generally composed of two adults, probably the reproductive pair, with progeny from one to three previous birth seasons. Although the Rio Itaya population is phenotypically identical to populations from the rivers Nanay and Tigre, it differs from population on the rivers Napo and Putumayo. This suggests the existence of two disjunct populations of C. torquatus in Peruvian Amazonia whose taxonomic status warrants further examination. Am. J. Primatol. 70:1181–1186, 2008. © 2008 Wiley‐Liss, Inc.