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Aquino R.,National Major San Marcos University | Zarate R.,Institute Investigaciones Of La Amazonia Peruana | Lopez L.,Equipo Primatologico de Loreto | Garcia G.,Equipo Primatologico de Loreto | Charpentier E.,Equipo Primatologico de Loreto
Primate Conservation | Year: 2015

We report on the current status and threats to Lagothrix flavicauda and other primates that inhabit montane forest of the Región Huánuco; an area that has been little explored with regard to its primate fauna and other mammals. During 618 km of transect walks in June-July 2014 and September-October 2014, we encountered 47 groups of five primate species, the most common being Alouatta seniculus (15 groups) and Lagothrix flavicauda (13 groups). We also observed four groups of Aotus sp. in the Miraflores census site. Lagothrix flavicauda was seen only in the microbasin of the Río Chontayacu, and Ateles chamek in the upper Río Huallaga. The primates were living in patches of primary and remnant forest surrounded by farmland and pasture except in Chontayacu, where the forest is still dense and extensive. Of the three species with complete counts, group sizes were largest for L. flavicauda (mean 13.6 ±7.8, n = 5) and smallest for A. seniculus (mean 5 ±3.5, n = 11). Population densities were highest for L. flavicauda (20.8 ind./km2) and lowest for Sapajus macrocephalus (2.7 ind./km2). Deforestation for agriculture and cattle ranching and hunting are the major threats to the survival of these primates. Sapajus macrocephalus and Cebus yuracus were the most affected by these threats, particularly in the Río Chinchao microbasin,.

Charpentier E.J.,Equipo Primatologico de Loreto | Garcia G.,Equipo Primatologico de Loreto | Aquino R.,National Major San Marcos University
Revista Peruana de Biologia | Year: 2015

In this report, we provide information on food plants of the equatorial saki (Pithecia aequatorialis) and its competitors in highland forest of the micro-watershed of the Itaya River, Peruvian Amazonia. From May to November 2009 and from January to April 2010 we followed silently two family groups with the purpose to identify plants whose fruits are part of their diet. During the contacts we had 90 food events in 48 plant species grouped in 24 families. Of these, 36 live in low hill forest and the rest in high terrace forest. The highest diversity of food plants is grouped into seven families that together accounted for 60.4%, among them Moraceae (8 species), Fabaceae (6 species) and Annonaceae (4 species) families. The fruits were mostly eaten in ripe state, being the mesocarp the most appreciated (40%). Among mammals, seven of the competitors were primates, with the main competitor being the red-mantled saddle-back tamarin (Saguinus lagonotus) and among birds the White-throated toucan (Ramphastos tucanus). Finally, the fruits of Pseudolmedia laevigata (Moraceae) were the most preferred by competitors (7 species of mammals and 2 of birds). © Los Autores.

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