The coastline and the western slopes of the Andes are main sites of Peruvian endemic mammals. Along the central coast occurs the only endemic rat from Lima, Zuniga’s dark rice rat, Melanomys zunigae (Sanborn, 1949). It was collected by Enrique Zuñiga in 1942 at Lomas de Atocongo and Cerro San Jerónimo. Since then, sporadic searches have been conducted, not necessarily targeted at finding it, but without records. Our study was aimed at finding evidence of its presence in the Loma formations around the city of Lima. Our methods were non-exhaustive trappings and the collection of burrowing owl (Athene cunicularia) pellets. Unfortunately no evidence of the presence of M. zunigae was found. However, we found evidence that the impact of Lima´s urban sprawl would be affecting small mammal assemblages at the Lomas. Several factors could have determined M. zunigae´s disappearance: habitat d...

En la costa y vertiente occidental ocurren los principales endemismos de mamíferos peruanos. Así mismo, a lo largo de la costa central, sobresale el único mamífero endémico del departamento de Lima, el ratón arrozalero de Zúñiga, Melanomys zunigae (Sanborn, 1949), registrado en las lomas de Atocongo y el cerro San Jerónimo por Enrique Zúñiga en 1942. Desde entonces se han realizado esporádicas evaluaciones, no necesariamente dirigidas a su búsqueda, aunque sin ningún registro. Nuestro estudio tuvo como objetivo la búsqueda de evidencias de la presencia de M. zunigae en las lomas de Lima, basados en un trampeo no exhaustivo y posteriormente en un análisis de regurgitos de la lechuza de los arenales (Athene cunicularia). Desafortunadamente no registramos ningún individuo de M. zunigae; sin embargo, encontramos evidencias que el impacto de la expansión urbana estaría afec...

The purpose of the present study is to establish the prevalence of intestinal parasites in a protectedpopulation of Ateles belzebuth chamek. Fecal samples were collected from 34 individuals in three social groups from one population at the Cocha Cashu Biological Station in Manu National Park, Peru. The samples were fixed in formalin (10%, 60 ºC) and analyzed by the Direct method and the Ritchie test for helminths. For protozoans, the samples were preserved in polyvinyl alcohol fixative (PVA) and were smeared and then stained with Tricrómica de Gomori. Laboratory analysis revealed that 76,4% (26/34) sampled individuals had parasites. Results included the identification of larvae or eggs of Strongyloides, Trichuris, Trypanoxyuris, strongyloid type, and one trematode of the Dicrocoeliidae, but not one species of protozoan.