Browsing by Autor "Ayala, Guido"

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    Densidad de la ardilla roja amazónica (Familia Sciuridae, Sciurus spadiceus) en el valle del río Tuichi (Parque Nacional y Area Natural de Manejo Integrado Madidi, La Paz, Bolivia)
    (Ecología en Bolivia, 2003) Gómez, Humberto; Ayala, Guido; Wallace, Robert B.; Espinoza, Fortunato
    Durante una evaluación de diversidad y abundancia de mamíferos grandes y medianos en el área baja del río Tuichi, en el Parque Nacional y Área Natural de Manejo Integrado Madidi, recolectamos información suficiente para estimar la densidad de la ardilla roja amazonica (Sciurus spadiceus). La densidad promedio entre dos épocas de evaluación fue de 12.2 individuos/km². Aunque no existen otras estimaciones de densidad en el área protegida la zona evaluada presenta una mayor tasa de encuentro con relación a otros tres sitios evaluados. Encontramos una variación en la abundancia entre épocas que podría estar relacionada a la disponibilidad de recursos alimenticios disponibles entre las dos épocas evaluadas.
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    Small Felids Coexist in Mixed-Use Landscape in the Bolivian Amazon.
    (2024) Anderson, Courtney; Zuckerwise, Amelia; Wallace, Robert B; Ayala, Guido; Viscarra, Maria; Schmitz, Oswald J
    In the face of global species loss, it is paramount to understand the effects of human activity on vulnerable species, particularly in highly diverse, complex systems. The Greater Madidi Landscape in the Bolivian Amazon includes several biodiverse protected areas that were created with the goal of sustaining healthy and diverse ecosystems while not impeding the livelihoods of local indigenous peoples. In this study, we sought to use camera trap data and single-species occupancy analysis to assess the impacts of different forms of human activity on four species of small felids: ocelots (Leopardus pardalis), margays (Leopardus wiedii), jaguarundi (Herpailurus yagouaroundi), and oncilla (Leopardus tigrinus). We modeled both human variables (proximity to indigenous communities, roads, and tourist camps) and non-human variables (terrain ruggedness, proximity to rivers, canopy height, prey availability, and large cat abundance). Margay occupancy was unaffected by any of these human variables and ocelots showed only weak evidence of being affected by tourism. Ocelots were particularly pervasive throughout the study area and were consistently estimated to have high occupancy probability. We did not obtain sufficient data on jaguarundi or oncilla to reliably model these effects. Our results indicate that small cats successfully coexist both with each other and with the surrounding human activity in this unique landscape, which serves as a model for global protected area management.