Proporción de área usada por Ateles hybridus , Alouatta seniculus y Cebus versicolor en el Parque Nacional Natural Selva de Florencia, Caldas, Colombia

The PNN Selva de Florencia, in the central Andes of Colombia, is reservoir of a large biodiversity including five species of primates. Despite being a protected area, there are anthropic transformation processes that directly affect their ecosystems. Currently, we do not have quantitative models that allow us to estimate the effect of these transformations on primate populations. We evaluated the proportion of the area used (ψ), as an abundance estimation of the primates Ateles hybridus, Alouatta seniculus, and Cebus versicolor. Our methods included random sampling in 31 plots of 1 km2, where we evaluated i) primate presence; ii) human presence; as well as the percentage of: iii) plantations; iv) pastures; and v) natural coverage, using a 1:25 000 Corine Land Cover map, adapted to Colombia. We followed a Bayesian approach to analyze our dataset. We report a ψ of 0.16, and 0.14 detection probability for A. hybridus, with a decreasing area use in forest; a ψ of 0.83, and detection probability of 0.14 for A. seniculus, with a decreasing area use in plantations; finally, we estimated a ψ of 0.36, and 0.08 detection probability for C. versicolor, with a decreasing area use in plots with human presence. Data in our work can be used as input for the design and implementation of effective monitoring in this protected area.