Diego Bueno Villafañe

Instituto de Investigación Biológica del Paraguay · Herpetology

Gymnophthalmidae is a highly diverse family of small to medium sized South American lizards. In Paraguay, seven species are currently known. Among these, Colobosaura modesta and Micrablepharus maximiliani are two poorly sampled species in the country: C. modesta was only recorded in two localities in Amambay and San Pedro Departments, whilst M. max...

Oxyrhopus petolarius se distribuye desde el sur de México hasta el Departamento de Itapúa en Paraguay y la provincia de Misiones en Argentina. En Paraguay cuenta con escasos registros todos en el Bosque Atlántico a excepción de uno, en el Pantanal paraguayo. Reportamos un ejemplar juvenil de O. petolarius en el Distrito de Capitán Carmelo Peralta,...

Wetlands are essential habitats for amphibians, but for many species, no information is available regarding how and when they make use of the different environments within the upland-wetland ecotone, nor which variables affect spatial and temporal distribution. We sought to determine the habitat preferences of two tree frog species using a capture-...

Despite its vast extension and the rich fauna that it hosts, the Paraguayan Humid Chaco is one of the least studied ecoregions in the country. In this study, we provide a list of birds and medium-sized and large mammals recorded with camera traps in Estancia Playada, a private property located south of Occidental region in the Humid Chaco ecoregion...

Species tend to be less abundant at the limits of their geographic distribution. Giant and lesser anteaters have their southernmost limits in Argentina and Paraguay, where scarce information exists regarding their ecology and conservation. We present a study carried out in the Paraguay River floodplain, in an area dedicated to cattle rearing using...

Ontogenetic colour change (OCC) is defined as the progressive and non-reversible process of changes in colouration of organisms associated with their development. Among the many vertebrate groups, amphibians are particularly impressive for their strikingly wide variety of colours, colour patterns, and signals, whose evolutionary and ecological sign...

Se establecieron 8 transectos a lo largo (1,6 km) del humedal en su transición a río. En cada transecto se tomaron muestras de calidad de agua que fueron analizadas en el laboratorio (48 muestras en 6 campañas), se identificaron las especies vegetales dentro del humedal y en el bosque ripario (16 parcelas de 100 m²) y se colocaron 173 tubos PVC par...

This work is based on a wide range of research carried out in an area of livestock production in the ecoregion of the Humid Chaco in the past five years. The studies took place in cattle ranching establishments located on the Paraguay River floodplain, dedicated to low intensity livestock production in silvopastoral systems based on native vegetati...

The evaluation of the conservation status is a planning tool that allows to take actions for the preservation of these. Paraguay suffers an accelerated loss of habitats, due to the high rate of deforestation due to the land-use change, for which this tool plays a fundamental role in the conservation of biodiversity. Law 96 of 1992, contemplates the...

La evaluación del estado de conservación es una herramienta de planificación que permite tomar acciones para la preservación de estas. Paraguay sufre una acelerada pérdida de hábitats, debido a la alta tasa de deforestación por el cambio de uso de la tierra, por la que esta herramienta cumple un papel fundamental en la conservación de la biodiversi...

In this study we assessed the efficacy of Visible Implant Alphanumeric (VIA) for marking adults and juveniles of the Neotropical treefrog Scinax nasicus. We evaluated the success of this technique in the identification of individuals and the prevalence of tags in the field. As a control, we marked the same individuals through toe-clipping. Of 196 m...

Raw data of water quality samples collected in a wetland in the Humid Chaco in Paraguay. 2017-2018. Data usable with authors previous consent. Includes weather and vegetation variables. Other site variables currently under analysis. All data collected with Project PINV 15-143 Aporte multidisciplinario a la eco-hidrología de los humedales del Chaco...

Musálem, K., F. P. Barrios, A. Wehrle, R. Laino, A. Caballero-Gini, D. Bueno, M. L. Aranda, N. Musálem. Weather Station Raw Data. WMO 86181 (24.9 S - 57.3 W 67 m. 20 km East of Benjamín Aceval, President Rutherford Hayes, Paraguay). American Chaco Research Center, Manuel Gondra Foundation, Dirección Nacional de Aeronáutica Civil, Dirección de Meter...

We studied the abundance and habitat use of Crax fasciolata using camera-traps in different types of forests in the Humid Chaco of Paraguay. We obtained 114 records with a total sampling effort of 996 camera-days, most of them from one and two individuals, with a maximum of five individuals. The highest number of records was obtained in the riparia...

Animales del Chaco Húmedo – Paraguay Todas las fotos fueron tomadas dentro de la Estancia Playada entre los años 2015 y 2018 por investigadores, estudiantes y cámaras trampa donadas por IDEA WILD. El collage de fotos fue realizado por Rafaela Laino (2018) y los nombres en guaraní fueron validados por personas que viven en la zona de estudio. La Es...

Assessment of amphibians in the Humid Chaco in Paraguay in an extensive cattle ranch experimental site.

Variation in body size represents one of the crucial raw materials for evolution. However, at present, it is still being debated what is the main factor affecting body size or if the final body size is the consequence of several factors acting synergistically. To evaluate this, widespread species seem to be suitable models because the different pop...

Mico melanurus is an endangered primate in Paraguay, with most Paraguayan records in the vicinity of Agua Dulce (Defensores del Chaco National Park). We report the first well-documented locality outside of the Agua Dulce/Linea 1 transect, representing the most northeastern record in Paraguay, as well as a new habitat for the species, transitional P...

Biodiversity is greatly affected by human disturbances affecting ecosystems around the world, of which habitat loss is the mayor of the threats. In recent years, the Gran Chaco has been subject to the highest rates of deforestation worldwide, in the West region of Paraguay is the regional leader in rates of deforestation, mainly for livestock expan...

Chacophrys pierottii is a medium-sized frog with generalist and opportunistic predation habits, and its diet includes mainly small vertebrates and arthropods. During a fieldtrip in Defensores del Chaco National Park (Alto Paraguay department, Paraguay), at the base of Cerro León we observed a juvenile male Chacophrys pierottii feeding on a juvenile...

Four species of Pseudopaludicola, Pseudopalud­ icola boliviana, P. falcipes, P. mystacalis and P. ternetzi, are usually cited for Paraguay. However, after analyzing 407 specimens assigned to this genus in herpetological collections of the country, we conclude that there are no specimens of P. falcipes in Paraguayan collections or vouchers cited in...

The snake genus Philodryasis distributed in South America and is characterized by having dorsal scale rows with reduction before the vent, rounded pupils, enlarged diastema in maxilla and opistoglyph dentition. Nine species are recorded from Paraguay: Philodryas aestiva, P. agassizii,P. baroni,P. livida,P. mattogrossensis,P. nattereri,P. olfersii,...

Elachistocleis haroi (Anura: Microhylidae) was described from the provinces of Jujuy, Salta and Formosa in Argentina and the Tarija department in Bolivia. Based on specimens housed in the Museo Nacional de Historia Natural del Paraguay and Colección Zoológica de la Facultad de Ciencias Exactas y Naturales, we extend the range of the species to the...

Resumen.-El presente trabajo extiende a Paraguay la distribución geográfica de Hypostomus peckoltoides, especie originalmente descrita del Río Cuiabá, mayor tributario del Río Paraguay. El espécimen examinado fue colectado en el año 1995 en el Río Tebicuary, Villa Florida, Misiones, Paraguay. Además reportamos variaciones en el número de bandas tra...