Richness, diversity and abundance of amphibians and lizards were compared in four sites subjected to different fire and grazing regimes in Mburucuyá National Park (Corrientes, Argentina). The surveys were performed using drift fence-pitfall traps randomly distributed in four sites subjected to the following prescribed fire and grazing regimes: (A) no fire or grazing for the last 12 years (control), (B) 3 years since the last prescribed fire, (C) annual prescribed fire and (D) annual prescribed fire and grazing. Fourteen species of amphibians and six species of lizards were captured during the study period (80 days).The lowest values of amphibian richness and abundance were found in sites C and D. The amphibian species Leptodactylus ocellatus and Leptodactylus podicipinus were most abundant in the control site (A). In lizards, no significant differences were found among sites, although Kentropyx viridistriga and Teius oculatus were more abundant in annually burnt sites (C and D). Vegetation variables were correlated with amphibian and lizard species composition. The species differed in their preference for the differently managed sites. The combination of fire and grazing had a negative effect on diversity of amphibians and lizards, with a greater effect on amphibians. Also, fire favoured the presence of some lizard species.

Abstract:The present study reports a qualitative survey of the reptiles present in Río Pilcomayo National Park in Formosa, Argentina. A total of 30 reptile species were recorded between June 2009 and June 2011. Here we provide a checklist that includes relative species abundance, the different habitats present in the national park as well as the national conservation category for each species. In addition, 12 other reptile species cited in the literature for this area are included in the checklist. This study provides baseline information for future research in the park.

<p>Aportamos nueva información sobre la composición, hábitat y distribución de la avifauna del Parque Nacional Mburucuyá. Presentamos datos de diez especies cuya presencia en el Parque no había sido registrada con anterioridad. Además mencionamos otras cinco especies que, aunque contaban con registros previos, poseen particular interés para esta área protegida por su valor para la conservación. El presente trabajo acrecienta el conocimiento de la avifauna del Parque y representa una importante herramienta para la planificación del manejo en el área protegida.</p>

reGistro del YetapÁ de collar (Alectrurus risora) en el parQue nacional rÍo pilcoMaYo, ForMosa, arGentina resuMen Este trabajo confirma la presencia de la especie Alectrurus risora en el Parque Nacional Río Pilcomayo en la provincia de Formosa, Argentina. Se observaron y fotografiaron dos ejemplares de la especie, un individuo macho y una hembra.