In this work, the vertical stratification in Pristimantis species was studied in a remanescent forest dominated by bamboo in the southwest region of the Amazon. The field work was carried out between December 2012 and May 2013. The differences in height of the perch were analyzed interspecifically, and intraspecific in relation to the structure of the vegetation. A total of four species were recorded, Pristimantis fenestratus being the most abundant and occurring in all sampling units. There was significant interspecific difference in perch height, as well as between adults and juveniles. For P. fenestratus, there was no differentiation of segregation between sampling units. The structure of the vegetation did not explain the preference of heights; however, leaf litter depth influenced its vertical stratification. More data and occurrences are needed in all sampling units to infer better...

In this work, the vertical stratification in Pristimantis species was studied in a remanescent forest dominated by bamboo in the southwest region of the Amazon. The field work was carried out between December 2012 and May 2013. The differences in height of the perch were analyzed interspecifically, and intraspecific in relation to the structure of the vegetation. A total of four species were recorded, Pristimantis fenestratus being the most abundant and occurring in all sampling units. There was significant interspecific difference in perch height, as well as between adults and juveniles. For P. fenestratus, there was no differentiation of segregation between sampling units. The structure of the vegetation did not explain the preference of heights; however, leaf litter depth influenced its vertical stratification. More data and occurrences are needed in all sampling units to infer better...

Knowledge of the biodiversity of amphibians and reptiles is essential in developing conservation for these taxa. We collected data from visual encounters and bibliographic review to determine the diversity of amphibians and reptiles in different habitats in the Putumayo–Napo–Amazonas interfluvium. This interfluvium presents 140 species of amphibians and 108 reptiles. The hill forest had the highest species richness, with 58 species of amphibians and 40 species of reptiles. The richest families were Hylidae and Colubridae. The Hilids presented a greater number of species in flooded ecosystems, while the Craugastoridae and Bufonidae families had greater richness in non-flooded ones. The Colubridae family was present in both ecosystems, although with a greater presence in flooded habitats. A community similarity analysis showed two groups: one formed by the amphibians of the high terrac...

El conocimiento de la biodiversidad de anfibios y reptiles es fundamental para proponer la conservación de estos taxa. En este trabajo se realizaron registros por encuentros visuales y recopilación bibliográfica para conocer la diversidad de anfibios y reptiles por tipos de hábitats en el interfluvio Putumayo–Napo–Amazonas. Nuestros resultados muestran la existencia de 140 especies de anfibios y 108 reptiles. El bosque de colina tuvo mayor riqueza de especies (58 especies de anfibios y 40 de reptiles). Las familias con mayor riqueza fueron Hylidae (38 especies) y Colubridae (39 especies). El análisis de similitud de hábitats en anfibios mostró dos grupos: de los bosques de terraza alta, terraza media y bosque de colinas y del bosque de terraza baja, aguajal y varillal pantanoso. En los reptiles también se formaron dos grupos: de los de aguajal, bosque de colinas y terraza alt...

Estudiamos la historia natural de Osteocephalus castaneicola en el suroeste de la Amazonia. Usamos observaciones de un experimento no exitoso pero relevante, entre enero de 2009 y enero de 2010 en la Fazenda Experimental Catuaba, así como de registros de diez recipientes para almacenamiento de látex entre enero y marzo del 2011 y 2012 en la Fazenda Bonal. Los datos de campo de ambas áreas y de colecciones biológicas permitieron mostrar aspectos de su reproducción en fitotelmata, variación fenotípica, canto de anuncio y generar un mapa de distribución actual de Osteocephalus castaneicola. Esta especie evidenció una gran plasticidad reproductiva en los tipos de fitotelmata, desde la preferencia de bambús muertos y cápsulas de castaña brasileña (Bertholletia excelsa) en el suelo, hasta huecos de árboles en diferentes estratos cerca al dosel. Hubo diferencia en el número de hu...

Knowledge of the biodiversity of amphibians and reptiles is essential in developing conservation for these taxa. We collected data from visual encounters and bibliographic review to determine the diversity of amphibians and reptiles in different habitats in the Putumayo–Napo–Amazonas interfluvium. This interfluvium presents 140 species of amphibians and 108 reptiles. The hill forest had the highest species richness, with 58 species of amphibians and 40 species of reptiles. The richest families were Hylidae and Colubridae. The Hilids presented a greater number of species in flooded ecosystems, while the Craugastoridae and Bufonidae families had greater richness in non-flooded ones. The Colubridae family was present in both ecosystems, although with a greater presence in flooded habitats. A community similarity analysis showed two groups: one formed by the amphibians of the high terrac...

Los cambios climáticos que se han producido en las últimas décadas han influenciado en las tendencias y fluctuaciones poblacionales de muchas especies amazónicas, incluyendo los guacamayos. Entre 2006 y 2015, se cuantificaron guacamayos en la cuenca media del río Samiria en Perú. Los conteos por puntos distribuidos a lo largo de ocho transectos acuáticos en los sectores de Tacshacocha y Huishtococha se aplicaron durante los períodos de creciente y vaciante del río, para determinar la abundancia de guacamayos y los posibles cambios debido a eventos climáticos. Un total de 4225 pseudoréplicas en 72 estaciones de puntos de conteo resultaron en 65 149 avistamientos de guacamayos. Registramos cinco especies: Orthopsittaca manilatus, Ara ararauna, Ara severus, Ara chloropterus y Ara macao. Los resultados mostraron una alta consistencia durante los diez años, siendo O. manilatus la ...

Los cambios climáticos que se han producido en las últimas décadas han influenciado en las tendencias y fluctuaciones poblacionales de muchas especies amazónicas, incluyendo los guacamayos. Entre 2006 y 2015, se cuantificaron guacamayos en la cuenca media del río Samiria en Perú. Los conteos por puntos distribuidos a lo largo de ocho transectos acuáticos en los sectores de Tacshacocha y Huishtococha se aplicaron durante los períodos de creciente y vaciante del río, para determinar la abundancia de guacamayos y los posibles cambios debido a eventos climáticos. Un total de 4225 pseudoréplicas en 72 estaciones de puntos de conteo resultaron en 65 149 avistamientos de guacamayos. Registramos cinco especies: Orthopsittaca manilatus, Ara ararauna, Ara severus, Ara chloropterus y Ara macao. Los resultados mostraron una alta consistencia durante los diez años, siendo O. manilatus la ...

The climatic changes that have occurred in the last decades have influenced the trends and population fluctuations of many Amazonian species, including the macaws. Between 2006 and 2015, macaws were quantified on the mid watershed of the Samiria river in Peru. Point counts distributed along 8 aquatic transects on the Tacshacocha and Huishtococha sectors were applied during growing and dry seasons to determine macaw abundance and the possible changes due to climatic events. With a total of 4225 pseudo-replications in 72 counting point stations, there were 65 149 macaw sightings. We recorded five species: Orthopsittaca manilatus, Ara ararauna, Ara severus, Ara chloropterus and Ara macao. The result displayed high consistency during the ten years, with O. manilatus being the most abundant species and the rarest species A. chloropterus and A. macao; with both groups showing differences betwe...