19 documents found, page 1 of 2

The costs of evaluating species densities and composition of snakes to assess d...

Studies leading to decision-making for environmental licensing often fail to provide accurate estimates of diversity. Measures of snake diversity are regularly obtained to assess development impacts in the rainforests of the Amazon Basin, but this taxonomic group may be subject to poor detection probabilities. Recently, the Brazilian government tried to standardize sampling designs by the implementation of a sy...

Herpetofauna of the Reserva Extrativista do Rio Gregório, Juruá Basin, southwes...

We present a checklist for reptiles and amphibians of the Reserva Extrativista do Rio Gregório, at the upper Juruá River basin, in the southwest Brazilian Amazonia. Using time-constrained searches, pitfall traps, vocalization, and accidental sightings, we recorded 84 species: 46 amphibians and 38 reptiles. Although analyses suggest still higher diversity, considering the short sampling time, relatively high spe...

Zootherapy in the Amazon: green anaconda ( Eunectes murinus ) fat as a natural ...

Práticas ancestrais de zooterapia (uso das potencialidades terapêuticas da fauna) existem há pelo menos 6000 anos, e têm sido mantidas ao longo de gerações até os tempos modernos. Gordura de animais é comumente utilizada na zooterapia tradicional da América do Sul, e a gordura de serpentes sucuris é amplamente comercializada como cicatrizante natural, embora não existam evidências científicas que mostrem sua ef...

Morphology and geographical distribution of the poorly known snake Umbrivaga py...

The article describes morphology and geographical distribution of the poorly known snake Umbrivaga pygmaea in Brazil. The South American snake genus Umbrivaga Roze, 1964, is found in Colombia, Peru, Ecuador, French Guiana, Venezuela, and Brazil. The hemipenes are slightly bilobed, bearing several spines and apical discs in the distal region of the lobes, which are neither capitate nor calyculate. Inverted, the ...

Geographic range extension of the toad leaf frog Phyllomedusa atelopoides Duell...

A new species of Amazonian snouted treefrog (Hylidae: Scinax) with description ...

The genus Scinax is one of the most specious genera of treefrogs of the family Hylidae. Despite the high number of potential new species of Scinax revealed in recent studies, the rate of species descriptions for Amazonia has been low in the last decade. A potential cause of this low rate may be the existence of morphologically cryptic species. Describing new species may not only impact the taxonomy and systemat...

Hierarchical effects of historical and environmental factors on lizard assembla...

Investigating the role of historical and ecological factors structuring assemblages is relevant to understand mechanisms and processes affecting biodiversity across heterogeneous habitats. Considering that community assembly often involves scale-dependent processes, different spatial scales may reveal distinct factors structuring assemblages. In this study we use arboreal and leaf-litter lizard abundance data f...

Different environmental gradients affect different measures of snake β-diversit...

Mechanisms generating and maintaining biodiversity at regional scales may be evaluated by quantifying β-diversity along environmental gradients. Differences in assemblages result in biotic complementarities and redundancies among sites, which may be quantified through multi-dimensional approaches incorporating taxonomic β-diversity (TBD), functional β-diversity (FBD) and phylogenetic β-diversity (PBD). Here we ...

Contrasting Patterns of Gene Flow for Amazonian Snakes That Actively Forage and...

Knowledge of genetic structure, geographic distance and environmental heterogeneity can be used to identify environmental features and natural history traits that influence dispersal and gene flow. Foraging mode is a trait that might predict dispersal capacity in snakes, because actively foragers typically have greater movement rates than ambush predators. Here, we test the hypothesis that 2 actively foraging s...

Integrative overview of the herpetofauna from serra da mocidade, a granitic mou...

The Brazilian mountain ranges from the Guiana Shield highlands are largely unexplored, with an understudied herpetofauna. Here the amphibian and reptile species diversity of the remote Serra da Mocidade mountain range, located in extreme northern Brazil, is reported upon, and biogeographical affinities and taxonomic highlights are discussed. A 22-days expedition to this mountain range was undertaken during whic...