Ígor Luís Kaefer
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View article: Frog Diversity in Central Amazonian Macrophyte Beds: The Role of Local Environmental Gradients
Frog Diversity in Central Amazonian Macrophyte Beds: The Role of Local Environmental Gradients Open
Ecological assemblages can be shaped by neutral, niche‐based processes, or a combination of both. Understanding the influence of these processes and evaluating diversity measures based on taxonomic, functional, and phylogenetic metrics on …
View article: Effects of climate change and El Niño anomalies on historical declines, extinctions, and disease emergence in Brazilian amphibians
Effects of climate change and El Niño anomalies on historical declines, extinctions, and disease emergence in Brazilian amphibians Open
Amphibian declines, linked to climate change and disease, pose a global challenge, yet their primary drivers remain debated. We investigated the historical decline of Brazilian amphibians by assessing the influence of climate change, extre…
View article: Phylogenetic assessment of <i>Plasmodium</i> (<i>Saurocytozoon</i>) <i>tupinambi</i> comb. nov. (Haemosporida, Plasmodiidae) in golden tegu lizards: shedding light on a long-standing Haemosporida taxonomic puzzle
Phylogenetic assessment of <i>Plasmodium</i> (<i>Saurocytozoon</i>) <i>tupinambi</i> comb. nov. (Haemosporida, Plasmodiidae) in golden tegu lizards: shedding light on a long-standing Haemosporida taxonomic puzzle Open
Haemosporidians constitute a monophyletic group of vector-borne parasites that infect a wide range of vertebrate hosts, including Neotropical lizards. The remarkable diversity of these host-parasite associations and inadequate research on …
View article: Cryptic diversity and historical biogeography of a nurse‐frog species complex (<i>Allobates tinae</i>): Insights on biotic diversification in Brazilian southwestern Amazonia
Cryptic diversity and historical biogeography of a nurse‐frog species complex (<i>Allobates tinae</i>): Insights on biotic diversification in Brazilian southwestern Amazonia Open
Amazonia continuously reveals outstanding biotic diversity and endemism, but our comprehension regarding their underlying processes has been impaired by knowledge gaps on cryptic taxonomic diversity. Here, we clarified the diversity and hi…
View article: ANOMALIES IN THREE FROG SPECIES FROM EASTERN AMAZONIA
ANOMALIES IN THREE FROG SPECIES FROM EASTERN AMAZONIA Open
We reported anomalies in three anuran species belonging to two families: Craugastoridae (Pristimantis gutturalis and P. chiastonotus), and Bufonidae (Rhinella castaneotica). All records were found in two conservation units, a well-preserve…
View article: Distribution and diversification of Adelphobates, emblematic poison frogs from Brazilian Amazonia
Distribution and diversification of Adelphobates, emblematic poison frogs from Brazilian Amazonia Open
Adelphobates contains three species, and the inaccurate identification of A. quinquevittatus and the scarcity of records of A. castaneoticus complicate inference of their distributions; the latter species occurs in sympatry with A. galacto…
View article: Statement of Peer Review—Immersing in a Neglected Problem Inside the Amazon Jungle: Abstracts of the 1st International Symposium on Research in Venomous Animals, Manaus, Brazil
Statement of Peer Review—Immersing in a Neglected Problem Inside the Amazon Jungle: Abstracts of the 1st International Symposium on Research in Venomous Animals, Manaus, Brazil Open
In submitting conference proceedings to the 1st International Symposium on Research in Venomous Animals, Manaus, Brazil, 2–5 May 2023, the volume editors of the proceedings certify to the publisher that all abstracts published in thi…
View article: Immersing in a Neglected Problem Inside the Amazon Jungle: Abstracts of the 1st International Symposium on Research in Venomous Animals, Manaus, Brazil
Immersing in a Neglected Problem Inside the Amazon Jungle: Abstracts of the 1st International Symposium on Research in Venomous Animals, Manaus, Brazil Open
The Amazon represents the world’s greatest biodiversity and covers different countries in South America, including Brazil with the largest area. The interaction between the resident population of this area and its ecosystem is respon…
View article: A new pale-ventered nurse frog (Aromobatidae: Allobates) from southwestern Brazilian Amazonia
A new pale-ventered nurse frog (Aromobatidae: Allobates) from southwestern Brazilian Amazonia Open
We use integrative taxonomy to formally describe a candidate species of nurse frog of the genus Allobates from southwestern Brazilian Amazonia. The new species nests within a clade that has been defined historically as A. gasconi , but it …
View article: The challenge in detecting risk areas of snakebite when case rates are low: the case of Amazonian coral snakes
The challenge in detecting risk areas of snakebite when case rates are low: the case of Amazonian coral snakes Open
Identifying risk areas for envenomation by animals is relevant for public health, such as strategic distribution of antivenoms. Coral snakes are highly diverse in the Amazon, inhabit natural and human-modified environments, and the outcome…
View article: The Amazonian kambô frog Phyllomedusa bicolor (Amphibia: Phyllomedusidae): Current knowledge on biology, phylogeography, toxinology, ethnopharmacology and medical aspects
The Amazonian kambô frog Phyllomedusa bicolor (Amphibia: Phyllomedusidae): Current knowledge on biology, phylogeography, toxinology, ethnopharmacology and medical aspects Open
Phyllomedusa bicolor (Phyllomedusidae), popularly known as the kambô in Brazil, is a tree frog that is widely distributed in South American countries and is known for producing a skin secretion that is rich in bioactive peptides, which are…
View article: A framework for quantifying soundscape diversity using Hill numbers
A framework for quantifying soundscape diversity using Hill numbers Open
Soundscape studies are increasingly used to capture landscape‐scale ecological patterns. Yet, several aspects of soundscape diversity remain unexplored. Although some processes influencing acoustic niche usage may operate in the 24‐hr temp…
View article: A framework for the quantification of soundscape diversity using Hill numbers
A framework for the quantification of soundscape diversity using Hill numbers Open
Soundscape studies are increasingly common to capture landscape-scale ecological patterns. Yet, several aspects of soundscape diversity quantification remain unexplored. Although some processes influencing acoustic niche usage may operate …
View article: Xanthism in Phyllomedusidae (Amphibia: Anura), with a review on anuran colour anomalies.docx
Xanthism in Phyllomedusidae (Amphibia: Anura), with a review on anuran colour anomalies.docx Open
We have compiled a list of colour anomalies in anurans by accessing papers published in the journals Herpetological Review, Herpetology Notes, and Herpetological Bulletin, as well as via Internet searches using the keywords ‘color/colour/c…
View article: The behavioural ecology behind anti-predator mechanisms: diversity, ontogenetic changes and sexual differences in anuran defence behaviours
The behavioural ecology behind anti-predator mechanisms: diversity, ontogenetic changes and sexual differences in anuran defence behaviours Open
Anti-predator mechanisms play a key role in the survival of any animal in nature. Anurans exhibit a great diversity of defensive behaviours and interact with the widest range of predators of any vertebrates. However, there are few systemat…
View article: Under the light: high prevalence of haemoparasites in lizards (Reptilia: Squamata) from Central Amazonia revealed by microscopy
Under the light: high prevalence of haemoparasites in lizards (Reptilia: Squamata) from Central Amazonia revealed by microscopy Open
Blood samples from 330 lizards of 19 species were collected to investigate the occurrence of haemoparasites. Samplings were performed in areas of upland (terra-firme) forest adjacent to Manaus municipality, Amazonas, Brazil. Blood parasite…
View article: Effect of environmental parameters on squamate reptiles in an urban forest fragment in central Amazonia
Effect of environmental parameters on squamate reptiles in an urban forest fragment in central Amazonia Open
The increasing urbanization of the Amazonian biome has promoted the creation of several forest fragments surrounded by an urban matrix, but the relationship of animal assemblages to the urban environment, especially in forest fragments, is…
View article: Effect of environmental parameters on squamate reptiles in an urban forest fragment in central Amazonia
Effect of environmental parameters on squamate reptiles in an urban forest fragment in central Amazonia Open
The increasing urbanization of the Amazonian biome has promoted the creation of several forest fragments surrounded by an urban matrix, but the relationship of animal assemblages to the urban environment, especially in forest fragments, is…
View article: Hierarchical effects of historical and environmental factors on lizard assemblages in the upper Madeira River, Brazilian Amazonia
Hierarchical effects of historical and environmental factors on lizard assemblages in the upper Madeira River, Brazilian Amazonia Open
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…
View article: Hidden diversity within the broadly distributed Amazonian giant monkey frog (Phyllomedusa bicolor: Phyllomedusidae)
Hidden diversity within the broadly distributed Amazonian giant monkey frog (Phyllomedusa bicolor: Phyllomedusidae) Open
Phyllomedusa bicolor is a large-sized nocturnal tree frog found in tropical rainforests throughout much of the Amazonian region of Brazil, Colombia, Bolivia, Peru, Venezuela, and the Guianas. Very little is known about P. bicolor genetic d…
View article: Under the light: high prevalence of haemoparasites in lizards (Reptilia: Squamata) from Central Amazonia revealed by microscopy
Under the light: high prevalence of haemoparasites in lizards (Reptilia: Squamata) from Central Amazonia revealed by microscopy Open
Blood samples from 330 lizards of 19 species were collected to investigate the occurrence of haemoparasites. Samplings were performed in areas of upland (terra-firme) forest adjacent to Manaus municipality, Amazonas, Brazil. Blood parasite…
View article: Species richness and composition of snake assemblages in poorly accessible areas in the Brazilian Amazonia
Species richness and composition of snake assemblages in poorly accessible areas in the Brazilian Amazonia Open
Snakes are a diverse group of terrestrial vertebrates of the order Squamata. Despite that, in the Amazonian biome, information about distribution and identification of snakes is limited when compared to other groups. Additionally, in Amazo…
View article: Sampling design may obscure species–area relationships in landscape‐scale field studies
Sampling design may obscure species–area relationships in landscape‐scale field studies Open
We investigated 1) the role of area per se in explaining anuran species richness on reservoir forest islands, after controlling for several confounding factors. We also assessed 2) how sampling design affects the inferential power of islan…
View article: “<i>Bad things come in small packages</i>”: predicting venom-induced coagulopathy in <i>Bothrops atrox</i> bites using snake ontogenetic parameters
“<i>Bad things come in small packages</i>”: predicting venom-induced coagulopathy in <i>Bothrops atrox</i> bites using snake ontogenetic parameters Open
Introduction: Snake venom composition shows significant inter- and intra-species variation. In the case of the viperid species Bothrops atrox, responsible for the majority of snakebites in the Amazon region, geographical and ontogenetic va…
View article: The lizards along the road BR-319 in the Purus-Madeira interfluve, Brazilian Amazonia (Squamata, Lacertilia)
The lizards along the road BR-319 in the Purus-Madeira interfluve, Brazilian Amazonia (Squamata, Lacertilia) Open
Here we present data on the identity and geographic distribution of lizard taxa in the Purus-Madeira interfluve, along the road BR-319 in Brazilian Amazonia. We sampled 10 modules located at least 40 kilometres from each other. Data collec…
View article: Scale-dependent estimates of niche overlap and environmental effects on two sister species of Neotropical snakes
Scale-dependent estimates of niche overlap and environmental effects on two sister species of Neotropical snakes Open
Detecting ecological patterns is highly dependent on the spatial scale of the analysis. However, the importance of scale has been poorly explored when testing environmental influences and estimating niche overlap between animal species. In…