Arley Camargo

Universidad de la República de Uruguay | UdelaR · Centro Universitario de la Región Noreste

Interspecific hybridization has been historically neglected in research and conservation practice, but it is a common phenomenon in nature, and several models have been developed to characterize it genetically. Even though Trichechus inunguis (Amazonian manatee) and T. manatus (West Indian manatee) exhibit large morphological, karyotypic, and molec...

In this study, we explore the applicability of DNA barcoding, specifically targeting the chloroplast DNA (cpDNA) sequences, particularly the trnL (UAA) intron region, to analyze the diet of gray brocket deer. This approach offers improved taxonomic resolution and the ability to identify species with greater precision compared to traditional methods...

Understanding which factors driving the genetic structure, geographic distribution patterns, and divergence of populations/species are of great interest in ecology and evolutionary biology. Phylogeographic and species hypotheses combined to distribution models may elucidate which phenomena drove evolutionary history of the biota of different biomes...

Principal Component Analysis (PCA) is one of the most broadly used statistical methods for the ordination and dimensionality-reduction of multivariate datasets across many scientific disciplines. Trivial PCs can be estimated from data sets without any correlational structure among the original variables, and traditional criteria for selecting non-t...

Intersexual morphological differences within a species occur in many traits, including body size and shape. Many processes that cause geographic variability in morphology have been proposed: population structure, phenotypic plasticity (environmental effects on development), and natural and/or sexual selection. Several hypotheses can explain pattern...

Table S1. Detail of the specimens used for this study. LJAMM: Herpetological collection of the Centro Nacional Patagónico (CENPAT-CONICET), Puerto Madryn, Chubut, Argentina. ZVC-R: Vertebrate Zoology collection of the Faculty of Sciences, Montevideo, Uruguay. UFRGST: collection of the Herpetology Laboratory of the Federal University of Rio Grande d...

Table S2. Posterior probabilities of the number of species and each candidate species estimated by BPP 3.4 for all the replicates run. Each combination of starting tree and priors for Θ and τ (a-d) where run under four different seeds which are indicated with ’. Top1: ((((A, B), H), (C, D)), (E, (F, G))); Top2: ((((A, H), B), (C, D)), (E, (F, G)));...

Table S3. Lineage assignment for each of the 113 individual of Liolaemus wiegmannii with ddRADseq data, according to DAPC and RAxML. A: South-Central Argentina; B: Uruguay; D: Catamarca; E: Tucumán & Salta I; F: Jujuy and G: Salta II. All the individuals that belong to the lineage Mendoza C from BPP are recovered as part of lineage A (using ddRADse...

Figure S2. K values explored for the Liolaemus wiegmannii complex based on 3912 SNPs. Blue circle represents the best K under BIC (A) and AIC (B) criteria.

Figure S1. Bayesian cytochrome b genealogy of the Liolaemus wiegmannii complex considering haplotypes of L. gardeli and two unique haplotypes of Argentina: LJAMM 13266 (25 km N Villa Mercedes, General Pedernera Department, San Luis Province) and LJAMM 3132 (Copacabana, Sierras de Córdoba, Córdoba Province). Correspondence between colors and lineage...

In this contribution, the aspects of reptile and amphibian speciation that emerged from research performed over the past decade are reviewed. First, this study assesses how patterns and processes of speciation depend on knowing the taxonomy of the group in question, and discuss how integrative taxonomy has contributed to speciation research in thes...

Speciation processes have long been inferred from phylogenetic, phylogeographic, and biogeographic pattern-driven perspectives. Now much current speciation research is attempting to more directly describe the underlying processes and mechanisms of divergence leading to speciation. Ideally, researchers should integrate both process-and pattern-based...

Speciation processes have long been inferred from phylogenetic, phylogeographic, and biogeographic pattern-driven perspectives. Now much current speciation research is attempting to more directly describe the underlying processes and mechanisms of divergence leading to speciation. Ideally, researchers should integrate both process- and pattern-base...

While phylogenetic studies have shown covariation between the properties of spider major ampullate (MA) silk and web building, both spider webs and silks are highly plastic so we cannot be sure whether these traits functionally co‐vary or just vary across environments that the spiders occupy. Since MaSp2‐like proteins provide MA silk with greater e...

Protected areas (PAs) are essential for biodiversity conservation, but their coverage is considered inefficient for the preservation of all species. Many species are subdivided into evolutionarily significant units (ESUs) and the effectiveness of PAs in protecting them needs to be investigated. We evaluated the usefulness of the Brazilian PAs netwo...

Conference presentation

Intraspecific morphological variation is a relatively common pattern among lizards, where several selective factors have been suggested as responsible for this phenomenon. For instance, geographic variation could result from natural selection along with historical processes, whereas sexual dimorphism has usually been attributed to sexual selection,...

Conference presentation

Climate change could either directly or indirectly cause population declines via altered temperature, rainfall regimes, food availability or phenological responses. However few studies have focused on allocation trade-offs between growth and reproduction under marginal resources, such as food scarce that may be caused by climate warming. Such criti...

A phylogeny of the species-rich clade of the Neotropical frog genus Leptodactylus sensu stricto is presented on the basis of a total evi- dence analysis of molecular (mitochondrial and nuclear markers) and non-molecular (adult and larval morphological and behavioral characters) sampled from > 80% of the 75 currently recognized species. Our results...

Until recently, most phylogeographic approaches have been unable to distinguish between demographic and range expansion processes, making it difficult to test for the possibility of range expansion without population growth and vice versa. In this study, we applied a Bayesian phylogeographic approach to reconstruct both demographic and range expans...

Molecular phylogenetics has entered a new era in which species trees are estimated from a collection of gene trees using methods that accommodate their heterogeneity and discordance with the species tree. Empirical evaluation of species trees is necessary to assess the performance (i.e., accuracy and precision) of these methods with real data, whic...

Species delimitation is a major research focus in evolutionary biology because accurate species boundaries are a prerequisite for the study of speciation. New species delimitation methods (SDMs) can accommodate nonmonophyletic species and gene tree discordance as a result of incomplete lineage sorting via the coalescent model, but do not explicitly...

The aim of this work is to summarize the scientific knowledge of Uruguayan reptiles. In this study we considered 61 species of reptiles based on 4700 records from the main scientific collections of the country. We derived geographic distributions from georeferenced records superimposed on a grid of 302 quadrants and we generated a cumulative curve...

Intrapopulation variation includes age and sexual variation, but also individual niche specialization. Individual specialization has important effects on dynamics at population or community levels. Environmental variation and intraspecific interactions are factors that can promote or enhance this kind of variation. Despite its relevance, knowledge...

In the course of a herpetological survey of the summit of the Cumbres Calchaquíes Mountains, on a rocky outcrop facing south east, near Provincial Road 352 (26º22'45.7"S, 65º43'54.7"W, 3612 m), 38.3 km W Hualinchay, Trancas Department, Tucumán Province, on 16 December 2009 at ca. 1500, we found an adult male scorpion (Brachistosternus intermedius)...

Lizards have been model organisms for ecological and evolutionary studies from individual to community levels at multiple spatial and temporal scales. Here we highlight lizards as models for phylogeographic studies, review the published population genetics/phylogeography literature to summarize general patterns and trends and describe some studies...

The native species of amphibians and reptiles of Uruguay were categorized according to the IUCN Red List criteria. Out of 47 amphibian species, seven are listed as Critically Endangered (CR), five as Endangered (EN), one as Vulnerable (VU), three as Near Threatened (NT), and two as Data Deficient (DD); the remaining species are considered to be Lea...

The aim of this work is to update the scientific knowledge of Uruguayan amphibians. We address the trends of studies since the beginning of the 19 th century until today, describing the transition from descriptive studies focused on natural history to modern evolutionary and ecological perspectives. In order to assess the inventory completeness of...

The frog Leptodactylus validus occurs in northern South America, Trinidad and Tobago, and the southern Lesser Antilles (Grenada and St. Vincent). Mitochondrial DNA sequences were used to perform a nested clade phylogeographic analysis (NCPA), to date colonization events, and to analyze colonization patterns using on a relaxed molecular clock and co...

Patterns of reproductive allocation are expected to differ between species according to temporally and spatially variable costs of reproduction. Even when reproductive allocation patterns are the same, species can also differ in how the reproductive effort is allocated between offspring number and size. In this study, we compared the reproductive a...

Calling activity of anuran assemblages were related to seasonal changes in weather factors such as temperature and rainfall. We evaluated the suitability of these variables as determinants of activity of an assemblage and compared them against a sinusoidal model that considered month as a “latent variable” related to seasonality. Activity patterns...

We studied the diet of Elachistocleis bicolor captured in pine, eucalypt, and unmodified environments in Uruguay. Comparisons between seasons (active, inactive) and among three environments (pine, eucalypt, unmodified), were made using rarefaction analyses, importance indices, and non-parametric tests. Elachistocleis bicolor has a specialized diet...

Leptodactylus fuscus is a neotropical frog ranging from Panamá to Argentina, to the east of the Andes mountains, and also inhabiting Margarita, Trinidad, and the Tobago islands. We performed phylogenetic analyses of 12S rRNA, 16S rRNA, tRNA-Leu, and ND1 mitochondrial (mt) DNA sequences from specimens collected across the geographic distribution of...

The phenomenon known as the global decline of amphibian populations is a controversial issue at the present day. The basic knowledge of the species biology contributes to distinguish natural fluctuations from populational declining trends. The modification of coastal areas, at a global and local level, makes it necessary to gather data that may all...

Two key life history attributes are temporal reproductive patterns and inter- and intraspecific variation in clutch size. In this work, we collected individuals of Physalaemus gracilis in Espinas stream (Maldonado, Uruguay) to analyze the cor- relation of activity with environmental variables and to evaluate the influence of reproductive investment...

4 ABSTRACT: The validity of the monotypic leptodactylid frog genus Vanzolinius Heyer, 1974 has been questioned recently. We explore the relationships of Vanzolinius discodactylus within the cluster of closely related genera Adenomera, Leptodactylus, and Lithodytes with both morphological and molecular data sets. Morphological and combined morpholog...

The diet of Leptodactylus ocellatus (L., 1758) was studied in specimens collected at Maldonado Department (Uruguay), where monthly surveys were made between August 1998 and March 2000. A total of 143 frogs were collected, measured, sexed, and dissected, to assess stomach contents. The anurans were grouped into three age classes and four categories...

The diet of four sympatric anurans species was studied, from October 1998 to November 1999, in a temperate Neotropical environment (Espinas Stream, Maldonado, Uruguay). A total of 387 individuals were collected and their stomach prey content, examined (186 Physalaemus gracilis, 88 Leptodactylus ocellatus, 96 Hyla p. pulchella and 17 Bufo gr. granul...