A5068920291- Animal Behavior and Reproduction
- Plant and animal studies
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Animal Vocal Communication and Behavior
- Avian ecology and behavior
- Identification and Quantification in Food
- Genetic diversity and population structure
- Animal Ecology and Behavior Studies
- Wildlife Ecology and Conservation
- Rangeland and Wildlife Management
- Neurobiology and Insect Physiology Research
- Reproductive biology and impacts on aquatic species
- Amphibian and Reptile Biology
- Entomological Studies and Ecology
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Plant Reproductive Biology
- Physiological and biochemical adaptations
- Bat Biology and Ecology Studies
- Aquaculture Nutrition and Growth
- Fish biology, ecology, and behavior
- Marine Ecology and Invasive Species
- Blood donation and transfusion practices
- Blood transfusion and management
Bernardino Rivadavia Natural Sciences Museum
2015-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2015-2023
Cornell University
2019-2023
Cornell Lab of Ornithology
2019-2023
H.B. Fuller (United States)
2020
Because the tropical regions of America harbor highest concentration butterfly species, its fauna has attracted considerable attention. Much less is known about butterflies southern South America, particularly Argentina, where over 1,200 species occur. To advance understanding this fauna, we assembled a DNA barcode reference library for 417 focusing on Atlantic Forest, biodiversity hotspot. We tested efficacy specimen identification, used it to assess frequency cryptic and examined...
Abstract The riverine barrier hypothesis proposes that large rivers represent geographical barriers to gene flow for terrestrial organisms, leading population differentiation and ultimately allopatric speciation. Here we assess the first time if subtropical Paraná–Paraguay River system in Del Plata basin, second size among South American drainages, acts as a birds. We analysed degree of mitochondrial nuclear genomic seven species with known subspecies divided by axis. Only one showed genetic...
Certain vocal signals can be difficult or challenging to produce due constraints on mechanics. In the case of birdsong, both body size and beak morphology have been shown constrain spectral temporal song parameters. Therefore, variation within a clade in these morphological traits could exert an important effect evolution diversity. However, given allometric relationship between size, it is not always easy separate effects they may have. Additionally, different habitats impose sources sound...
AbstractBehavioural characters that are learned can show temporal variation resulting from changes introduced in new generations during the learning process. The song of Rufous-collared Sparrow (Zonotrichia capensis) shows significant geographical associated with habitat, delimiting dialects. To study stability or change dialects Sparrows at a microgeographical scale, we compared recordings made Reserva El Destino, north-eastern coastal Buenos Aires Province, Argentina, 1987 and 2000 2010...
The increasing availability of molecular phylogenies has highlighted the issue that genotypic and phenotypic patterns variation are not always congruent, particularly below species level. This led to an ongoing discussion on validity subspecies category use data help revise traditional classifications based data. We compared spatial diversification in genotype phenotype Blue‐black Grosbeak Cyanocompsa cyanoides , a Neotropical songbird with four recognized subspecies. Variation partially...
Some types of plumage color are difficult to characterize spectrophotometrically because the properties reflected light change with viewing geometry (i.e. relative positions source and observer, orientation feather). This is case for noniridescent coloration Swallow Tanager (Tersina viridis), which seems from a human perspective as angle between observer varies. In this study, we measured reflectance different angles illumination and/or observation, used avian visual models evaluate in...
Abstract Whole-genome-level comparisons of sister taxa that vary in phenotype against a background high genomic similarity can be used to identify the regions might underlie their phenotypic differences. In wild birds, this exploratory approach has detected markers associated with plumage coloration, beak and wing morphology, complex behavioral traits like migration. Here, we use two closely related suboscine flycatchers (Empidonax difficilis E. occidentalis) hybrids search for candidate...
Abstract Vocal learning in birds is a complex animal behavior with several parallels to vocal humans. Early experiments the 70s showing that juvenile could learn their species’ normal song presented only through loudspeakers led general notion social interactions are unnecessary for learning. These views were soon challenged, and after decades of research we know different factors influence Here, I discuss recent getting us closer understanding how. Juvenile wild exposed both direct indirect...
The current attrition of biodiversity extends beyond loss species and unique populations to steady a vast genomic diversity that remains largely undescribed. Yet the accelerating development new techniques allows us survey entire genomes ever faster cheaper, obtain robust samples from sources including degraded DNA residual in environment, address conservation efforts innovative ways. Here we review recent studies highlight importance carefully considering where prioritize collection genetic...
Studies of geographic variation in bird song can provide important insights into vocal evolution. An intraspecific approach, focused on a single species with broad distribution, be particularly helpful understanding the diverse selective pressures characteristics songs and singing behavior. Grass Wrens (Cistothorus platensis) are one such species, inhabiting tropical temperate grasslands across Neotropics. We studied Mendoza, Argentina, to determine structure, organization, delivery their...
We report on the capture of an adult male Rufous-tailed Attila (Attila phoenicurus) in Mburucuyá National Park, Corrientes, Argentina. This is first record for this protected area, and also province. Records species are scarce Argentina, where it had been registered previously only Misiones Populations believed to be declining, considered a “threatened species” If confirmed, regular presence perhaps even breeding Park would extend species’ distribution range approximately 200 km southwest,...
Abstract Non‐iridescent, structural coloration in birds originates from the feather's internal nanostructure (the spongy matrix) but melanin pigments and barb's cortex can affect resulting color. Here, we explore how this is combined with other elements differently colored plumage patches within a bird. We investigated association between light reflectance morphology of feathers back belly male swallow tanagers ( Tersina viridis ), which look greenish‐blue white, respectively. Both have peak...
Abstract More than a century ago, Darwin and Wallace started still ongoing debate over which are the predominant forces driving sexual dichromatism (i.e. differences in body coloration between males females): is it selection on to become more attractive, or natural females cryptic? While these not mutually exclusive, degree of has been extensively used as proxy intensity one type (sexual) sexes (males). Here, we evaluated relationship two body-color features that can be under and/or each...
Birds often compete and engage in interspecific agonistic interactions for access to resources such as food breeding territories. Based on the observed outcomes from (i.e., patterns of displacements) dominance hierarchies can be established. Knowing which species outcompete others essential allows researchers make predictions about broader ecological impacts interactions. We constructed an hierarchy twelve avian visited artificial water source arid region coastal Patagonia, Argentina....
Reportamos el primer registro documentado de un Hocó Colorado (Tigrisoma lineatum) depredando individuo Estornino Pinto (Sturnus vulgaris) en la Reserva Ecológica Costanera Sur, Buenos Aires, Argentina.