Search results for: Daniel Cadena

Items from 1 to 20 out of 35 results

article

Host phylogeny and elevation predict infection by avian haemosporidians in a diverse New Guinean bird community

Geoffrey C. F. Lau, Alexandra M. Class Freeman, Paulo Pulgarín‐R, Carlos Daniel Cadena, more

Journal of Biogeography > 50 > 1 > 23 - 31

Aim The biotic interactions hypothesis predicts that interactions between species are stronger at lower elevations compared to higher elevations. We tested whether this prediction is met by examining elevational patterns in avian haemosporidian infections in New Guinean birds. Location YUS Conservation Area, Papua New Guinea. Taxon Birds and haemosporidia. Methods We collected blood samples...

article

Population divergence associated with spatial asynchrony in precipitation in Neotropical frogs

Carlos E. Guarnizo, Paola Montoya, Ignacio Quintero, Carlos Daniel Cadena

Journal of Biogeography > 49 > 12 > 2169 - 2180

Aim The role that geography plays in promoting speciation by spatially isolating populations has been studied extensively, but less attention has been devoted to assessing the role of isolation by time mediated by spatial variation in climate as a mechanism promoting population divergence. Gene flow between populations differing in their reproductive schedules might be reduced relative to that between...

article

Change in avian functional fingerprints of a Neotropical montane forest over 100 years as an indicator of ecosystem integrity

Camila Gómez, Elkin A. Tenorio, Carlos Daniel Cadena

Conservation Biology > 35 > 5 > 1552 - 1563

Ecologically relevant traits of organisms in an assemblage determine an ecosystem's functional fingerprint (i.e., the shape, size, and position of multidimensional trait space). Quantifying changes in functional fingerprints can therefore provide information about the effects of diversity loss or gain through time on ecosystem condition and is a promising approach to monitoring ecological integrity...

article

Molecular and morphological differentiation among Torrent Duck (Merganetta armata) populations in the Andes

Natalia Gutiérrez‐Pinto, Kevin G. McCracken, Pablo Tubaro, Cecilia Kopuchian, more

Zoologica Scripta > 48 > 5 > 589 - 604

Birds living in riverine environments may show weak population structure because high dispersal abilities required to track habitat dynamics can result in gene flow over broad spatial scales. Alternatively, the configuration of river networks may result in restricted dispersal within river courses or basins, leading to high genetic structure. Although several bird species are riverine specialists...

article

Home‐range size of an Andean bird: Assessing the role of physical condition

María Isabel Castaño, Carlos Daniel Cadena, Jorge Enrique Avendaño

Biotropica > 51 > 4 > 591 - 599

Because space‐use patterns are a key aspect of the ecology and distribution of species, identifying factors associated with variation in size of territories and home ranges has been central to studies on population ecology. Space use might vary in response to extrinsic factors like habitat quality and to intrinsic factors like physical condition and individual aggressiveness. However, the role of...

article

Migratory birds as vehicles for parasite dispersal? Infection by avian haemosporidians over the year and throughout the range of a long‐distance migrant

Paulo C. Pulgarín‐R, Camila Gómez, Nicholas J. Bayly, Staffan Bensch, more

Journal of Biogeography > 46 > 1 > 83 - 96

Aim The role of migratory birds in the spread of parasites is poorly known, in part because migratory strategies and behaviours potentially affecting transmission are not easy to study. We investigated the dynamics of infection by blood parasites through the annual cycle of a long‐distance Nearctic–Neotropical migratory songbird to examine the role of this species in dispersing parasites between...

article

The VEGFA ‐1154G/A polymorphism is associated with reduced risk of rheumatoid arthritis but not with systemic lupus erythematosus in Mexican women

Julian Ramírez‐Bello, Daniel Cadena‐Sandoval, José Manuel Fragoso, Rosa Elda Barbosa‐Cobos, more

The Journal of Gene Medicine > 20 > 6 > n/a - n/a

Background Levels of circulating vascular endothelial growth factor (VEGF) (a potent endothelial‐cell‐specific angiogenic factor) have been correlated with disease activity in patients with rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE). In addition, several single nucleotide polymorphisms (SNPs), including the VEGFA ‐2578C/A, have been associated with RA in some populations. By...

article

Correction to: Combination Glucose-Lowering Therapy Plans in T2DM: Case-Based Considerations

Lawrence Blonde, Susana Dipp, Daniel Cadena

Advances in Therapy > 2018 > 35 > 7 > 966-966

The article “Combination Glucose-Lowering Therapy Plans in T2DM: Case-Based Considerations”.

article

Combination Glucose-Lowering Therapy Plans in T2DM: Case-Based Considerations

Lawrence Blonde, Susana Dipp, Daniel Cadena

Advances in Therapy > 2018 > 35 > 7 > 939-965

Type 2 diabetes mellitus (T2DM) is a complex disease, and while lifestyle interventions remain the cornerstone of therapy, most patients will also require pharmacotherapy. Current diabetes treatment guidelines and algorithms recommend an individualized approach to setting glycemic goals and selecting treatment. Although a single antihyperglycemic agent may be appropriate as the initial T2DM pharmacotherapy,...

article

Tumor necrosis factor gene polymorphisms are associated with systemic lupus erythematosus susceptibility or lupus nephritis in Mexican patients

Julian Ramírez-Bello, Daniel Cadena-Sandoval, Jorge Flavio Mendoza-Rincón, Rosa Elda Barbosa-Cobos, more

Immunologic Research > 2018 > 66 > 3 > 348-354

The TNF -238G/A (rs361525) and -308G/A (rs1800629) polymorphisms have consistently been associated with systemic lupus erythematosus (SLE) in several populations; however, these findings have not been verified in all populations. Here, we aimed to examine whether the TNF -238G/A, -308G/A, -376G/A (rs1800750), and -1031T/C (rs1799964) polymorphisms confer SLE or lupus nephritis (LN) susceptibility...

article

Assessing seasonal changes in animal diets with stable-isotope analysis of amino acids: a migratory boreal songbird switches diet over its annual cycle

Camila Gómez, Thomas Larsen, Brian Popp, Keith A. Hobson, more

Oecologia > 2018 > 187 > 1 > 1-13

Tools to study seasonal changes in animal diets are needed to address a wide range of ecological questions. This is especially true of migratory animals that experience distinct environments where diets may be substantially different. However, tracking diets of individuals that move vast distances has proven difficult. Compound-specific isotope analysis has emerged as a valuable tool to study diets...

article

Display behaviour, social organization and vocal repertoire of Blue‐backed Manakin Chiroxiphia pareola napensis in northwest Amazonia

Ghislaine Cárdenas‐Posada, Carlos Daniel Cadena, John G. Blake, Bette A. Loiselle

Ibis > 160 > 2 > 269 - 282

Members of the avian family Pipridae (manakins) have served as a model system for studies aimed at understanding cooperation among individuals, traits involved in sexual selection and the evolution of female preferences. These studies rely on a detailed natural history baseline, yet multiple manakin taxa remain unstudied, precluding comparative analyses and assessment of geographical variation. The...

article

Hybridization in brushfinches (Atlapetes, Emberizidae) from the southeast Andes of Colombia: a consequence of habitat disturbance?

Diego Carantón-Ayala, Jorge Enrique Avendaño, Carlos Daniel Cadena

Journal of Ornithology > 2018 > 159 > 3 > 713-722

Hybridization between Atlapetes brushfinches has been scarcely documented across the 28 species of the genus. An unusual Atlapetes was observed and collected in the foothills of the southeast Andes of Colombia. We analysed plumage, morphometrics and mitochondrial and nuclear DNA sequences to test whether this specimen represented a hybrid or an aberrant individual of a local species. We found genetic...

article

Tumor necrosis factor (TNF) and TNFR1 polymorphisms are not risk factors for rheumatoid arthritis in a Mexican population

Daniel Cadena-Sandoval, Isidro Alemán-Ávila, Rosa Elda Barbosa-Cobos, Lizbeth Teresa Becerril-Mendoza, more

Molecular Biology Reports > 2018 > 45 > 3 > 227-232

Tumor necrosis factor (TNF) plays an important role in the pathogenesis of rheumatoid arthritis (RA). Different genetic variants including the TNF −308G/A polymorphism are associated with RA susceptibility. However, these findings have not been replicated in all populations. The aim of this study was to determine whether the TNF −1031T/C (rs1799964), −376G/A (rs1800750), −308G/A (rs1800629) −238G/A...

article

Origin and cross-century dynamics of an avian hybrid zone

Andrea Morales-Rozo, Elkin A. Tenorio, Matthew D. Carling, Carlos Daniel Cadena

BMC Evolutionary Biology > 2017 > 17 > 1 > 1-18

Background Characterizations of the dynamics of hybrid zones in space and time can give insights about traits and processes important in population divergence and speciation. We characterized a hybrid zone between tanagers in the genus Ramphocelus (Aves, Thraupidae) located in southwestern Colombia. We evaluated whether this hybrid zone originated as a result of secondary contact or of primary differentiation,...

article

On the importance of geographic and taxonomic sampling in phylogeography: A reevaluation of diversification and species limits in a Neotropical thrush (Aves, Turdidae)

Jorge Enrique Avendaño, Enrique Arbeláez-Cortés, Carlos Daniel Cadena

Molecular Phylogenetics and Evolution > 2017 > 111 > C > 87-97

Phylogeographic studies seeking to describe biogeographic patterns, infer evolutionary processes, and revise species-level classification should properly characterize the distribution ranges of study species, and thoroughly sample genetic variation across taxa and geography. This is particularly necessary for widely distributed organisms occurring in complex landscapes, such as the Neotropical region...

article

The PTPN22 R263Q polymorphism confers protection against systemic lupus erythematosus and rheumatoid arthritis, while PTPN22 R620W confers susceptibility to Graves’ disease in a Mexican population

Daniela Josabeth López-Cano, Daniel Cadena-Sandoval, Olga Beltrán-Ramírez, Rosa Elda Barbosa-Cobos, more

Inflammation Research > 2017 > 66 > 9 > 775-781

Objective The functional PTPN22 R620W polymorphism (rs2476601) is clearly associated with susceptibility to several autoimmune diseases (ADs). However, the PTPN22 R263Q polymorphism (rs33996649) has been scarcely explored in different ADs. Here we aimed to examine the associations of the PTPN22 R620W and R263Q polymorphisms with susceptibility to or protection against rheumatoid arthritis (RA), systemic...

article

Toxic metals and associated sporulated bacteria on Andean hummingbird feathers

Esteban Góngora, Carlos Daniel Cadena, Jenny Dussán

Environmental Science and Pollution Research > 2016 > 23 > 22 > 22968- 22979

Human activities in the Sabana de Bogotá, Colombia, release toxic metals such as lead (Pb) and chromium (Cr) into the environment polluting the air, water, and soil. Because birds are in contact with these pollutants and their sources, they may serve as bioindicator organisms. We evaluated the use of hummingbird feathers obtained from individuals captured in three sites of the Sabana de Bogotá as...

article

Molecular systematics of the new world screech-owls (Megascops: Aves, Strigidae): biogeographic and taxonomic implications

Sidnei M. Dantas, Jason D. Weckstein, John M. Bates, Niels K. Krabbe, more

Molecular Phylogenetics and Evolution > 2016 > 94 > Part B > 626-634

Megascops screech-owls are endemic to the New World and range from southern Canada to the southern cone of South America. The 22 currently recognized Megascops species occupy a wide range of habitats and elevations, from desert to humid montane forest, and from sea level to the Andean tree line. Species and subspecies diagnoses of Megascops are notoriously difficult due to subtle plumage differences...

article

Phylogeography of the Critically Endangered Brown Spider Monkey (Ateles hybridus): Testing the Riverine Barrier Hypothesis

Andrés Link, Lina María Valencia, Laura Natalia Céspedes, Liz Diana Duque, more

International Journal of Primatology > 2015 > 36 > 3 > 530-547

The high biological diversity of tropical forests has been attributed to various biogeographic mechanisms promoting diversification. Among these, the riverine barrier hypothesis postulates that populations of a species that become isolated on opposite sites of a major river may gradually diverge to form separate lineages. Brown spider monkeys (Ateles hybridus) are Critically Endangered primates are...

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INFONA - science communication portal

Search results for: Daniel Cadena

Host phylogeny and elevation predict infection by avian haemosporidians in a diverse New Guinean bird community

Population divergence associated with spatial asynchrony in precipitation in Neotropical frogs

Change in avian functional fingerprints of a Neotropical montane forest over 100 years as an indicator of ecosystem integrity

Molecular and morphological differentiation among Torrent Duck (Merganetta armata) populations in the Andes

Home‐range size of an Andean bird: Assessing the role of physical condition

Migratory birds as vehicles for parasite dispersal? Infection by avian haemosporidians over the year and throughout the range of a long‐distance migrant

The VEGFA ‐1154G/A polymorphism is associated with reduced risk of rheumatoid arthritis but not with systemic lupus erythematosus in Mexican women

Correction to: Combination Glucose-Lowering Therapy Plans in T2DM: Case-Based Considerations

Combination Glucose-Lowering Therapy Plans in T2DM: Case-Based Considerations

Tumor necrosis factor gene polymorphisms are associated with systemic lupus erythematosus susceptibility or lupus nephritis in Mexican patients

Assessing seasonal changes in animal diets with stable-isotope analysis of amino acids: a migratory boreal songbird switches diet over its annual cycle

Display behaviour, social organization and vocal repertoire of Blue‐backed Manakin Chiroxiphia pareola napensis in northwest Amazonia

Hybridization in brushfinches (Atlapetes, Emberizidae) from the southeast Andes of Colombia: a consequence of habitat disturbance?

Tumor necrosis factor (TNF) and TNFR1 polymorphisms are not risk factors for rheumatoid arthritis in a Mexican population

Origin and cross-century dynamics of an avian hybrid zone

On the importance of geographic and taxonomic sampling in phylogeography: A reevaluation of diversification and species limits in a Neotropical thrush (Aves, Turdidae)

The PTPN22 R263Q polymorphism confers protection against systemic lupus erythematosus and rheumatoid arthritis, while PTPN22 R620W confers susceptibility to Graves’ disease in a Mexican population

Toxic metals and associated sporulated bacteria on Andean hummingbird feathers

Molecular systematics of the new world screech-owls (Megascops: Aves, Strigidae): biogeographic and taxonomic implications

Phylogeography of the Critically Endangered Brown Spider Monkey (Ateles hybridus): Testing the Riverine Barrier Hypothesis

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