17 Works

Geographic variation in the matching between call characteristics and tympanic sensitivity in the Weeping lizard

Antonieta Labra, Claudio Reyes-Olivares, Felipe N. Moreno-Gómez, Nelson A. Velásquez, Mario Penna, Paul H. Delano & Peter M. Narins
Effective communication requires a match among signal characteristics, environmental conditions, and receptor tuning and decoding. The degree of matching, however, can vary, among others due to different selective pressures affecting the communication components. For evolutionary novelties, strong selective pressures are likely to act upon the signal and receptor to promote a tight match among them. We test this prediction by exploring the coupling between the acoustic signals and auditory sensitivity in Liolaemus chiliensis, the Weeping...

Maternally-transferred thyroid hormones and life-history variation in birds

Bin-Yan Hsu Hsu, Veli-Matti Pakanen, Winnie Boner, Blandine Doligez, Tapio Eeva, Ton Groothuis, Erkki Korpimäki, Toni Laaksonen, Asmoro Lelono, Pat Monaghan, Tom Sarraude, Robert Thomson, Jere Tolvanen, Barbara Tschirren, Rodrigo Vásquez & Suvi Ruuskanen
1. In vertebrates, thyroid hormones (THs) play an important role in the regulation of growth, development, metabolism, photoperiodic responses and migration. Maternally transferred THs are important for normal early-phase embryonic development when embryos are not able to produce endogenous THs. Previous studies have shown that variation in maternal THs within the physiological range can influence offspring phenotype. 2. Given the essential functions of maternal THs in development and metabolism, THs may be a mediator of...

Large flowers can be short-lived: Insights from a high Andean cactus

Marcela Cuartas-Domínguez, Valeria Robles & Mary T. K. Arroyo
Long-lived and large flowers signify high floral maintenance costs. Species of arid/semiarid climates with large flowers are expected to have short flower lifespans and pollination-induced flower longevity in order to curb high floral water and other maintenance costs. We explored the context-dependent large flower/short flower longevity hypothesis in Eriosyce curvispina (Cactaceae), a large-flowered species of the semi-arid central Chilean Andes. We determined breeding system, flower visitation rates, and open-pollination fruit set and quantified floral water...

Female extra-pair behavior is not associated with reduced paternal care in Thorn-tailed Rayadito

Yanina Poblete, Esteban Botero-Delgadillo, Pamela Espíndola-Hernández, Gabriela Südel & Rodrigo Vasquez
Extra-pair behavior is present in 76% of socially monogamous bird species with biparental care. This behavior may produce costs to females related to a reduction in paternal care. We estimated the percentage of extra-pair offspring and quantified paternal care in 44 nests of Thorn-tailed Rayadito (Aphrastura spinicauda) to assess whether males reduce their parental care when females obtain extra-pair fertilizations. We used data from a sub-Antarctic population of Rayadito located on Navarino Island (55°4′S, 67°40′W),...

Data from: Evidence of low within-pair genetic relatedness in a relict population of Thorn-tailed Rayadito despite long-term isolation

Esteban Botero-Delgadillo, Verónica Quirici, Silvina Ippi, Rodrigo Vásquez & Bart Kempenaers
Investigating whether mating patterns are biased in relation to kinship in isolated populations can provide a better understanding of the occurrence of inbreeding avoidance mechanisms in wild populations. Here we report on the genetic relatedness (r) among breeding pairs in a relict population of Thorn-tailed Rayadito (Aphrastura spinicauda) in north-central Chile that has experienced a long-term history of isolation. We used simulations based on eight years of data to assess whether mating is random with...

Le bilan en demi-teinte du second mandat de Michelle Bachelet (Les Études du CERI, n° 233-234)

Antoine Faure & Antoine Maillet
Une fois encore, Michelle Bachelet a cédé l’écharpe présidentielle à Sebastián Piñera. Elle a conclu son second mandat avec une approbation de 23 % selon l’enquête d’opinion de référence (CEP). Huit ans auparavant, à la fin de son premier mandat, la même enquête lui attribuait 78 % d’opinions favorables. Les sondages ne sont assurément pas le seul indicateur à considérer pour tirer le bilan d’un mandat présidentiel, mais dans ce cas précis, l’inversion mérite réflexion....

Élections au Paraguay : victoire en demi-teinte pour le parti colorado et opposition en embuscade (Les Études du CERI, n° 239-240)

Damien Larrouqué
Les élections générales paraguayennes se sont tenues le 22 avril 2018. Elles ont mobilisé 61 % des électeurs inscrits contre 68 % en 2013. De l’avis de nombreux observateurs, la campagne présidentielle a été apathique et n’a guère suscité l’enthousiasme des citoyens, à l’inverse de celle qui, il y a tout juste dix ans, avait insufflé une « nouvelle équation démocratique » en portant l’ancien évêque Fernando Lugo au « Palais des López », tel...

Employment protection and capital-labor ratios (LIEPP Working Paper, n°33)

Alexandre Janiak & Etienne Wasmer
Employment protection (EPL) has a well know negative impact on labor flows as well as an ambiguous but often negative effect on employment. In contrast, its impact on capital accumulation and capital-labor ratio is less well understood. The available empirical evidence suggests a non-monotonic relation between capital-labor ratios and EPL: positive at very low levels of EPL, and the negative. We explore the theorical effects of EPL on physical capital in a model of a...

Taxonomy based on limited genomic markers may underestimates species diversity of rockhopper penguins and threaten their conservation

María José Frugone, Theresa Cole, María Eugenia López, Gemma Clucas, Pável Matos-Maraví, Nicolás Lois, Pierre Pistorius, Francesco Bonadonna, Phil Trathan, Andrea Polanowski, Barbara Wienecke, Andrea Raya-Rey, Klemens Pütz, Antje Steinfurth, Ke Bi, Cynthia Wang-Claypool, Rauri C. K. Bowie, Jonathan Waters, Elie Poulin & Juliana Vianna
Delimiting recently diverged species is challenging. During speciation, genetic differentiation may be distributed unevenly across the genome, as different genomic regions can be subject to different selective pressures and evolutionary histories. Reliance on limited numbers of genetic markers that may be underpowered can make species delimitation even more challenging, potentially resulting in taxonomic inconsistencies. Rockhopper penguins of the genus Eudyptes comprise three broadly recognized taxa: northern (E. moseleyi), southern (E. chrysocome), and eastern rockhopper (E....

Nizolke zugu Dios ñi Nütxam pu Chilemapuche ñi zugun mew : Kritische digitale Re-Edition der Edition Araucana der \"Kurze Biblische Geschichte für die unteren Schuljahre\" in Deutsch, Spanisch und Mapuzugun

Alejandra Natalia Araya Espinoza , Romy Susanne Köhler, Miriam Lay Brander & Andrea Salazar Vega
Trilinguale Re-Edition

Hotspots within a hotspot: Evolutionary measures unveil interesting biogeogeographic patterns for the conservation of the coastal forest in Chile

Rosa Scherson & Daniela Mardones
Aim: Given the continuous loss of biodiversity, there is an urgent need to study its patterns to generate conservation measures. Complementing the traditional patterns with indices that incorporate evolutionary aspects such as phylogenetic diversity or phylogenetic endemism (PD and PE) allows us to infer possible historical processes that could explain the conformation of current biodiversity. Coastal forests in Chile are part of a biodiversity hotspot of high endemism that is under threat. In this study,...

The European continental crust through detrital zircons from modern rivers: biasing effects in the detrital zircon record

Paula Castillo , Heinrich Bahlburg , Rodrigo Fernández , Mark Fanning & Jasper Berndt
We present U-Pb, Lu-Hf, and O isotopic data, as well as size-shape data for approximately 3700 detrital zircons from 15 European rivers. In combination with geomorphological information for each river basin (area, drainage length, and hypsometric curves), we evaluate the representativeness and biases affecting such datasets. The new data allow us to demonstrate that the detrital zircon record from major rivers represents all relevant geological events in Europe at the continental scale, with detrital zircon...

Un segundo mandato a medias tintas: balance del gobierno de Michelle Bachelet (2014-2018) (Les Études du CERI, n°233-234)

Antoine Faure & Antoine Maillet
Otra vez, Michelle Bachelet le otorgará la banda presidencial a Sebastián Piñera. Termina su segundo mandato con un 23% de aprobación, según la encuesta de opinión de referencia (CEP). Ocho años antes, al fin de su primer mandato (2009), la misma encuesta le otorgaba 78% de opiniones favorables. Sin duda, estas encuestas no son el único indicador a considerar para hacer el balance de un mandato presidencial, pero en este preciso caso, la profunda diferencia...

Development of a fluid treatment strategy to enable combined raw material and freshwater recovery from geothermal fluids

Valentin Goldberg , Daniel Winter , Fabian Nitschke , Diego Morata , Joachim Koschikowski & Thomas Kohl
The energy transition and the associated need for non-energy, mineral raw materials have prompted the German government to expand research and development activities along the entire value chain. It is well known that the highly mineralized thermal waters that circulate during the extraction of geothermal energy have, in some cases, significant enrichments of economically strategic elements such as lithium, rubidium, antimony or magnesium. The extraction of mineral resources from thermal waters is still challenging in...

1887-2017: Ciento treinta años de bipartidismo asimétrico en Paraguay (Les Études du CERI, n° 233-234)

Damien Larrouqué
Ubicado en el “cruce de los confines”, Paraguay es un país mal conocido y es poco estudiado. Independiente desde 1811, el país estuvo marcado por un desarrollo proto-industrial autocentrado durante los dos primeros tercios del siglo XIX. Exacerbando disputas territoriales más antiguas, esta política proteccionista atrajo hostilidades desde países vecinos, particularmente desde Brasil y Argentina. A la salida de la guerra de la Triple Alianza (1864- 1870), Paraguay quedó devastado en los planos económico, político...

1887-2017 : cent trente ans de bipartisme asymétrique au Paraguay (Les Études du CERI, n° 233-234)

Damien Larrouqué
Situé au « carrefour des confins », le Paraguay est mal connu et demeure peu étudié. Indépendant depuis 1811, il a été marqué par un développement proto-industriel autocentré durant les deux premiers tiers du xixe siècle. Exacerbant des disputes territoriales plus anciennes, cette politique protectionniste lui a attiré l’hostilité des pays voisins, notamment du Brésil et de l’Argentine. De la guerre de la Triple Alliance (1864-1870), le Paraguay est sorti anéanti sur le plan économique,...

L’Organisation des Etats américains (1948-2018) : crise organisationnelle ou fragmentation du multilatéralisme régional ? (Les Études du CERI, n° 239-240)

Kevin Parthenay & Damien Larrouqué
Institutionnalisant un système interaméricain de coopération, l’Organisation des Etats américains (OEA) a vu le jour en 1948, à l’occasion de la neuvième Conférence internationale des Etats américains qui a réuni une vingtaine de pays à Bogota. Sa création est venue parachever plusieurs initiatives de coopération continentale qui se sont succédé depuis l’Union internationale des républiques américaines de 1890. L’OEA a par ailleurs été fondée dans un contexte de prolifération des arènes multilatérales régionales où l’on...

Registration Year

  • 2022
    17

Resource Types

  • Dataset
    7
  • Journal Article
    6
  • Text
    2
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    1
  • Other
    1

Affiliations

  • University of Chile
    17
  • Max Planck Institute for Ornithology
    2
  • Finis Terrae University
    2
  • University of Cape Town
    2
  • University of Buenos Aires
    1
  • Catholic University of Eichstätt-Ingolstadt
    1
  • University of Münster
    1
  • University of Glasgow
    1
  • University of Groningen
    1
  • Australian National University
    1