9 Works

Neutral and adaptive loci reveal fine-scale population structure in Eleginops maclovinus from North Patagonia

Cristian B. Canales-Aguirre, Wesley A. Larson, Garret J. McKinney, C. Eliza Claure, J. Dellis Rocha, Santiago G. Ceballos, Maria I. Cádiz, José M. Yáñez & Daniel Gómez-Uchida
Patagonia is an understudied area, especially when it comes to population genomic studies with relevance to fishery management. However, the dynamic and heterogeneous landscape in this area can harbor important but cryptic genetic population structure. Once such information is revealed, it can be integrated into the management of infrequently investigated species. Eleginops maclovinus is a protandrous hermaphrodite species with economic importance for local communities that is currently managed as a single genetic unit. In this...

L’élection présidentielle en Uruguay : défaite du Front large et autonomisation de l’extrême droite (Les Études du CERI, n°245-246)

Damien LARROUQUÉ
Après quinze ans à la tête de l’Uruguay, le Front large (FA), coalition de partis de gauche emmenée par Daniel Martínez, a perdu au second tour de l’élection présidentielle le 25 novembre 2019, face au candidat du Parti national (PN) ou blanco, Luis Lacalle Pou, par 48,8 contre 47,3 % des suffrages et 3,8 % de votes blancs ou nuls. Compte tenu de l’écart minime entre les deux candidats (moins de trente mille voix), la...

Gestos performativos en el documental chileno: Ningún lugar en ninguna parte (2004), El corredor (2004) y El astuto mono Pinochet contra la moneda de los cerdos (2004)

Iván Veas

Influence of the haemosporidian Leucocytozoon spp. over reproductive output in a wild Neotropical passerine, the Thorn-tailed Rayadito Aphrastura spinicauda

Elfego Cuevas, Carolina Orellana-Peñailillo, Esteban Botero-Delgadillo, Pamela Espíndola-Hernández, Rodrigo A. Vásquez & Verónica Quirici
Life-history theory predicts that hosts may adjust the costs of parasites by altering their reproductive effort. Haemosporidian parasites can affect the reproductive output of wild birds in multiple ways. Thorn-tailed Rayaditos Aphrastura spinicauda breeding in Navarino Island, Southern Chile (55°-40° S) experience high prevalence of the haemosporidian Leucocytozoon spp., which opens the possibility of exploring how these parasites may affect reproductive output in a Neotropical bird species. We compared several variables describing reproductive output (laying...

Experimental admixture among geographically disjunct populations of an invasive plant yields a global mosaic of reproductive incompatibility and heterosis

Ramona E. Irimia, José L. Hierro, Soraia Branco, Gastón Sotes, Lohengrin A. Cavieres, Özkan Eren, Christopher J. Lortie, Kristine French, Ragan M. Callaway & Daniel Montesinos
1. Invasive species have the ability to rapidly adapt in the new regions where they are introduced. Classic evolutionary theory predicts that the accumulation of genetic differences over time in allopatric isolation may lead to reproductive incompatibilities resulting in decreases in reproductive success and, eventually, to speciation. However, experimental evidence for this theoretical prediction in the context of invasive species is lacking. We aimed to test for the potential of allopatry to determine reproductive success...

Conservation of Birds in Fragmented Landscapes Requires Protected Areas

Robert Timmers, Marijke Van Kuijk, Pita Verweij, Jaboury Ghazoul, Yann Hautier, William Laurance, Stefan Arriaga-Weiss, Robert Askins, Corrado Battisti, Åke Berg, Gretchen Daily, Cristián Estades, Beatrice Frank, Reiko Kurosawa, Rosamund Pojar, John Woinarski & Merel Soons
For successful conservation of biodiversity, it is vital to know whether protected areas in increasingly fragmented landscapes effectively conserve species. However, how large habitat fragments must be and what level of protection is required to sustain species, remains poorly known. We compiled a global dataset on almost 2000 bird species in 741 forest fragments varying in size and protection status, and show that protection is associated with higher bird occurrence, especially for threatened species. Protection...

Bizarre tail weaponry in a transitional ankylosaur from subantarctic Chile

Sergio Soto-Acuña, Alexander Vargas & Joao F. Botelho
Armoured dinosaurs are well known for their evolution of specialized tail weapons— paired tail spikes in stegosaurs and heavy tail clubs in advanced ankylosaurs1. Armoured dinosaurs from southern Gondwana are rare and enigmatic, but probably include the earliest branches of Ankylosauria2–4. Here we describe a mostly complete, semi-articulated skeleton of a small (approximately 2 m) armoured dinosaur from the late Cretaceous period of Magallanes in southernmost Chile, a region that is biogeographically related to West...

Experimental evolution on heat tolerance and thermal performance curves under contrasting thermal selection in Drosophila subobscura

Andres Mesas, Angélica Jaramillo & Luis Castañeda
Ectotherms can respond to global warming via evolutionary change of their upper thermal limits (CTmax). Thus, the estimation of CTmax and its evolutionary potential is crucial to determine their vulnerability to global warming. However, CTmax estimations depend on the thermal stress intensity, and it is not completely clear whether its evolutionary capacity can be affected. Here, we performed an artificial selection experiment to increase heat tolerance using fast- and slow-ramping selection protocols in Drosophila subobscura....

Combining point counts and autonomous recording units improves avian survey efficacy across elevational gradients on two continents

Anna Drake, Devin R. De Zwaan, Tomás A. Altamirano, Scott Wilson, Kristina Hick, Camila Bravo, José Tomás Ibarra & Kathy Martin
Accurate biodiversity and population monitoring is a requirement for effective conservation decision-making. Survey method bias is therefore a concern, particularly when research programs face logistical and cost limitations. We employed point counts (PCs) and autonomous recording units (ARUs) to survey avian biodiversity within comparable, high elevation, temperate mountain habitats at opposite ends of the Americas: 9 mountains in British Columbia (BC), Canada and 10 in southern Chile. We compared detected species richness against multi-year species...

Registration Year

  • 2021
    9

Resource Types

  • Dataset
    7
  • Data Paper
    1
  • Journal Article
    1

Affiliations

  • University of Chile
    9
  • Pontifical Catholic University of Chile
    2
  • Max Planck Institute for Ornithology
    1
  • Capital Regional District
    1
  • University of Montana
    1
  • Stanford University
    1
  • University of Wollongong
    1
  • Aarhus University
    1
  • Connecticut College
    1
  • National University of Tierra del Fuego
    1