69 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)

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...

Data from: Genomic predictions and genome-wide association study of resistance against Piscirickettsia salmonis in coho salmon (Oncorhynchus kisutch) using ddRAD sequencing

Agustin Barría, Kris A. Christensen, Grazyella M. Yoshida, Katharina Correa, Ana Jedlicki, Jean Paul Lhorente, William S. Davidson & José Manuel Yáñez
Piscirickettsia salmonis is one of the main infectious diseases affecting coho salmon (Oncorhynchus kisutch) farming, and current treatments have been ineffective for the control of this disease. Genetic improvement for P. salmonis resistance has been proposed as a feasible alternative for the control of this infectious disease in farmed fish. Genotyping by sequencing (GBS) strategies allow genotyping of hundreds of individuals with thousands of single nucleotide polymorphisms (SNPs), which can be used to perform genome...

Data from: A comprehensive transcriptome of early development in yellowtail kingfish (Seriola lalandi)

Alok Patel, Phillip Dettleff, Eric Hernández, Victor Martinez & E. Hernandez
Seriola lalandi is an ecologically and economically important species that is globally distributed in temperate and subtropical marine waters. The aim of this study was to identify large numbers of genic single nucleotide polymorphisms (SNPs) and differential gene expression (DGE) related to the early development of normal and deformed S. lalandi larvae using high-throughput RNA-seq data. A de novo assembly of reads generated 40 066 genes ranging from 300 bases to 64 799 bases with...

Data from: Differences in endophyte communities of introduced trees depend on the phylogenetic relatedness of the receiving forest

Michael J. Gundale, Juan P. Almeida, Håkan Wallander, David A. Wardle, Paul Kardol, Marie-Charlotte Nilsson Hegethorn, Alex Fajardo, Anibal Pauchard, Duane A. Peltzer, Seppo Ruotsalainen, Bill Mason, Nicholas Rosenstock & Marie-Charlotte Nilsson
Plant species sometimes perform extraordinarily well when introduced to new environments, through achieving higher growth rates, individual biomasses or higher densities in their receiving communities compared to their native range communities. One hypothesis proposed to explain enhanced performance in species’ new environments is that their soil microbial communities may be different and provide greater benefit than microbial communities encountered in species’ native environments. However, detailed descriptions of soil biota associated with species in both their...

Data from: The influence of the arid Andean high plateau on the phylogeography and population genetics of guanaco (Lama guanicoe) in South America

Juan Carlos Marín, Benito A. Gonzalez, Elie Poulin, Ciara S. Casey & Warren E. Johnson
A comprehensive study of the phylogeography and population genetics of the largest wild artiodactyl in the arid and cold-temperate South American environments, the guanaco (Lama guanicoe), was conducted to detail patterns of molecular genetic structure related with phylogeographic history, barriers to gene flow, to describe and contrast the evolutionary history and patterns of gene flow among populations. Analyses of 514 bp of mtDNA sequence and 14 biparentally-inherited microsatellite markers of 314 individuals from 17 localities...

Data from: Variation in fine-scale genetic structure and local dispersal patterns between peripheral populations of a South American passerine bird

Esteban Botero-Delgadillo, Verónica Quirici, Yanina Poblete, Élfego Cuevas, Sylvia Kuhn, Alexander Girg, Kim Teltscher, Elie Poulin, Bart Kempenaers & Rodrigo A. Vasquez
The distribution of suitable habitat influences natal and breeding dispersal at small spatial scales, resulting in strong micro-geographic genetic structure. Although environmental variation can promote inter-population differences in dispersal behavior and local spatial patterns, the effects of distinct ecological conditions on within-species variation in dispersal strategies and in fine-scale genetic structure remain poorly understood. We studied local dispersal and fine-scale genetic structure in the thorn-tailed rayadito (Aphrastura spinicauda), a South American bird that breeds along...

Data from: Evolutionary diversity in tropical tree communities peaks at intermediate precipitation

Danilo M. Neves, Kyle G. Dexter, Timothy R. Baker, Fernanda Coelho De Souza, Ary T. Oliveira-Filho, Luciano P. Queiroz, Haroldo C. Lima, Marcelo F. Simon, Gwilym P. Lewis, Ricardo A. Segovia, Luzmila Arroyo, Carlos Reynel, José L. Marcelo-Peña, Isau Huamantupa-Chuquimaco, Daniel Villarroel, G. Alexander Parada, Aniceto Daza, Reynaldo Linares-Palomino, Leandro V. Ferreira, Rafael P. Salomão, Geovane S. Siqueira, Marcelo T. Nascimento, Claudio N. Fraga & R. Toby Pennington
Global patterns of species and evolutionary diversity in plants are primarily determined by a temperature gradient, but precipitation gradients may be more important within the tropics, where plant species richness is positively associated with the amount of rainfall. The impact of precipitation on the distribution of evolutionary diversity, however, is largely unexplored. Here we detail how evolutionary diversity varies along precipitation gradients by bringing together a comprehensive database on the composition of angiosperm tree communities...

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...

Data from: The oldest, slowest forests in the world? Exceptional biomass and slow carbon dynamics of Fitzroya cupressoides temperate rainforests in southern Chile

Rocio B. Urrutia-Jalabert, Yadvinder Malhi, Antonio Lara & Rocio Urrutia-Jalabert
Old-growth temperate rainforests are, per unit area, the largest and most long-lived stores of carbon in the terrestrial biosphere, but their carbon dynamics have rarely been described. The endangered Fitzroya cupressoides forests of southern South America include stands that are probably the oldest dense forest stands in the world, with long-lived trees and high standing biomass. We assess and compare aboveground biomass, and provide the first estimates of net primary productivity (NPP), carbon allocation and...

Data from: The most effective pollinator principle applies to new invasive pollinators

Rodrigo Medel, Catalina Gonzalez-Browne, Daniela Salazar, Pedro Ferrer & Mildred Ehrenfeld
G.L. Stebbins’ most effective pollinator principle states that when pollinators are not limiting, plants are expected to specialize and adapt to the more abundant and effective pollinator species available. In this study, we quantify the effectiveness of bees, hummingbirds and hawkmoths in a Chilean population of Erythranthe lutea (Phrymaceae), and examine whether flower traits are subject to pollinator-mediated selection by the most effective pollinator species during two consecutive years. Unlike most species in the pollinator...

Data from: An integrative approach to understanding the evolution and diversity of Copiapoa (Cactaceae), a threatened endemic Chilean genus from the Atacama Desert

Isabel Larridon, Helmut E. Walter, Pablo C. Guerrero, Milén Duarte, Mauricio A. Cisternas, Carol Peña Hernández, Kenneth Bauters, Pieter Asselman, Paul Goetghebeur & Marie-Stéphanie Samain
PREMISE OF THE STUDY: Species of the endemic Chilean cactus genus Copiapoa have cylindrical or (sub)globose stems that are solitary or form (large) clusters and typically yellow flowers. Many species are threatened with extinction. Despite being icons of the Atacama Desert and well loved by cactus enthusiasts, the evolution and diversity of Copiapoa has not yet been studied using a molecular approach. METHODS: Sequence data of three plastid DNA markers (rpl32-trnL, trnH-psbA, ycf1) of 39...

Data from: Thorson’s rule, life history evolution and diversification of benthic octopuses (Cephalopoda: Octopodoidea)

Christian M. Ibáñez, Enrico L. Rezende, Roger D. Sepúlveda, Jorge Avaria-Llautureo, Cristián E. Hernández, Javier Sellanes, Elie Poulin & María Cecilia Pardo-Gandarillas
Here we evaluate the so-called Thorson’s rule, which posits that direct-development and larger eggs are favored towards the poles in marine organisms and whose validity been the subject of considerable debate in the literature, combining an expanded phenotypic dataset encompassing 60 species of benthic octopuses with a new molecular phylogeny. Phylogenetic reconstruction shows two clades: clade 1 including species of the families Eledonidae, Megaleledonidae, Bathypolypodidae and Enteroctopodidae, and clade 2 including species of Octopodidae. Egg...

Data from: Unveiling current guanaco distribution in Chile based upon niche structure of phylogeographic lineages: Andean puna to subpolar forests

Benito A. González, Horacio Samaniego, Juan Carlos Marín & Cristián F. Estades
Niche description and differentiation at broad geographic scales have been recent major topics in ecology and evolution. Describing the environmental niche structure of sister taxa with known evolutionary trajectories stands out as a useful exercise in understanding niche requirements. Here we model the environmental niche structure and distribution of the recently resolved phylogeography of guanaco (Lama guanicoe) lineages on the western slope of the southern Andes. Using a maximum entropy framework, field data, and information...

Data from: Coordinated species importation policies are needed to reduce serious invasions globally: the case of alien bumblebees in South America

Marcelo A. Aizen, Cecilia Smith-Ramirez, Carolina L. Morales, Lorena Vieli, Agustín Sáez, Rodrigo M. Barahona-Segovia, Marina P. Arbetman, José Montalva, Lucas A. Garibaldi, David W. Inouye & Lawrence D. Harder
The global trade of species promotes diverse human activities but also facilitates the introduction of potentially invasive species into new environments. As species ignore national boundaries, unilateral national decisions concerning species trade set the stage for transnational species invasion with significant conservation, economic and political consequences. The need for a coordinated approach to species importation policies is demonstrated by the introduction of two bumblebee species into Chile for crop pollination, despite Argentina banning commercial importation...

Data from: Testing the effects of heterozygosity on growth rate plasticity in the seaweed Gracilaria chilensis (Rhodophyta)

Cristobal F. Gallegos Sanchez, Jessica Beltrán, Verónica Flores, Alejandra V. González & Bernabé Santelices
Heterozygosity has been positively associated with fitness and population survival. However, the relationship between heterozygosity and adaptive phenotypic plasticity (i.e., plasticity which results in fitness homeostasis or improvement in changing environments), is unclear and has been poorly explored in seaweeds. In this study, we explored this relationship in the clonal red seaweed, Gracilaria chilensis by conducting three growth rate plasticity experiments under contrasting salinity conditions and by measuring heterozygosity with five microsatellite DNA markers. Firstly,...

Data from: Resolving the Northern Hemisphere source region for the long-distance dispersal event that gave rise to the South American endemic dung moss Tetraplodon fuegianus

Lily Lewis, Elisabeth M. Biersma, Sarah B. Carey, Kent Holsinger, Stuart F. McDaniel, Ricardo Rozzi, Bernard Goffinet & Lily R. Lewis
Premise of the study—American bipolar plant distributions characterize taxa at various taxonomic ranks but are most common in the bryophytes at infraspecific and infrageneric levels. A previous study on the bipolar disjunction in the dung moss genus Tetraplodon found that direct long-distance dispersal from North to South in the Miocene - Pleistocene accounted for the origin of the Southern American endemic Tetraplodon fuegianus, congruent with other molecular studies on bipolar bryophytes. The previous study, however,...

Data from: Ovule bet‐hedging at high elevation in the South American Andes: evidence from a phylogenetically‐controlled multispecies study

Mary T. K. Arroyo, Fernanda Perez, Paola Jara-Arancio, Diego Pacheco, Paula Vidal & María Francisca Flores
1. How animal‐pollinated plants support low and stochastic pollination in the high alpine is a key question in plant ecology. The ovule bet‐hedging hypothesis proposes compensation for stochastic pollination via ovule oversupply ín flowers allowing the benefits of windfall pollination events to be reaped. Under this hypothesis, ovule number is expected to increase from treeline upward on high mountains characterized by steep declines in flower visitation rates and increasingly more variable pollination. 2. Ovule/floret number...

Data from: Agreements between industry and academia on publication rights: a retrospective study of protocols and publications of randomized clinical trials

Benjamin Kasenda, Erik Von Elm, John J. You, Anette Blümle, Yuki Tomonaga, Ramon Saccilotto, Alain Amstutz, Theresa Bengough, Joerg J. Meerpohl, Mihaela Stegert, Kelechi K. Olu, Kari A. O. Tikkinen, Ignacio Neumann, Alonso Carrasco-Labra, Markus Faulhaber, Sohail M. Mulla, Dominik Mertz, Elie A. Akl, Dirk Bassler, Jason W. Busse, Ignacio Ferreira-González, Francois Lamontagne, Alain Nordmann, Viktoria Gloy, Heike Raatz … & Matthias Briel
Background: Little is known about publication agreements between industry and academic investigators in trial protocols and the consistency of these agreements with corresponding statements in publications. We aimed to investigate (i) the existence and types of publication agreements in trial protocols, (ii) the completeness and consistency of the reporting of these agreements in subsequent publications, and (iii) the frequency of co-authorship by industry employees. Methods and Findings: We used a retrospective cohort of randomized clinical...

Data from: Extra-pair paternity in two populations of the socially monogamous Thorn-tailed Rayadito Aphrastura spinicauda (Passeriformes: Furnariidae)

Esteban Botero-Delgadillo, Verónica Quirici, Yanina Poblete, Silvina Ippi, Bart Kempenaers & Rodrigo Vasquez
Studies on extra-pair paternity (EPP) are key to understanding the ecological and evolutionary drivers of variation in avian mating strategies, but information is currently lacking for most tropical and sub-tropical taxa. We describe the occurrence of EPP in two populations of a South American socially monogamous bird, the Thorn-tailed Rayadito, based on data from 266 broods and 895 offspring that were sampled during six breeding seasons in north-central and southern Chile. In the northern population,...

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...

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),...

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  • University of Chile
  • Max Planck Institute for Ornithology
  • University Austral de Chile
  • Pontifical Catholic University of Chile
  • University of Concepción
  • Aarhus University
  • Andrés Bello University
  • Catholic University of the North
  • National University of Comahue
  • University of Montana