34 Works

BayesW time-to-event analysis posterior outputs and summary statistics

Sven Erik Ojavee & Matthew Robinson
Here, we develop a Bayesian approach (BayesW) that provides probabilistic inference of the genetic architecture of age-at-onset phenotypes in a hybrid-parallel sampling scheme that facilitates Bayesian time-to-event large-scale biobank analyses. We show in extensive simulation work that BayesW achieves a greater number of discoveries, better model performance and improved genomic prediction as compared to other approaches. In the UK Biobank, we find many thousands of common genomic regions underlying the age-at-onset of high blood pressure...

Cephalic biomechanics underpins the evolutionary success of trilobites

Jorge Esteve, Jordi Marcé-Nogué, Francesc Pérez-Peris & Emily Rayfield
Arthropods (i.e. insects, spiders, crustaceans, myriapods and others), are the most successful Phanerozoic animals. The group are characterised by the possession of a segmented body, jointed limbs and a hard cuticle that is episodically moulted. One highly successful, but now extinct, group of arthropods are the trilobites. Trilobites underwent episodic moulting (ecdysis), and most trilobites possess facial sutures, lines of weakness in the cephalon, via which the exuviae is shed and the animal emerges. However,...

Einstellungen zur Geschlechtergleichstellung in der Schweiz, 2000-2017

Christina Bornatici, Jacques-Antoine Gauthier & Jean-Marie Le Goff

Input files of various genomic analyses used to unravel the domestication history of Cannabis

Guangpeng Ren & Luca Fumagalli
Cannabis sativa has long been an important source of fiber extracted from hemp and both medicinal and recreational drugs based on cannabinoid compounds. Here, we investigated its poorly known domestication history using whole-genome resequencing of 110 accessions from worldwide origins. We show that C. sativa was first domesticated in early Neolithic times in East Asia and that all current hemp and drug cultivars diverged from an ancestral gene pool currently represented by feral plants and...

Population abundance data and species range maps

Mathieu Chevalier, Olivier Broennimann & Antoine Guisan
Aim – The abundant-center hypothesis (ACH) predicts a negative relationship between species abundance and the distance to geographic range center. Since its formulation, empirical tests of the ACH have involved different settings (e.g. the distance to the ecological niche or to the geographic range center), but studies found contrasting support for this hypothesis. Here, we evaluate whether these discrepancies might stem from differences regarding the context in which the ACH is tested (geographical or environmental),...

Immune challenges increase network centrality in a queenless ant

Giacomo Alciatore, Line V. Ugelvig, Erik Frank, Jérémie Bidaux, Asaf Gal, Thomas Schmitt, Daniel J.C. Kronauer & Yuko Ulrich
Social animals display a wide range of behavioural defences against infectious diseases, some of which inherently increase social contacts with infectious individuals (e.g., mutual grooming), while others decrease them (e.g., social exclusion). These defences often rely on the detection of infectious individuals, but this can be achieved in several ways that are difficult to differentiate. Here, we combine non-pathogenic immune challenges with automated tracking in colonies of the clonal raider ant to ask whether ants...

Data from: European common frog (Rana temporaria) recolonised Switzerland from multiple glacial refugia in northern Italy via trans- and circum-Alpine routes

Alexandra Jansen Van Rensburg, Mathieu Robin, Barret Phillips & Josh Van Buskirk
The high mountain ranges of western Europe had a profound effect on the biotic recolonisation of Europe from glacial refugia. The Alps present a particularly interesting case because they form an absolute barrier to dispersal for most taxa, obstructing recolonisation from multiple refugia in northern Italy. Here we investigate the effect of the European Alps on the phylogeographic history of the European common frog Rana temporaria. Based on partial cytochrome b and COXI sequences from...

Ant behavioral maturation is mediated by a stochastic transition between two fundamental states

Thomas Richardson, Tomas Kay, Raphael Braunschweig, Opaline A. Journeau, Matthias Ruegg, Sean McGregor, Paolo De Los Rios & Laurent Keller
The remarkable ecological success of social insects is often attributed to their advanced division of labour, which is closely associated with temporal polyethism in which workers transition between different tasks as they age. Young nurses are typically found deep within the nest where they tend to the queen and the brood, whereas older foragers are found near the entrance and outside the nest. However, the individual-level maturation dynamics remain poorly understood because following individuals over...

Data from: National assessments of species vulnerability to climate change strongly depend on selected data sources

Daniel Scherrer, Manuel Esperon-Rodriguez, Linda J. Beaumont, Victor L. Barradas & Antoine Guisan
Aim: Correlative species distribution models (SDMs) are among the most frequently used tools for conservation planning under climate and land-use changes. Conservation-focused climate change studies are often conducted on a national or local level and can use different sources of occurrence records (e.g., local databases, national biodiversity monitoring) collated at different geographic extents. However, little is known about how these restrictions in geographic space (i.e., Wallacean shortfall) can lead to restrictions in environmental space (i.e....

Time-Consistent Control in Non-Linear Models

Steve Ambler & Florian Pelgrin
We show how to use optimal control theory to derive optimal time-consistent Markov-perfect government policies in nonlinear dynamic general equilibrium models, extending the result of Cohen and Michel (1988) for models with quadratic objective functions and linear dynamics. We replace private agents' costates by flexible functions of current states in the government's maximization problem. The functions are verified in equilibrium to an arbitrarily close degree of approximation. They can be found numerically by perturbation or...

Fossil-informed models reveal a Boreotropical origin and divergent evolutionary trajectories in the walnut family (Juglandaceae)

Qiuyue Zhang, Richard Ree, Nicolas Salamin, Yaowu Xing & Daniele Silvestro
Temperate woody plants in the Northern Hemisphere have long been known to exhibit high species richness in East Asia and North America and significantly lower diversity in Europe, but the causes of this pattern remain debated. Here, we quantify the roles of dispersal, niche evolution, and extinction in shaping the geographic diversity of the temperate woody plant family Juglandaceae (walnuts and their relatives). Integrating evidence from molecular, morphological, fossil, and (paleo)environmental data, we find strong...

The tempo of greening in the European Alps: Spatial variations on a common theme

Philippe Choler, Arthur Bayle, Bradley Z. Carlson, Christophe Randin, Gianlucca Filippa & Edoardo Cremonese
The long-term increase of satellite-based proxies of vegetation cover is a well-documented response of seasonally snow-covered ecosystems to climate warming. However, observed greening trends are far from being uniform and substantial uncertainty remains concerning the underlying causes of this spatial variability. Here, we processed surface reflectance of the moderate resolution imaging spectroradiometer (MODIS) to investigate trends and drivers of changes in the annual peak values of the Normalized Difference Vegetation Index (NDVI). Our study focuses...

Photosynthesis from stolen chloroplasts can support sea slug reproductive fitness

Paulo Cartaxana, Felisa Rey, Charlotte LeKieffre, Diana Lopes, Cedric Hubas, Jorge E. Spangenberg, Stéphane Escrig, Bruno Jesus, Gonçalo Calado, Rosário Domingues, Michael Kühl, Ricardo Calado, Anders Meibom & Sónia Cruz
Some sea slugs are able to steal functional chloroplasts (kleptoplasts) from their algal food sources, but the role and relevance of photosynthesis to the animal host remain controversial. While some researchers claim that kleptoplasts are slowly digestible ‘snacks’, others advocate that they enhance the overall fitness of sea slugs much more profoundly. Our analysis show light-dependent incorporation of 13C and 15N in the albumen gland and gonadal follicles of the sea slug Elysia timida, representing...

Species ecology explains the various spatial components of genetic diversity in tropical reef fishes

Giulia Francesca Azzurra Donati, Niklaus Zemp, Stéphanie Manel, Maude Poirier, Thomas Claverie, Franck Ferraton, Théo Gaboriau, Rodney Govinden, Oskar Hagen, Shameel Ibrahim, David Mouillot, Julien Leblond, Pagu Julius, Laure Velez, Irthisham Zareer, Adam Ziyad, Fabien Leprieur, Camille Albouy & Loïc Pellissier
Generating genomic data for 19 tropical reef fish species of the Western Indian Ocean, we investigate how species ecology influences genetic diver- sity patterns from local to regional scales. We distinguish between the α, β and γ components of genetic diversity, which we subsequently link to six ecological traits. We find that the α and γ components of genetic diversity are strongly correlated so that species with a high total regional genetic diversity display systematically...

Italy

Claudia Padovani, Giuliano Bobba, Alice Baroni, Marinella Belluati, Cecilia Biancalana, Mauro Bomba, Alice Fubini, Francesco Marrazzo, Rossella Rega, Christian Ruggiero, Simone Sallusti, Sergio Splendore & Michele  Valente

Groping in the fog: Soaring migrants exhibit wider scatter in flight directions and respond differently to wind under low visibility conditions

Paolo Becciu, Michele Panuccio, Giacomo Dell'Omo & Nir Sapir
Atmospheric conditions are known to affect flight propensity, behaviour during flight, and migration route in birds. Yet, the effects of fog have only rarely been studied although they could disrupt orientation and hamper flight. Fog could limit the visibility of migrating birds such that they might not be able to detect landmarks that guide them during their journey. Soaring migrants modulate their flight speed and direction in relation to the wind vector to optimise the...

Replication material for: Marquis, Lionel (2021). Using Response Times to Enhance the Reliability of Political Knowledge Items: An Application to the 2015 Swiss Post-Election Survey. Survey Research Methods Vol. 15, No. 1, pp. 79-100.

Lionel Marquis

Fine-scale habitat heterogeneity favours the coexistence of supergene-controlled social forms in Formica selysi

Sacha Zahnd, Amaranta Fontcuberta, Mesut Koken, Aline Cardinaux & Michel Chapuisat
Background: Social insects vary widely in social organization, yet the genetical and ecological factors influencing this variation remain poorly known. In particular, whether spatially varying selection influences the maintenance of social polymorphisms in ants has been rarely investigated. To fill this gap, we examined whether fine-scale habitat heterogeneity contributes to the co-existence of alternative forms of social organization within populations. Single-queen colonies (monogyne social form) are generally associated with better colonization abilities, whereas multiple-queen colonies...

Les attitudes envers l’égalité des genres en Suisse, 2000-2017

Christina Bornatici, Jacques-Antoine Gauthier & Jean-Marie Le Goff

Geographic variation in body size and plumage colour according to diet composition in a nocturnal raptor

Andrea Romano, Robin Séchaud & Alexandre Roulin
Predator–prey interactions are amongst the strongest selective forces that promote the evolution of local phenotypes in both predators and prey. However, intraspecific spatial covariation in phenotypic traits between predators and prey has been rarely investigated, especially at a large geographic scale. Here, we studied the covariation between prey composition and some phenotypic traits, such as wing length, bill length and plumage colour, of a widely-distributed nocturnal predator, the western barn owl Tyto alba. By using...

Disentangling the mechanisms linking dispersal and sociality in supergene-mediated ant social forms

Amaranta Fontcuberta, Ornela De Gasperin, Amaury Avril, Sagane Dind & Michel Chapuisat
The coevolution between dispersal and sociality can lead to linked polymorphisms in both traits, which may favour the emergence of supergenes. Supergenes have recently been found to control social organization in several ant lineages. Whether and how these “social supergenes” also control traits related to dispersal is yet unknown. Our goal here was to get a comprehensive view of the dispersal mechanisms associated to supergene-controlled alternative social forms in the ant Formica selysi. We measured...

Quantitative trait locus analysis of parasitoid counteradaptation to symbiont-conferred resistance

Gabriel F. Ulrich, Niklaus Zemp, Christoph Vorburger & Hélène Boulain
Insect hosts and parasitoids are engaged in an intense struggle of antagonistic coevolution. Infection with heritable bacterial endosymbionts can substantially increase the resistance of aphids to parasitoid wasps, which exerts selection on parasitoids to overcome this symbiont-conferred protection (counteradaptation). Experimental evolution in the laboratory has produced counteradapted populations of the parasitoid wasp Lysiphlebus fabarum. These populations can parasitize black bean aphids (Aphis fabae) protected by the bacterial endosymbiont Hamiltonella defensa, which confers high resistance against...

Sperm competition experiment with lake char (Lake Geneva 2017/18)

David Nusbaumer, Laurie Ançay, Laura Garaud, Christian De Guttry & Claus Wedekind
Male and female wild lake char (Salvelinus umbla) were sampled from Lake Geneva in December 2017 and December 2018. Male size and colouration (all samples, N = 34) were compared to milt characteristics. For the 2017 samples, milt characteristics were also determined after sperm activation in diluted ovarian fluid or water only, and the gametes were used in sperm competition trials: Equal numbers of sperm competed for fertilization in the presence or absence of ovarian...

Social insect colonies are more likely to accept unrelated queens when they come with workers

Ornela De Gasperin, Pierre Blacher & Michel Chapuisat
Relatedness underlies the evolution of reproductive altruism, yet eusocial insect colonies occasionally accept unrelated reproductive queens. Why would workers living in colonies with related queens accept unrelated ones, when they do not gain indirect fitness through their reproduction? To understand this seemingly paradox, we investigated whether acceptance of unrelated queens by workers is an incidental phenomenon resulting from failure to recognize non-nestmate queens, or whether it is adaptively favored in contexts where cooperation is preferable...

Data and experiment files from: Payoff-based learning best explains the rate of decline in cooperation across 237 public-goods games

Maxwell Burton-Chellew & Stuart West
What motivates human behaviour in social dilemmas? The results of public goods games are commonly interpreted as showing that humans are altruistically motivated to benefit others. However, there is a competing ‘confused learners’ hypothesis: that individuals start the game either uncertain or mistaken (confused), and then learn from experience how to improve their payoff (payoff-based learning). We: (1) show that these competing hypotheses can be differentiated by how they predict contributions should decline over time;...

Registration Year

  • 2021
    34

Resource Types

  • Dataset
    30
  • Text
    3
  • Book Chapter
    1

Affiliations

  • University of Lausanne
    34
  • Grenoble Alpes University
    3
  • Swiss Centre of Expertise in the Social Sciences
    2
  • University of Milan
    2
  • École Polytechnique Fédérale de Lausanne
    2
  • University of Copenhagen
    2
  • French Research Institute for Exploitation of the Sea
    2
  • Swiss Federal Institute of Technology in Zurich
    2
  • University of Padua
    1
  • South African National Biodiversity Institute
    1