20 Works

Data from: Standing chromosomal variation in Lake Whitefish species pairs: the role of historical contingency and relevance for speciation

Anne-Marie Dion-Côté, Radka Symonová, Fabien C. Lamaze, Šárka Pelikánová, Petr Ráb & Louis Bernatchez
The role of chromosome changes in speciation remains a debated topic, although demographic conditions associated with divergence should promote their appearance. We tested a potential relationship between chromosome changes and speciation by studying two Lake Whitefish (Coregonus clupeaformis) lineages that recently colonized postglacial lakes following allopatry. A dwarf limnetic species evolved repeatedly from the normal benthic species, becoming reproductively isolated. Lake Whitefish hybrids experience mitotic and meiotic instability, which may result from structurally divergent chromosomes....

Data from: Species-specific patterns of nonapeptide brain gene expression relative to pair-bonding behaviour in grouping and non-grouping cichlids

Constance M. O'Connor, Susan E. Marsh-Rollo, Nadia Aubin-Horth & Sigal Balshine
Comparative studies have revealed that vasopressin-oxytocin pathways are associated with both pair bonding and grouping behaviour. However, the relationship between pair bonding and grouping behaviourremains unclear.In this study,our aim was to identify whether two species that differ in grouping behaviourdisplay a corresponding difference in their pair bonds, and in the underlying vasopressin-oxytocinhormonal pathways. Using two species of cichlid fishes, the highly social Neolamprologuspulcher and the non-social Telmatochromis temporalis, we measuredproximity of pairs during pair bond...

Data from: Distinctive architecture of the chloroplast genome in the chlorodendrophycean green algae Scherffelia dub and Tetraselmis sp. CCMP 881

Monique Turmel, Jean-Charles De Cambiaire, Christian Otis & Claude Lemieux
The Chlorodendrophyceae is a small class of green algae belonging to the core Chlorophyta, an assemblage that also comprises the Pedinophyceae, Trebouxiophyceae, Ulvophyceae and Chlorophyceae. Here we describe for the first time the chloroplast genomes of chlorodendrophycean algae (Scherffelia dubia, 137,161 bp; Tetraselmis sp. CCMP 881, 100,264 bp). Characterized by a very small single-copy (SSC) region devoid of any gene and an unusually large inverted repeat (IR), the quadripartite structures of the Scherffelia and Tetraselmis...

Data from: Energy benefits and emergent space use patterns of an empirically parameterized model of memory-based patch selection

Jerod A. Merkle, Jonathan R. Potts & Daniel Fortin
Many species frequently return to previously visited foraging sites. This bias towards familiar areas suggests that remembering information from past experience is beneficial. Such a memory-based foraging strategy has also been hypothesized to give rise to restricted space use (i.e. a home range). Nonetheless, the benefits of empirically derived memory-based foraging tactics and the extent to which they give rise to restricted space use patterns are still relatively unknown. Using a combination of stochastic agent-based...

Data from: Wind exposure and light exposure, more than elevation-related temperature, limit tree line seedling abundance on three continents

Eliot J. B. McIntire, Frida I. Piper & Alex Fajardo
The transition from seedlings into trees at alpine treelines is a temperature-limited process that ultimately sets the treeline elevation at a global scale. As such, treelines may be key bioassays of global warming effects on species distributions. For global warming to promote upward treeline migration, as predicted, seedlings must be available. We examined, for the first time at a global scale, elevational patterns and drivers of seedling availability at treelines. Working at 10 sites across...

Data from: Estimating fish abundance and biomass from eDNA concentrations: variability among capture methods and environmental conditions

Anaïs Lacoursière-Roussel, Maikel Rosabal-Rodriguez, Louis Bernatchez & Maikel Rosabal
Environmental DNA (eDNA) promises to ease non-invasive quantification of fish biomass or abundance, but its integration within conservation and fisheries management is currently limited by a lack of understanding of the influence of eDNA collection method and environmental conditions on eDNA concentrations in water samples. Water temperature is known to influence the metabolism of fish and consequently could strongly affect eDNA release rate. As water temperature varies in temperate regions (both seasonally and geographically), the...

Data from: Assessing reproductive isolation using a contact zone between parapatric lake-stream stickleback ecotypes

Dieta Hanson, Jean-Sébastien Moore, Eric B. Taylor, Rowan D.H. Barrett, Andrew P. Hendry, J.-S. Moore & R. D. H. Barrett
Ecological speciation occurs when populations evolve reproductive isolation as a result of divergent natural selection. This isolation can be influenced by many potential reproductive barriers, including selection against hybrids, selection against migrants, and assortative mating. How and when these barriers act and interact in nature is understood for relatively few empirical systems. We used a mark-recapture experiment in a contact zone between lake and stream three-spined sticklebacks (Gasterosteus aculeatus, Linnaeus) to evaluate the occurrence of...

Data from: Making sense of the relationships between Ne, Nb and Nc towards defining conservation thresholds in Atlantic salmon (Salmo salar)

Anne-Laure Ferchaud, Charles Perrier, Julien April, Cécilia Hernandez, Mélanie Dionne & Louis Bernatchez
Effective population size over a generation (Ne) or over a reproductive cycle (Nb) and the adult census size (Nc) are important parameters in both conservation and evolutionary biology. Ne provides information regarding the rate of loss of genetic diversity and can be tracked back in time to infer demographic history of populations, whereas Nb may often be more easily quantified than Nc for short-term abundance monitoring. In this study, we propose (1) an empirical context...

Data from: Population genomics reveals structure at the individual, host-tree scale and persistence of genotypic variants of the undomesticated yeast Saccharomyces paradoxus in a natural woodland

Wenjing Xia, Lou Nielly-Thibault, Guillaume Charron, Christian R. Landry, Dahlia Kasimer, James B. Anderson & Linda M. Kohn
Genetic diversity in experimental, domesticated and wild populations of the related yeasts, Saccharomyces cerevisiae and S. paradoxus has been well described at the global scale. We investigated the population genomics of a local population on a small spatial scale to address two main questions. First, is there genomic variation in a S. paradoxus population at a spatial scale spanning centimeters (microsites) to tens of meters? Second, does the distribution of genomic variants persist over time?...

Data from: Cohort variation in individual body mass dissipates with age in large herbivores

Sandra Hamel, Jean-Michel Gaillard, Nigel G. Yoccoz, Steve Albon, Steeve D. Côté, Joseph M. Craine, Marco Festa-Bianchet, Mathieu Garel, Phyllis Lee, Cynthia Moss, Daniel H. Nussey, Fanie Pelletier, Audun Stien & Torkild Tveraa
Environmental conditions experienced during early growth and development markedly shape phenotypic traits. Consequently, individuals of the same cohort may show similar life-history tactics throughout life. Conditions experienced later in life, however, could fine-tune these initial differences, either increasing (cumulative effect) or decreasing (compensatory effect) the magnitude of cohort variation with increasing age. Our novel comparative analysis that quantifies cohort variation in individual body size trajectories shows that initial cohort variation dissipates throughout life, and that...

Data from: Draft genome of the American eel (Anguilla rostrata)

Scott A. Pavey, Martin Laporte, Eric Normandeau, Jérémy Gaudin, Louis Létourneau, Sébastien Boisvert, Jacques Corbeil, Céline Audet & Louis Bernatchez
Freshwater eels (Anguilla sp.) have large economic, cultural, ecological and aesthetic importance worldwide, but they suffered more than 90% decline in global stocks over the past few decades. Proper genetic resources, such as sequenced, assembled and annotated genomes, are essential to help plan sustainable recoveries by identifying physiological, biochemical and genetic mechanisms that caused the declines or that may lead to recoveries. Here, we present the first sequenced genome of the American Eel. This genome...

Data from: Investigating genomic and phenotypic parallelism between piscivorous and planktivorous lake trout (Salvelinus namaycush) ecotypes by means of RADseq and morphometrics analyses

Simon Bernatchez, Martin Laporte, Charles Perrier, Pascal Sirois & Louis Bernatchez
Repeated adaptive ecological diversification has commonly been reported in fish and has often been associated with trophic niche diversity. The main goal of this study was to investigate the extent of parallelism in the genomic and phenotypic divergence between piscivorous and planktivorous lake trout ecotypes from Laurentian Shield lakes, Canada. This was achieved by documenting the extent of morphological differentiation using geometric morphometrics and linear measurements as well as the pattern of genomic divergence by...

Data from: Convergence in organ size but not energy metabolism enzyme activities among wild Lake Whitefish (Coregonus clupeaformis) species pairs

Anne C. Dalziel, Martin Laporte, Clément Rougeux, Helga Guderley & Louis Bernatchez
The repeated evolution of similar phenotypes by similar mechanisms can be indicative of local adaptation, constraints or biases in the evolutionary process. Little is known about the incidence of physiological convergence in natural populations, so here we test whether energy metabolism in ‘dwarf’ and ‘normal’ Lake Whitefish evolves by similar mechanisms. Prior genomic and transcriptomic studies have found that divergence in energy metabolism is key to local adaptation in whitefish species pairs, but that distinct...

Data from: The biogeography of the atlantic salmon (Salmo salar) gut microbiome

Martin S. Llewellyn, Philip McGinnity, Melanie Dionne, Justine Letourneau, Florian Thonier, Gary R. Carvalho, Simon Creer & Nicolas Derome
Although understood in many vertebrate systems, the natural diversity of host-associated microbiota has been little studied in teleosts. For migratory fishes, successful exploitation of multiple habitats may affect and be affected by the composition of the intestinal microbiome. We collected 96 Salmo salar from across the Atlantic encompassing both freshwater and marine phases. Dramatic differences between environmental and gut bacterial communities were observed. Furthermore, community composition was not significantly impacted by geography. Instead life-cycle stage...

Data from: Loss of connectivity among island-dwelling Peary caribou following sea ice decline

Deborah A. Jenkins, Nicolas Lecomte, James A. Schaefer, Steffen M. Olsen, Didier Swingedouw, Steeve D. Côté, Loïc Pellissier & Glenn Yannic
Global warming threatens to reduce population connectivity for terrestrial wildlife through significant and rapid changes to sea ice. Using genetic fingerprinting, we contrasted extant connectivity in island-dwelling Peary caribou in northern Canada with continental-migratory caribou. We next examined if sea-ice contractions in the last decades modulated population connectivity and explored the possible impact of future climate change on long-term connectivity among island caribou. We found a strong correlation between genetic and geodesic distances for both...

Data from: Seascape genomics provides evidence for thermal adaptation and current-mediated population structure in American lobster (Homarus americanus)

Laura M. Benestan, Brady K. Quinn, Halim Maaroufi, Martin Laporte, Fraser K. Clark, Spencer J. Greenwood, Rémy Rochette, Louis Bernatchez & Laura Benestan
Investigating how environmental features shape the genetic structure of populations is crucial for understanding how they are potentially adapted to their habitats, as well as for sound management. In this study, we assessed the relative importance of spatial distribution, ocean currents and sea surface temperature (SST) on patterns of putatively neutral and adaptive genetic variation among American lobster from 19 locations using population differentiation (PD) approaches combined with environmental association (EA) analyses. First, PD approaches...

Data from: Exploiting Poisson additivity to predict fire frequency from maps of fire weather and land cover in boreal forests of Québec, Canada

Jean Marchal, Steven G. Cumming & Eliot J. B. McIntire
Predictive models of fire frequency conditional on weather and land cover are essential to assess how future cover-type distributions and weather conditions may influence fire regimes. We modelled the effects of bottom-up variables (e.g. land cover) and top-down variables (e.g. fire weather) simultaneously with data aggregated or interpolated to spatial and temporal units of 100 km2 and 1yr in the boreal forest of Québec, Canada. For models of human-caused fires, we used road density as...

Data from: Threshold dynamics in plant succession after tree planting in agricultural riparian zones

Bérenger Bourgeois, Anne Vanasse, Eduardo González, Roxane Andersen & Monique Poulin
Trajectories of plant communities can be described by different models of plant succession. While a Clementsian (gradual continuum model) or Gleasonian approach (relay floristics model) has traditionally been used to inform restoration outcomes, alternative succession models developed recently may better represent restoration trajectories. The threshold dynamics succession model, which predicts an abrupt species turnover after an environmental threshold is crossed, has never been used in a restoration context. This model might, however, better describe shifts...

Data from: Genetic stock structure of Anadromous Arctic char in Canada’s Central Arctic: potential implications for the management of Canada’s largest Arctic char commercial fishery

Les N. Harris, Jean-Sébastien Moore, Robert Bajno & Ross F. Tallman
The Arctic Char Salvelinus alpinus is widely considered the most important subsistence fish species in the Canadian Arctic. Throughout the species’ range, commercial fisheries for Arctic Char also exist, the management of which primarily follows river-specific harvest strategies. Such an approach, however, may not be appropriate if the management unit or stock does not accurately reflect a demographically independent population or if mixtures of populations are being harvested. We assayed microsatellite DNA variation among 744...

Data from: The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes

Scott R. J. McCairns, Steve Smith, Minami Sasaki, Louis Bernatchez, Luciano B. Beheregaray & R. J. Scott McCairns
Whilst adaptation and phenotypic plasticity might buffer species against habitat degradation associated with global climate change, few studies making such claims also possess the necessary and sufficient data to support them. Doing so requires demonstration of heritable variation in traits affecting fitness under new environmental conditions. We address this issue using an emerging aquatic system to study adaptation to climate change, the crimson-spotted rainbowfish (Melanotaenia duboulayi), a freshwater species from a region of eastern Australia...

Registration Year

  • 2016

Resource Types

  • Dataset


  • Université Laval
  • McGill University
  • Canadian Forest Service
  • University of New Brunswick
  • Bangor University
  • Université de Sherbrooke
  • The Arctic University of Norway
  • Université du Québec à Chicoutimi
  • Saint Mary's University
  • Institute of Animal Physiology and Genetics