266 Works

Data from: Putatively adaptive genetic variation in the giant California sea cucumber (Parastichopus californicus) as revealed by environmental association analysis of restriction‐site associated DNA sequencing data

Amanda Xuereb, Christopher M. Kimber, Janelle M.R. Curtis, Louis Bernatchez, Marie-Josée Fortin & Janelle M. R. Curtis
Understanding the spatial scale of local adaptation and the factors associated with adaptive diversity are important objectives for ecology and evolutionary biology, and have significant implications for effective conservation and management of wild populations and natural resources. In this study, we used an environmental association analysis (EAA) to identify important bioclimatic variables correlated with putatively adaptive genetic variation in a benthic marine invertebrate – the giant California sea cucumber (Parastichopus californicus) – spanning coastal British...

Data from: A 12-week exercise program for pregnant women with obesity to improve physical activity levels: an open randomised preliminary study

Michèle Bisson, Natalie Alméras, Sébastien S. Dufresne, Julie Robitaille, Caroline Rhéaume, Emmanuel Bujold, Jérôme Frenette, Angelo Tremblay & Isabelle Marc
Objective: To evaluate whether a 12-week supervised exercise program promotes an active lifestyle throughout pregnancy in pregnant women with obesity. Methods: In this preliminary randomised trial, pregnant women (body mass index ≥ 30 kg/m2) were allocated to either standard care or supervised training, from 15 to 27 weeks of gestation. Physical activity was measured by accelerometry at 14, 28 and 36 weeks, while fitness (oxygen consumption (VO2) at the anaerobic threshold), nutrition (caloric intake and...

Data from: The availability of research data declines rapidly with article age

Timothy H. Vines, Arianne Y. K. Albert, Rose L. Andrew, Florence Débarre, Dan G. Bock, Michelle T. Franklin, Kimberly J. Gilbert, Jean-Sébastien Moore, Sébastien Renaut & Diana J. Rennison
Policies ensuring that research data are available on public archives are increasingly being implemented at the government, funding agency, and journal level. These policies are predicated on the idea that authors are poor stewards of their data, particularly over the long term, and indeed many studies have found that authors are often unable or unwilling to share their data. However, there are no systematic estimates of how the availability of research data changes with 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: Predator-mediated negative effects of overabundant snow geese on arctic-nesting shorebirds

Jean-François Lamarre, Pierre Legagneux, Gilles Gauthier, Eric T. Reed & Joël Bêty
Overabundant species can strongly impact ecosystem functioning through trophic cascades. The strong increase in several arctic geese populations, primarily due to changes in agricultural practices in temperate regions, can have severe direct impacts on tundra ecosystems through vegetation degradation. However, predator-mediated negative effects of goose overabundance on other tundra species can also be significant but are poorly understood. We tested the hypothesis that goose abundance negatively affects arctic-nesting shorebirds by increasing nest predation pressure. We...

Data from: Genomic patterns of diversity and divergence of two introduced salmonid species in Patagonia, South America

Shawn R. Narum, Pablo Gallardo, Cristian Correa, Amanda Matala, Daniel Hasselman, Ben J.G. Sutherland, Louis Bernatchez & Ben J. G. Sutherland
Invasive species have become widespread in aquatic environments throughout the world, yet there are few studies that have examined genomic variation of multiple introduced species in newly colonized environments. In this study, we contrast genomic variation in two salmonid species (anadromous Chinook Salmon, Oncorhynchus tshawytscha, 11,579 SNPs and resident Brook Charr Salvelinus fontinalis, 13,522 SNPs) with differing invasion success after introduction to new environments in South America relative to populations from their native range in...

Data from: Chromosomal fusion and life history-associated genomic variation contribute to within-river local adaptation of Atlantic salmon

Kyle Wellband, Claire Mérot, Tommi Linnansaari, J. A. K. Elliott, R. Allen Curry & Louis Bernatchez
Chromosomal inversions have been implicated in facilitating adaptation in the face of high levels of gene flow, but whether chromosomal fusions also have similar potential remains poorly understood. Atlantic salmon are usually characterized by population structure at multiple spatial scales; however, this is not the case for tributaries of the Miramichi River in North America. To resolve genetic relationships between populations in this system and the potential for known chromosomal fusions to contribute to adaptation...

Data from: Linking genetic and ecological differentiation in an ungulate with a circumpolar distribution

Glenn Yannic, Joaquín Ortego, Loïc Pellissier, Nicolas Lecomte, Louis Bernatchez & Steeve D. Côté
Genetic differentiation among populations may arise from the disruption of gene flow due to local adaptation to distinct environments and/or neutral accumulation of mutations and genetic drift resulted from geographical isolation. Quantifying the role of these processes in determining the genetic structure of natural populations remains challenging. Here, we analyze the relative contribution of isolation-by-resistance (IBR), isolation-by-environment (IBE), genetic drift and historical isolation in allopatry during Pleistocene glacial cycles on shaping patterns of genetic differentiation...

Data from: Reduced fitness of Atlantic salmon released in the wild after one generation of captive-breeding

Emmanuel Milot, Charles Perrier, Lucie Papillon, Julian J. Dodson & Louis Bernatchez
Salmonids rank among the most socio-economically valuable fishes and the most targeted species by stocking with hatchery-reared individuals. Here, we used molecular parentage analysis to assess the reproductive success of wild- and hatchery- born Atlantic salmon over three consecutive years in a small river in Québec. Yearly restocking in this river follows a single generation of captive breeding. Among the adults returning to the river to spawn, between 11% and 41% each year were born...

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: Patterns of colonization and spread in the fungal spruce pathogen Onnia tomentosa

Hugo Germain, Marie-Josée Bergeron, Louis Bernier, Gaston Laflamme & Richard C Hamelin
The basidiomycetous fungus Onnia tomentosa is one of the most widespread root rot pathogens in North America. Although the disease is more severe on spruce and pine trees, this pathogen can infect several coniferous species. In order to study the population structure of O. tomentosa, we harvested 180 basidiocarps in a 45-year-old white spruce plantation in western Quebec in autumn 1997, and extracted DNA directly from individual basidiocarps. Using a combination of spatial coordinates and...

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: Regional divergence and mosaic spatial distribution of two closely related damselfly species (Enallagma hageni and Enallagma ebrium)

Audrey Bourret, Mark A. McPeek & Julie Turgeon
North American Enallagma damselflies radiated during the Pleistocene, and species differ mainly by reproductive structures. Although morphologically very different, Enallagma hageni and Enallagma ebrium are genetically very similar. Partitioning of genetic variation (AFLP), isolation by distance and clustering analyses indicate that these morphospecies are locally differentiated genetically. Spatial analyses show that they are rarely sympatric at local sites, and their distributions form a mosaic of patches where one is clearly dominant over hundreds of square...

Data from: Plasticity and heritability of morphological variation within and between parapatric stickleback demes

R. J. Scott McCairns & Louis Bernatchez
The threespine stickleback (Gasterosteus aculeatus) has emerged as an important model organism in evolutionary ecology, largely due to the repeated, parallel evolution of divergent morphotypes found in populations having colonized freshwater habitats. However, morphological divergence following colonization is not a universal phenomenon. We explore this in a large-scale estuarine ecosystem inhabited by two parapatric stickleback demes, each physiologically adapted to divergent osmoregulatory environments (fresh vs. saline waters). Using geometric morphometric analyses of wild-caught individuals, we...

Data from: Tracking the progression of speciation: variable patterns of introgression across the genome provide insights on the species delimitation between progenitor-derivative spruces (Picea mariana × P. rubens)

Guillaume De Lafontaine, Julien Prunier, Sébastien Gérardi & Jean Bousquet
The genic species concept implies that while most of the genome can be exchanged somewhat freely between species through introgression, some genomic regions remain impermeable to interspecific gene flow. Hence, interspecific differences can be maintained despite ongoing gene exchange within contact zones. This study assessed the heterogeneous patterns of introgression at gene loci across the hybrid zone of an incipient progenitor–derivative species pair, Picea mariana (black spruce) and Picea rubens (red spruce). The spruce taxa...

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: Groups of related belugas (Delphinapterus leucas) travel together during their seasonal migrations in and around Hudson Bay

Gabriel J. Colbeck, Pierre Duchesne, Lianne D. Postma, Véronique Lesage, Mike O. Hammill & Julie Turgeon
Social structure involving long-term associations with relatives should facilitate the learning of complex behaviours such as long-distance migration. In and around Hudson Bay (Canada), three stocks of beluga whales form a panmictic unit, but have different migratory behaviours associated with different summering areas. We analysed genetic variation at 13 microsatellite loci among 1524 belugas, to test hypotheses about social structure in belugas. We found significant proportions of mother–offspring pairs throughout the migratory cycle, but average...

Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate

Alexandre Truchon-Savard, Melanie Jean & Serge Payette
1. Snowpatches are disjunct arctic ecosystems scattered across the Subarctic, particularly on wind-protected lee slopes, where a thick snow cover accumulates during the winter. These snow-rich treeless ecosystems are affected by delayed snowmelt, causing shorter growing seasons. Snow-tolerant plants occupy the center of subarctic snowpatches whereas black spruce trees grow at the margins. Snowpatches have shown sporadic expansion and shrinkage phases from tree establishment and mortality linked to climatic trends. Field surveys in the Subarctic...

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: Stocking impacts the expression of candidate genes and physiological condition in introgressed brook charr (Salvelinus fontinalis) populations

Fabien C. Lamaze, Dany Garant & Louis Bernatchez
Translocation of plants and animal populations between environments is one of the major forms of anthropogenic perturbation experienced by pristine populations, and consequently, human mediated hybridization by stocking practices between wild and exogenous conspecifics is of increasing concern. In this study, we compared the expression of seven candidate genes involved in multifactorial traits and regulatory pathways for growth as a function of level of introgressive hybridization between wild and domestic brook charr to test the...

Data from: Macrophage migration inhibitory factor is involved in ectopic endometrial tissue growth and peritoneal-endometrial tissue interaction in vivo: a plausible link to endometriosis development

Halima Rakhila, Madeleine Lemyre, Karine Girard, Ali Akoum & Mathieu Leboeuf
Pelvic inflammation is a hallmark of endometriosis pathogenesis and a major cause of the disease's symptoms. Abnormal immune and inflammatory changes may not only contribute to endometriosis-major symptoms, but also contribute to ectopic endometrial tissue growth and endometriosis development. A major pro-inflammatory factors found elevated in peritoneal fluid of women with endometriosis and to be overexpressed in peritoneal fluid macrophages and active, highly vascularized and early stage endometriotic lesions, macrophage migration inhibitory factor (MIF) appeared...

Data from: Reproductive isolation in a nascent species pair is associated with aneuploidy in hybrid offspring

Anne-Marie Dion-Côté, Radka Symonová, Petr Ráb, Louis Bernatchez, P. Rab & R. Symonova
Speciation may occur when the genomes of two populations accumulate genetic incompatibilities and/or chromosomal rearrangements that prevent inter-breeding in nature. Chromosome stability is critical for survival and faithful transmission of the genome, and hybridization can compromise this. However, the role of chromosomal stability on hybrid incompatibilities has rarely been tested in recently diverged populations. Here, we test for chromosomal instability in hybrids between nascent species, the ‘dwarf’ and ‘normal’ lake whitefish (Coregonus clupeaformis). We examined...

Data from: Turning down the heat: vegetation feedbacks limit fire regime responses to global warming

Jean Marchal, Steven G. Cumming & Eliot J. B. McIntire
Climate change is projected to dramatically increase boreal wildfire activity, with broad ecological and socio-economic consequences. As global temperatures rise, periods with elevated fire weather are expected to increase in frequency and duration, which would be expected to increase the number and size of fires. Statistical forecasts or simulations of future fire activity often account for direct climatic effects only, neglecting other controls of importance, such as biotic feedbacks. This could result in overestimating the...

Data from: Comparing pool‐seq, rapture, and GBS genotyping for inferring weak population structure: the American lobster (Homarus americanus) as a case study

Yann Dorant, Laura Benestan, Quentin Rougemont, Eric Normandeau, Brian Boyle, Rémy Rochette & Louis Bernatchez
Unraveling genetic population structure is challenging in species potentially characterized by large population size and high dispersal rates, often resulting in weak genetic differentiation. Genotyping a large number of samples can improve the detection of subtle genetic structure, but this may substantially increase sequencing cost and downstream bioinformatics computational time. To overcome this challenge, alternative, cost‐effective sequencing approaches, namely Pool‐seq and Rapture, have been developed. We empirically measured the power of resolution and congruence of...

Data from: A new method for studying population genetics of cyst nematodes based on Pool-Seq and genome-wide allele frequency analysis

Benjamin Mimee, Marc-Olivier Duceppe, Pierre-Yves Véronneau, Joël Lafond-Lapalme, Martine Jean, François Belzile & Guy Bélair
Cyst nematodes are important agricultural pests responsible for billions of dollars of losses each year. Plant resistance is the most effective management tool, but it requires a close monitoring of population genetics. Current technologies for pathotyping and genotyping cyst nematodes are time-consuming, expensive and imprecise. In this study, we capitalized on the reproduction mode of cyst nematodes to develop a simple population genetic analysis pipeline based on genotyping-by-sequencing and Pool-Seq. This method yielded thousands of...

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  • Université Laval
  • Université de Sherbrooke
  • University of British Columbia
  • Fisheries and Oceans Canada
  • Université du Québec à Rimouski
  • University of Alberta
  • Canadian Forest Service
  • Ministère des Forêts, de la Faune et des Parcs
  • Aarhus University
  • University of Alaska Fairbanks