14 Works

Coping with the worst of both worlds: phenotypic adjustments for cold acclimatization benefit northward migration and arrival in the cold in an Arctic breeding songbird

Audrey Le Pogam, Ryan S. O'Connor, Oliver P. Love, Magali Petit, Lyette Régimbald & François Vézina
Cold acclimatization (phenotypic adjustments to cope with cold conditions) is an imperative requirement for birds living at high latitudes during the cold depths of winter. Despite the significant remodelling of key phenotypic traits and energetic costs associated with elevating cold endurance, winter cold acclimatization can also provide further carryover benefits to subsequent stages in species wintering, migrating and breeding in cold environments (e.g., the Arctic). We tested this beneficial carryover hypothesis using outdoor captive Arctic-breeding...

Muscle fiber size, myonuclear domain, and fat mass phenotypes in pre-migratory snow buntings

François Vézina, Ryan O'Connor, Audrey Le Pogam, Aliyah De Jesus, Oliver Love & Ana Jimenez
In long-distance migrants, preparation for migration is typically associated with increases in fat and body mass, and with an enlargement of pectoralis muscle mass that likely improves flight performance. Although changes in muscle mass or size have been well described in migratory birds, potential changes in muscle ultrastructure during this transition still deserves scrutiny. Using outdoor captive snow buntings (Plectrophenax nivalis n = 15) measured during their transition into a spring migratory phenotype as a...

RADseq data for Atlantic Halibut in the Northwest Atlantic

Tony Kess, Anthony Einfeldt, Brendan Wringe, Sarah Lehnert, Kara Layton, Meghan McBride, Dominique Robert, Jonathan Fisher, Arnault Le Bris, Cornelia Den Heyer, Nancy Shackell, Daniel Ruzzante, Paul Bentzen & Ian Bradbury
Characterizing the nature of genetic differentiation among individuals and populations and its distribution across the genome is increasingly important to inform both conservation and management of exploited species. Atlantic Halibut (Hippoglossus hippoglossus) is an ecologically and commercially important fish species, yet knowledge of population structure and genomic diversity in this species remains lacking. Here, we use restriction-site associated DNA sequencing and a chromosome-level genome assembly to identify over 86,000 single nucleotide polymorphisms mapped to 24...

Données sur les hydrocarbures aromatiques polycycliques dans les sédiments de l'estuaire et du golfe du Saint-Laurent (est du Canada)

Anne Corminboeuf
The St. Lawrence Estuarine System is a major seaway connecting eastern Canada with the Atlantic Ocean. Approximately 4000 vessels travel along this seaway every year that contribute, in addition to industrial activities, to anthropogenic stress in regard to many pollutants, including polycyclic aromatic hydrocarbons (PAHs). In this study, the concentrations of 23 PAHs (16 parent PAHs and 7 alkyl-PAHs), total organic carbon (TOC) as well as grain-size distributions were determined in 45 surface sediment and...

The predator activity landscape predicts the anti‐predator behavior and distribution of prey in a tundra community

Jeanne Clermont, Alexis Grenier-Potvin, Éliane Duchesne, Charline Couchoux, Frédéric Dulude-De Broin, Andréanne Beardsell, Joël Bêty & Dominique Berteaux
Predation shapes communities through consumptive and non-consumptive effects. In the latter case, prey respond to perceived predation risk through proactive or reactive risk management strategies occurring at different spatial and temporal scales. The predator-prey space race and landscape of fear concepts are useful to better understand how predation risk affects prey behavioral decisions and distribution. We assessed predation-risk effects in a terrestrial Arctic community, where the arctic fox is the main predator of ground-nesting birds....

Variable strength of predator-mediated effects on species occurrence in an arctic terrestrial vertebrate community

Éliane Duchesne, Jean-François Lamarre, Gilles Gauthier, Dominique Berteaux, Dominique Gravel & Joël Bêty
Indirect effects resulting from species sharing the same enemy can shape spatio-temporal variations in species occurrence. The strength of such effects remains poorly known in natural communities composed of species from different trophic levels interacting in heterogeneous landscapes. Benefiting from a well-known arctic vertebrate community and marked spatio-temporal variations in the density of key prey species, we examined the effects of direct predator-prey and indirect predator-mediated effects on species occurrence in the landscape. We found...

Life-history trade-offs, density, lay date—not personality—explain multibroodedness in great tits

Sarah Senécal, Alexia Mouchet & Niels J. Dingemanse
In various taxa, multibroodedness is a common breeding strategy. Life-history theory predicts that individuals can increase fitness by producing multiple broods within a season. Despite the apparent increase in the number of offspring parents might produce per season, not all individuals are multibrooded, suggesting a trade-off. We studied ecological and behavioral factors influencing the initiation of second clutches in great tits (Parus major), an optionally multibrooded bird species, by distinguishing two types of clutches: replacement...

A tale of two conifers: Migration across a dispersal barrier outpaced regional expansion from refugia

Matias Fernandez, Feng Sheng Hu, Daniel Gavin, Guillaume De Lafontaine & Katy Heath
Aim: Understanding how climate refugia and migration over great distances have facilitated species survival during past climate changes is crucial for evaluating contemporary threats to biodiversity, particularly in the face of dispersal barriers. We address this longstanding question on the refugial origins and post-glacial development of mesic forests. Location: Pacific Northwest, North America. Taxon: Mountain hemlock (Tsuga mertensiana) and western redcedar (Thuja plicata) Methods: Range-wide genotyping-by-sequencing (ddRADseq) of both study species and a pollen reconstruction...

Atlas des paysages acoustiques océaniques

L’Atlas des paysages acoustiques océaniques est un outil interactif en ligne permettant de visualiser des cartes des différentes composantes des paysages acoustiques océaniques : géophonie (sons d’origine géophysique telle que les vents et les vagues), biophonie (sons émis par les espèces animales telles que les baleines) et anthropophonie (sons provenant des activités humaines telles que le trafic maritime). Cette application permet de parcourir, dans l’espace 3D et le temps, les interactions entre les composantes acoustiques...

Data for: Parasitoids indicate major climate-induced shifts in Arctic communities

Tuomas Kankaanpää, Eero Vesterinen, Bess Hardwick, Niels Martin Martin Schmidt, Tommi Andersson, Paul Eric Aspholm, Isabel Barrio, Niklas Beckers, Joël Bêty, Tone Birkemoe, Melissa DeSiervo, Katherine Drotos, Dorothee Ehrich, Olivier Gilg, Vladimir Gilg, Nils Hein, Toke Høye, Kristian Jakobsen, Camille Jodouin, Jesse Jorna, Mikhail Kozlov, Jean-Claude Kresse, Don-Jean Leandri-Breton, Nicolas Lecomte, Maia Olsen … & Tomas Roslin
Climatic impacts are especially pronounced in the Arctic, which as a region is warming twice as fast as the rest of the globe. Here, we investigate how mean climatic conditions and rates of climatic change impact parasitoid insect communities in 16 localities across the Arctic. We focus on parasitoids in a wide-spread habitat, Dryas heathlands, and describe parasitoid community composition in terms of larval host use (i.e. parasitoid use of herbivorous Lepidoptera versus pollinating Diptera)...

Fine-scale spatial segregation in a pelagic seabird driven by differential use of tidewater glacier fronts

Philip Bertrand, Joël Bêty, Nigel Gilles Yoccoz, Marie-Josée Fortin, Hallvard Strøm, Harald Steen, Jack Kohler, Stephanie M. Harris, Samantha C. Patrick, Olivier Chastel, Pierre Blévin, Haakon Hop, Geir Moholdt, Joséphine Maton & Sébastien Descamps
In colonially breeding marine predators, individual movements and colonial segregation are influenced by seascape characteristics. Tidewater glacier fronts are important features of the Arctic seascape and are often described as foraging hotspots. Albeit their documented importance for wildlife, little is known about their structuring effect on arctic predator movements and space use. In this study, we tested the hypothesis that tidewater glacier fronts can influence marine bird foraging patterns and drive spatial segregation among adjacent...

Testing the precision and sensitivity of density estimates obtained with a camera-trap method revealed limitations and opportunities

Martin-Hugues St-Laurent, Pascal Pettigrew & Daniel Sigouin
The use of camera traps in ecology helps affordably address questions about the distribution and density of cryptic and mobile species. The Random encounter model (REM) is a camera-trap method that has been developed to estimate population densities using unmarked individuals. However, few studies have evaluated its reliability in the field, especially considering that this method relies on parameters obtained from collared animals (i.e. average speed, in km/h), which can be difficult to acquire at...

Inventaire des macroalgues et des macroinvertébrés benthiques selon un gradient de stress d’hypoosmolarité de la baie Barthélemy et des rivières Colombier, Mistassini, Franquelin et Saint-Nicolas de la Haute-Côte-Nord, Québec

Marie-Valentine Loiseau, Piero Calosi, Yanick Gendreau & Mathieu Cusson
Cet inventaire, du 26 septembre au 3 octobre 2019, visait à décrire les structures en espèces puis en traits fonctionnels des communautés de macroalgues et de macroinvertébrés benthiques, provenant des petits estuaires de la Haute-Côte-Nord du Québec, soit la baie Barthélemy et les rivières Colombier, Mistassini, Franquelin et Saint-Nicolas. Trois niveaux de stress hypoosmotique et un niveau de contrôle (eau marine) ont été visés pour chacun des estuaires choisis, à raison de huit quadrats par...

Plastic adjustments of biparental care behaviour across embryonic development under elevated temperature in a marine ectotherm

Davide Spatafora, Gloria Massamba N’Siala, Federico Quattrocchi, Marco Milazzo & Piero Calosi
Phenotypic plasticity in parental care investment allows organisms to promptly respond to rapid environmental changes by potentially benefiting offspring survival and thus parental fitness. To date, a knowledge gap exists on whether plasticity in parental care behaviours can mediate responses to climate change in marine ectotherms. Here, we assessed the plasticity of parental care investment under elevated temperatures in a gonochoric marine annelid with bi-parental care, Ophryotrocha labronica, and investigated its role in maintaining the...

Registration Year

  • 2021

Resource Types

  • Dataset
  • Model


  • Université du Québec à Rimouski
  • Fisheries and Oceans Canada
  • Université Laval
  • Parks Canada
  • The Arctic University of Norway
  • University of Windsor
  • Université de Sherbrooke
  • Centre d'Etudes Biologiques de Chizé
  • Université du Québec à Chicoutimi
  • University of Groningen