9 Works

Data from: Social selection acts on behavior and body mass but does not contribute to the total selection differential in Eastern chipmunks

Francesca Santostefano, Dany Garant, Patrick Bergeron, Pierre-Olivier Montiglio & Denis Réale
Through social interactions, phenotypes of conspecifics can affect an individual’s fitness, resulting in social selection. Social selection is assumed to represent a strong and dynamic evolutionary force that can act with or in opposition to natural selection. Few studies, however, have estimated social selection and its contribution to total selection in the wild. We estimated natural and social selection gradients on exploration, docility, and body mass, and their contribution to selection differentials, in a wild...

Data from: Trophy hunting mediates sex-specific associations between early-life environmental conditions and adult mortality in bighorn sheep

Mathieu Douhard, Marco Festa-Bianchet, Julie Landes & Fanie Pelletier
1. Environmental conditions during early development, from conception to sexual maturity, can have lasting consequences on fitness components. Although adult lifespan often accounts for much of the variation in fitness in long-lived animals, we know little about how early environment affects adult lifespan in the wild, and even less about whether these effects differ between the sexes. 2. Using data collected over 45 years from wild bighorn sheep (Ovis canadensis), we investigated the effects of...

Data from: Causes and short-term consequences of variation in milk composition in wild sheep

Limoilou-Amelie Renaud, F. Guillaume Blanchet, Alan A. Cohen & Fanie Pelletier
1.Ecologists seek to understand the fitness consequences of variation in physiological markers, under the hypothesis that physiological state is linked to variability in individual condition and life history. 2.Thus, ecologists are often interested in estimating correlations between entire suites of correlated traits, or biomarkers, but sample size limitations often do not allow us to do this properly when large numbers of traits or biomarkers are considered. 3.Latent variables are a powerful tool to overcome this...

Data from: Species richness change across spatial scales

Jonathan M. Chase, Brian J. McGill, Patrick L. Thompson, Laura H. Antão, Amanda E. Bates, Shane A. Blowes, Maria Dornelas, Andrew Gonzalez, Anne E. Magurran, Sarah R. Supp, Marten Winter, Anne D. Bjorkmann, Helge Bruelheide, Jarrett E.K. Byrnes, Juliano Sarmento Cabral, Robin Ehali, Catalina Gomez, Hector M. Guzman, Forest Isbell, Isla H. Myers-Smith, Holly P. Jones, Jessica Hines, Mark Vellend, Conor Waldock & Mary O'Connor
Humans have elevated global extinction rates and thus lowered global-scale species richness. However, there is no a priori reason to expect that losses of global species richness should always, or even often, trickle down to losses of species richness at regional and local scales, even though this relationship is often assumed. Here, we show that scale can modulate our estimates of species richness change through time in the face of anthropogenic pressures, but not in...

Data from: Maternal longevity and offspring sex in wild ungulates

Mathieu Douhard, Marco Festa-Bianchet, Sandra Hamel, Dan Nussey, Steeve Côté, Josephine Pemberton & Fanie Pelletier
In species with sexual size dimorphism, offspring of the larger sex usually have greater energy requirements and may lead to greater fitness costs for parents. The effects of offspring sex on maternal longevity, however, have only been tested in humans. Human studies produced mixed results and considerable debate mainly due to the difficulty of distinguishing the effects of sexual dimorphism from sociocultural factors. To advance this debate, we examined how the relative number of sons...

Plant biodiversity data and environmental and spatial data from Jebel Ichkeul, a limestone mountain in northern Tunisia (1983)

D.A. Kirk, K. Hébert & F. B. Goldsmith
Records for herbaceous and woody plants at 78 nested quadrats on a limestone mountain (Jebel Ichkeul) in Le Parc National de L’Ichkeul are presented. Data for plants represent percent cover (Braun-Blanquet scale), to identify environmental gradients and investigate phytosociology of plant communities. Environmental variables are also presented: altitude, slope, aspect, rock out cropping, index of grazing intensity (78 sites) and olive tree densities by size class (69 sites). Soil pH was collected for 50 sites....

Priority effects will impede range shifts of temperate tree species into the boreal forest

Kevin Solarik, Kevin Cazelles, Christian Messier, Yves Bergeron & Dominique Gravel
Temperate tree species are expected to expand their distribution into the boreal forest in response to climate change. However, it is becoming increasingly clear that many species will experience significant setbacks in capacity to migrate due to a series of unfavourable conditions impacting their recruitment success, and thus their ability to colonize new locations. We quantify the relative influence of a series of factors important for tree seedling recruitment at range margins: propagule dispersal, substrate...

Magnetic resonance imaging reveals human brown adipose tissue is rapidly activated in response to cold

Katherine Morrison, Stephan Oreskovich, Frank Ong, Basma Ahmed, Norman Konyer, Denis Blondin, Elizabeth Gunn, Nina Singh, Michael Noseworthy, Francois Haman, Andre Carpentier, Zubin Punthakee & Gregory Steinberg
Context. In rodents, cold exposure induces the activation of brown adipose tissue (BAT) and the induction of intracellular triacylglycerol (TAG) lipolysis. However, in humans, the kinetics of supraclavicular (SCV) BAT activation and the potential importance of TAG stores remain poorly defined. Objective. To determine the time course of BAT activation and changes in intracellular TAG using magnetic resonance imaging (MRI) assessment of the SCV (i.e. BAT depot) and fat in the posterior neck region (i.e....

Data from: Testing the importance of harvest refuges for phenotypic rescue of trophy hunted populations

Yoanna Poisson, Marco Festa-Bianchet & Fanie Pelletier
Sustainable exploitation must minimize its impact on the ecology and evolution of exploited wildlife. Intense phenotype-based selective harvests can induce evolutionary change. Refuges could mitigate those evolutionary effects if individuals not subject to selective hunting in harvest refuges migrated and reproduced in hunted areas. The role of harvest refuges on phenotypic rescue of trophy-hunted species, however, has rarely been tested. We investigated spatial and temporal variation in the effect of refuges on horn size and...

Registration Year

  • 2019
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  • Dataset
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Affiliations

  • Université de Sherbrooke
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  • University of Quebec at Montreal
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  • University of Edinburgh
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  • St. Joseph's Hospital
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  • University of Würzburg
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  • The Arctic University of Norway
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  • Northern Illinois University
    1
  • University of Maine
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  • Aarhus University
    1