A5040983009- Wildlife Ecology and Conservation
- Genetic and phenotypic traits in livestock
- Reproductive Physiology in Livestock
- Animal Behavior and Reproduction
- Animal Behavior and Welfare Studies
- Animal Ecology and Behavior Studies
- Ecology and biodiversity studies
- Fish Ecology and Management Studies
- Rangeland Management and Livestock Ecology
- Rangeland and Wildlife Management
- Species Distribution and Climate Change
- Genetic diversity and population structure
- Effects of Environmental Stressors on Livestock
- Demographic Trends and Gender Preferences
- Ecology and Vegetation Dynamics Studies
- Avian ecology and behavior
- Bat Biology and Ecology Studies
- Primate Behavior and Ecology
- Indigenous Studies and Ecology
- Wildlife-Road Interactions and Conservation
- Genetic Mapping and Diversity in Plants and Animals
- Land Use and Ecosystem Services
- Plant and animal studies
- Evolutionary Psychology and Human Behavior
- Neuroendocrine regulation and behavior
Université de Sherbrooke
2016-2025
Australian National University
2018-2025
Center for Northern Studies
2008-2024
McGill University
2017-2021
Ecological Society of America
2016-2020
John Wiley & Sons (United States)
2016-2020
IFC Research (United Kingdom)
2018-2019
Wyoming Game and Fish Department
2019
Université Laval
2008-2018
Yale University
2018
▪ Abstract In large-herbivore populations, environmental variation and density dependence co-occur have similar effects on various fitness components. Our review aims to quantify the temporal variability of components examine how that affects changes in population growth rates. Regardless source variation, adult female survival shows little year-to-year [coefficient (CV <10%)], fecundity prime-aged females yearling rates show moderate <20%), juvenile young strong >30%). Old...
Knowledge of mammalian diversity is still surprisingly disparate, both regionally and taxonomically. Here, we present a comprehensive assessment the conservation status distribution world's mammals. Data, compiled by 1700+ experts, cover all 5487 species, including marine Global macroecological patterns are very different for land species but suggest common mechanisms driving endemism across systems. Compared with threat levels higher among mammals, driven processes (accidental mortality...
Methodological problems in describing patterns of senescence wild populations have until recently impeded progress understanding the evolution a process that decreases individual fitness. We investigated age- and sex-specific survival five three species ungulates (roe deer, Capreolus capreolus; bighorn sheep, Ovis canadensis; isard, Rupicapra pyrenaica), using recent statistical developments capture–mark–recapture models long-term (12 to 22 yr) data on marked individuals. The yearly females...
1 A major current challenge in ageing research is to understand why senescence rates vary between individuals, populations and species wild populations. 2 Recent studies clearly illustrate that senescent declines key demographic life-history traits can be observed many animal systems. 3 Here, we summarize the challenges facing researchers working wild. We concentrate on: (i) limited data availability, (ii) substantial individual heterogeneity typical of populations, (iii) incomplete capture...
Summary Wild large herbivores provide goods and income to rural communities, have major impacts on land use habitats of conservation importance and, in some cases, face local or global extinction. As a result, substantial effort is applied their management across the globe. To be effective, however, has science‐based. We reviewed recent fundamental studies with particular emphasis relationship between spatial temporal scales ecosystem response, decision implementation. Long‐term population...
Caribou ( Rangifer tarandus (L., 1758)) play a central role in the ecology and culture of much Canada, where they were once most abundant cervid. Most populations are currently declining, some face extirpation. In southern caribou range has retreated considerably over past century. The ultimate reason for their decline is habitat alterations by industrial activities. proximate causes predation and, to lesser extent, overharvest. southerly “Mountain” at imminent risk Mountain threatened...
Abstract Comparative analyses of survival senescence by using life tables have identified generalizations including the observation that mammals senesce faster than similar‐sized birds. These been challenged because limitations life‐table approaches and growing appreciation is more an increasing probability death. Without tables, we examine rates in annual individual fitness 20 individual‐based data sets terrestrial vertebrates with contrasting histories body size. We find widespread wild...
Abstract Secondary sexual traits, such as horns in ungulates, may be good indicators of genetic quality because they are costly to develop. Genetic effects on traits revealed by examining correlations between multilocus heterozygosity (MLH) and trait value. Correlations MLH fitness termed heterozygosity–fitness (HFC), reflect inbreeding depression or associative overdominance neutral microsatellite loci with directly affecting traits. We investigated HFCs for horn growth, body mass faecal...
Abstract The potential for selective harvests to induce rapid evolutionary change is an important question conservation and biology, with numerous biological, social economic implications. We analyze 39 years of phenotypic data on horn size in bighorn sheep ( Ovis canadensis ) subject intense trophy hunting 23 years, after which nearly ceased. Our analyses revealed a significant decline genetic value length rams, consistent response artificial selection this trait. probability that the...
The rate of adaptive evolution, the contribution selection to genetic changes that increase mean fitness, is determined by additive variance in individual relative fitness. To date, there are few robust estimates this parameter for natural populations, and it therefore unclear whether evolution can play a meaningful role short-term population dynamics. We developed applied quantitative methods long-term datasets from 19 wild bird mammal populations found that, while vary between fitness...
For capital breeders, mass may affect reproductive potential. Reproductive expenditure reduce future potential, particularly when resources are scarce. To test the hypothesis that success and costs of reproduction vary according to population density, we analyzed 25 yr data on bighorn ewes (Ovis canadensis). The number adult females was first limited by yearly removals, then allowed triple. We found no survival for aged 4-7 yr. 8-14 yr, density dependent barren but not weaned lambs. Failure...
Although mating systems and sexual selection have been intensively studied in ungulate model systems, very few studies combined genetic paternity analysis with individual phenotypic data over several breeding seasons. We used microsatellite to determine the parentage of 83 bighorn sheep (Ovis canadensis) born between 1995 2000 at Ram Mountain, Alberta, Canada. could assign 64 lambs a high level statistical confidence (95%). Within each season, most successful ram sired an average 35.5%...
Seasonal patterns of climate and vegetation growth are expected to be altered by global warming. In alpine environments, the reproduction birds mammals is tightly linked seasonality; therefore such alterations may have strong repercussions on recruitment. We used normalized difference index (NDVI), a satellite-based measurement that correlates strongly with aboveground net primary productivity, explore how annual variations in timing onset rate change production during green-up affected...
Longitudinal studies of survival are valuable because age-specific affects population dynamics and the evolution several life history traits. We used capture–mark–recapture models to assess relationship between sex, age, population, year study, disease, winter weather, density in two populations bighorn sheep (Ovis canadensis) Alberta, Canada. The Ram Mountain monitored for 20 yr, more than doubled density; Sheep River 13 experienced a pneumonia epizootic. Yearling varied among years was...
In female vertebrates, differences in fitness often correspond to phenotypic quality, suggesting that larger females have greater fitness. Variation individual can result from variation life span and/or yearly reproductive success, but no study has yet assessed the relationships between components of and quality while controlling for span. We tried fill this gap using data long–term monitoring (23 years) marked roe deer bighorn sheep, two ungulates with very different histories. both...
Within individual iteroparous mammals, a high rate of reproduction in early life may occur at the cost decreased near end life, leading to reproductive senescence. Using long-term data on marked individuals from two populations bighorn sheep (Ovis canadensis), we tested for existence senescence and trade-offs between longevity success ewes, which have an observed maximum life-span 19 yr. Lamb production older while weaning parous ewes was independent age one population with other. The...