A5050141305- Avian ecology and behavior
- Animal Behavior and Reproduction
- Animal Vocal Communication and Behavior
- Bird parasitology and diseases
- Physiological and biochemical adaptations
- Bat Biology and Ecology Studies
- Fish Ecology and Management Studies
- Musculoskeletal pain and rehabilitation
- Shoulder Injury and Treatment
- Animal Nutrition and Physiology
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Cryospheric studies and observations
- Climate variability and models
- Spine and Intervertebral Disc Pathology
- Aerospace Engineering and Control Systems
- Advanced Aircraft Design and Technologies
- Wind and Air Flow Studies
Western University
2017-2023
A major uncertainty in automated radio-telemetry studies of small birds is the detection range receiving antennas. We compared simultaneous daytime detections (± 30 s) by and manual to assess probability proportion transmissions detected for on migratory stopover as a function distance, foraging guild (Black-throated Blue Warblers, Setophaga caerulescens, Yellow-rumped Dendroica coronata coronata, represented mid-canopy foliage gleaners White-throated Sparrows, Zonotrichia albicollis, ground...
Sex differences in the behaviors underlying avian protandry, where males arrive at breeding areas earlier than females, are still poorly understood for most species. We tested sex stopover behavior, refueling rates, and postdeparture movements during spring migration 2 consecutive years wood-warblers (Parulidae) a coastal site on Lake Erie, Ontario, using automated radio telemetry (black-throated blue warblers Setophaga caerulescens magnolia magnolia) analysis of plasma metabolites as...
Cost of flight at various speeds is a crucial determinant behaviour in birds. Aerodynamic models, predicting that mechanical power (Pmech) varies with speed U-shaped manner, have been used together an energy conversion factor (efficiency) to estimate metabolic (Pmet). Despite few empirical studies, efficiency has assumed constant across 23%. Ideally, should be estimated from measurements both Pmech and Pmet un-instrumented flight. Until recently, progress hampered by methodological...
Migratory birds use protein as a fuel source during flight, but the mechanisms and benefits of catabolism migration are poorly understood. The tissue-specific turnover rate hypothesis proposes that lean mass loss depends solely on constitutive degradation for given tissue, is therefore independent metabolic or environmental stimuli. However, it has been demonstrated stressors such humidity affect finding seemingly contradicts hypothesis. In order to resolve this, we placed migratory...
Abstract Most seasonally migrating songbirds exhibit protandry, whereby males arrive to breeding sites in the spring before females. The proximate behavioral mechanisms of protandry are largely unknown for most species, but could include earlier migratory departure from wintering by or overall faster migration males. Using onset and intensity restlessness as proxies timing rate migration, respectively, we evaluated these 2 hypothesized a Nearctic–Neotropical songbird, Black-throated Blue...
Fat contributes most of the energy for migratory flight birds, whereas lean body tissues (muscles and organs) contribute amino acids water to maintain metabolic osmotic homeostasis. During refueling at stopover sites, both fat mass are recovered, but dynamics this recovery poorly understood. We used non-invasive quantitative magnetic resonance (QMR) analysis measure > 3,500 individuals 25 songbird species during six spring three autumn migration seasons between 2009 2019 Long Point,...
Bird flight muscle can lose as much 20% of its mass during a migratory due to protein catabolism, and catabolism be further exacerbated under dehydrating conditions. However, the functional consequences exercise environment induced on has not been examined. We hypothesized that prolonged would cause decline in mass, aerobic capacity, contractile performance. This heightened for birds placed environmental conditions, which typically increases lean losses. Yellow-rumped warblers (Setophaga...
The influence of the social environment on timing annual cycle is poorly understood. Seasonally migratory birds are under pressure to accurately time their spring migration, and throughout cycle, they may experience variability local sex-ratio. A population-level male-biased sex ratio predicted advance migration in males attributed increased intra-specific competition for access females and/or breeding territories. present study had two goals. First, develop a method that utilizes digitally...