A5087076964- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Marine animal studies overview
- Species Distribution and Climate Change
- Wildlife-Road Interactions and Conservation
- Climate variability and models
- Marine and coastal plant biology
- Biocrusts and Microbial Ecology
- Animal Vocal Communication and Behavior
- Polar Research and Ecology
- Bird parasitology and diseases
- Marine and fisheries research
- Rangeland and Wildlife Management
- Sleep and Wakefulness Research
- Cryospheric studies and observations
- Tendon Structure and Treatment
- Interactive and Immersive Displays
- Animal Ecology and Behavior Studies
- Advanced Sensor and Energy Harvesting Materials
- Shoulder Injury and Treatment
- Sports injuries and prevention
- Physiological and biochemical adaptations
- Regulation of Appetite and Obesity
- Circadian rhythm and melatonin
Max Planck Institute of Animal Behavior
2020-2024
University of Copenhagen
2018-2024
University of Konstanz
2024
University of Aberdeen
2022
University of California System
2022
Dakota State University
2022
North Dakota State University
2022
Natural History Museum Aarhus
2018-2022
Aarhus University
2021
University of the Faroe Islands
2020
Overuse injuries have a significant impact on United States military service members, but research to date has been limited in its ability assess occupational and behavioral risk factors.To prospectively identify factors for the development of lower extremity tendinopathy plantar fasciitis personnel.Descriptive epidemiology study.Baseline data from Millennium Cohort Study, long-term observational cohort personnel, were utilized. Service members enrolled 2001, 2004, 2007. A total 80,106...
The mature adrenal cortex is dependent upon proopiomelanocortin (POMC)-derived peptides for the maintenance of its size, structure, and endocrine function. Recent studies in mice genetically deficient POMC have suggested that early exposure to POMC-derived might also be necessary development a functionally competent adrenal. We examined morphology function an independent line lacking all (Pomc-/-). Adrenal glands were found mice, although Pomc-/- had markedly reduced weight compared with...
Abstract We quantified the metabolic cost to Antarctic leafy liverwort Cephaloziella varians of responding an abrupt increase in ultraviolet B (UVB) radiation exposure natural environment at Rothera Point on western Peninsula (67 °34′S, 68 °07′W). The was protected from UVB for 44 days with screens containing Mylar polyester, after which time its thalli, are normally black colour, had become green owing reduced concentrations anthocyanidin, identified here as riccionidin A, thallus tips....
Abstract Background Migratory birds generally have tightly scheduled annual cycles, in which delays can carry-over effects on the timing of later events, ultimately impacting reproductive output. Whether temporal are more pronounced among migrations over larger distances, with tighter schedules, is a largely unexplored question. Methods We tracked individual Arctic Skuas Stercorarius parasiticus , long-distance migratory seabird, from eight breeding populations between Greenland and Siberia...
Few species are adapted to high latitudes, and many over-winter in milder climates with migrations involving extensive barrier crossings. By escaping extreme conditions for the majority of year, physiological behavioural adaptations presumably need be less pronounced. The snow bunting Plectrophenax nivalis is most northerly breeding passerine. We tracked Svalbard population using geolocators reveal that these individuals not only breed environmental extremes, but also spend winters severe...
The hypothalamic-pituitary-adrenal (HPA) axis is under complex regulatory control at multiple levels. Enzymatic regulation plays an important role in both circulating levels and target tissue exposure. Three key enzyme pathways are responsible for the immediate of glucocorticoids. De novo synthesis glucocorticoid from cholesterol involves a multistep enzymatic cascade. This cascade terminates with 11β-hydroxylase, final conversion 11 deoxy- precursors into active Additionally,...
Abstract Background Migratory birds generally have tightly scheduled annual cycles, in which delays can carry-over effects on the timing of later events, ultimately impacting reproductive output. Whether temporal are more pronounced among migrations over larger distances, with tighter schedules, is a largely unexplored question. Methods We tracked individual Arctic Skuas Stercorarius parasiticus , long-distance migratory seabird, from eight breeding populations between Greenland and Siberia...
ABSTRACT Steep declines in Arctic skua populations have been reported during the last half of 20 th century southern extent their breeding range. We used 24 years available ringing and re-encounter data from Faroe Islands, North Atlantic, to determine if patterns survival probabilities can be explained by large scale climatic events. Having first determined migratory phenology wintering regions, we tested Atlantic Oscillation (NAO) index Oceanic Niño (ONI) non-breeding period within a...
Individual responses of wild birds to fragmented habitat have rarely been studied, despite large-scale fragmentation and biodiversity loss resulting from widespread urbanisation. We investigated the spatial ecology Short-toed Treecreeper Certhia brachydactyla, a tiny, resident, woodland passerine that has recently colonised city parks at northern extent its range. High resolution spatiotemporal movements this obligate tree-living species were determined using radio telemetry within urbanized...
CapsuleThere were survival costs for adult European Robins Erithacus rubecula grounded at coastal sites following departure, but not young or Song Thrushes Turdus philomelos.AimsTo compare of crossing the Baltic Sea in autumn adults and two passerines: smaller Robin slightly larger Thrush.MethodsWe calculated mortality experienced those embarking on their first migration, modelling a capture-mark-recapture framework using ringing records from three bird observatories periphery Sea. We tested...
Key life-history events, such as breeding phenology, underlie much ecological research and inform conservation efforts. Simple methods that improve efficiency during studies are valuable, particularly in remote locations extreme climates. Building on an earlier study, we investigated the relationship between egg density incubation progression two Arctic- subarctic-breeding seabird species, Arctic Skua Stercorarius parasiticus Great S. skua, to statistically test its application a calibration...
Billions of birds undertake long-distance migration and the complexity schedules has only recently become clear. Such movements occur as a response to seasonality but ultimate drivers these changing distributions remain difficult study directly. Modeling seasonal based fundamentally on climate vegetation without parameterizing with empirical data, we focus potential role ambient temperature available resources in shaping migratory program. We simulate complete annual cycle over...
Abstract Avian migratory processes are typically precisely oriented, yet vagrants frequently recorded outside their normal range. Wind displaced often show corrective behaviour, and as an appropriate response is likely adaptive. We investigated the physiological to vagrancy in passerines. Activation of emergency life-history stage (ELHS), assessed by high baseline plasma corticosterone, a potential mechanism elicit compensatory behaviour challenges resulting from navigational error, coupled...
Polydimethylsiloxane (PDMS) silicone is a versatile polymer that cannot readily be formed into long filaments. Traditional spinning methods fail because PDMS does not exhibit long-range fluidity at melting. We introduce an improved method to produce filaments of by stepped temperature profile the as it cross-links from fluid elastomer. By monitoring its warm-temperature viscosity, we estimate window time when material properties are amendable drawing The pass through high-temperature tube...
Human-driven change is impacting ecosystems globally, with consequential declines in biodiversity. Long-distance migrants are particularly susceptible as they depend on conditions over large geographical scales and more likely to experience a greater range of pressures. One long-distance migrant that has experienced substantial across the North-East Atlantic Arctic Skua Stercorarius parasiticus however, little known about their migratory behaviour or routes undertake. We used geolocators...
We tracked departures of European Robins Erithacus rubecula stopping over during spring migration at Skagen, Denmark, and facing a sea crossing more than 50 km. The stopped on average for 3.8 days (range 1–14 days, n = 15) with departure being slightly warmer stopover (1.5°C warmer, P 0.003). Departures were concentrated in the evening, astronomical twilight, toward northeast (µ 33.3°, r 0.499, 0.021). mean northeasterly direction is close to standard direction. Most birds probably crossed...
Abstract Avian migratory processes are typically precisely oriented, yet vagrants frequently recorded outside their normal range. Wind displaced often show corrective behaviour, and as an appropriate response is likely adaptive. We investigated the physiological to vagrancy in passerines. Activation of emergency life-history stage (ELHS), assessed by high baseline plasma corticosterone, a potential mechanism elicit compensatory behaviour challenges resulting from navigational error. compared...