A5065210525- Avian ecology and behavior
- Animal Behavior and Reproduction
- Species Distribution and Climate Change
- Marine animal studies overview
- Electromagnetic Fields and Biological Effects
- Wildlife Ecology and Conservation
- Animal Vocal Communication and Behavior
- Geological Studies and Exploration
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Social and Educational Sciences
- Rangeland and Wildlife Management
- Fish Ecology and Management Studies
- Arctic and Russian Policy Studies
- Arctic and Antarctic ice dynamics
- Impact of Light on Environment and Health
- Fire effects on ecosystems
- Animal Diversity and Health Studies
- Biomimetic flight and propulsion mechanisms
- Methane Hydrates and Related Phenomena
- Identification and Quantification in Food
- Quantum Dots Synthesis And Properties
- Bat Biology and Ecology Studies
- Turtle Biology and Conservation
- Occupational Health and Safety Research
Lund University
2015-2024
Swedish University of Agricultural Sciences
2023
University of Maryland, Baltimore
2014
University of Zurich
1999
Flight speed is expected to increase with mass and wing loading among flying animals aircraft for fundamental aerodynamic reasons. Assuming geometrical dynamical similarity, cruising flight predicted vary as (body mass)1/6 (wing loading)1/2 bird species. To test these scaling rules the general importance of speeds, we used tracking radar measure flapping speeds individuals or flocks migrating birds visually identified species well their altitude winds at altitudes where were flying....
Vast numbers of insects and passerines achieve long-distance migrations between summer winter locations by undertaking high-altitude nocturnal flights. Insects such as noctuid moths fly relatively slowly in relation to the surrounding air, with airspeeds approximately one-third that passerines. Thus, it has been widely assumed windborne insect migrants will have comparatively little control over their migration speed direction compared migrant birds. We used radar carry out first comparative...
We describe a method and device (< 1.2 g) for recording, processing storing data about activity location of individuals free‐living songbirds throughout the annual cycle. Activity level was determined every five minutes from 100 ms samples accelerometer with 5 s between sampling events. levels were stored on an hourly basis cycle, allowing periods resting/sleep, continuous flight intermediate (foraging, breeding) to be distinguished. Measurements light sensor preprogrammed key stationary...
Billions of nocturnally migrating songbirds fly across oceans and deserts on their annual journeys. Using multisensor data loggers, we show that great reed warblers (Acrocephalus arundinaceus) regularly prolong otherwise strictly nocturnal flights into daytime when crossing the Mediterranean Sea Sahara Desert. Unexpectedly, prolonging flights, they climbed steeply at dawn, from a mean 2394 meters above sea level to reach extreme cruising altitudes (mean 5367 maximum 6267 level) during...
SUMMARY Magnetic compass orientation in birds has been shown to be light dependent. Results from behavioural studies indicate that magnetoreception capabilities are disrupted under of peak wavelengths longer than 565 nm, and shifts have observed at higher intensities(43-44×1015 quanta s-1 m-2). To investigate further the function avian magnetic with respect wavelength intensity light, we carried out cage experiments juvenile European robins, caught during their first autumn migration,exposed...
Abstract Advances in information technology are increasing the use of radar as a tool to investigate and monitor bird migration movements. We set up field campaign compare validate outputs from different systems. Here we pattern nocturnal movements recorded by four systems at site southern Sweden. Within range weather ( WR ) Ängelholm, operated “BirdScan” BS dedicated radar, standard marine MR ), tracking TR ). The measures nightly intensities, provided three radars , corresponded well with...
Animals that use flight as their mode of transportation must cope with the fact migration and orientation performance is strongly affected by flow medium they are moving in, winds. Different strategies can be used to mitigate negative effects benefit from positive a flow. The an animal will constrained relationship between speed animal's own propulsion in relation surrounding air. Here we analyse entomological ornithological radar data north-western Europe investigate how two different...
Every year, billions of seasonal migrants connect continents by transporting nutrients, energy, and pathogens between distant communities ecosystems. For animals that power their movements endogenous energy stores, the daily intake rates strongly influence speed migration. If access to food resources varies cyclically over season, sensitive changes in may adjust timing migration accordingly. As an effect, individuals adjusting a common temporal cycle are expected approach synchrony foraging...
Several factors affect the flight altitude of migratory birds, such as topography, ambient temperature, wind conditions, air humidity, predation avoidance, landmark orientation, and avoiding over-heating from direct sunlight.1-6 Recent tracking birds over long distances has shown that migrants change more commonly dramatically than previously thought.4-8 The reasons behind these changes are not well understood. In their seasonal migrations between Sweden sub-Saharan Africa, great snipes...
Tracking techniques are vital for the understanding of biology and ecology organisms. While such have provided important information on movement migration large animals, as mammals birds, scientific advances in individual behaviour interactions small (mm-scale) organisms been hampered by constraints, sizes existing tracking devices, methods. By combining biology, chemistry physics we here present a method that allows three-dimensional (3D) mm-sized aquatic The is based in-vivo labelling with...
Abstract Background Small songbirds respond and adapt to various geographical barriers during their annual migration. Global flyways reveal the diverse migration strategies in response different barriers, among which are high-elevation plateaus. However, few studies have been focused on largest highest plateau world, Qinghai–Tibet Plateau (QTP) poses a significant barrier migratory passerines. The present study explored routes of population Siberian Rubythroats ( Calliope calliope ) that...
Studies of bird migration in the Beringia region Alaska and eastern Siberia are special interest for revealing importance between Eurasia North America, evaluating orientation principles used by birds at polar latitudes understanding evolutionary implications intercontinental migratory connectivity among as well their parasites. We tracking radar placed onboard ice-breaker Oden to register flights from 30 July 19 August 2005 we encountered extensive whole range latitude 64° N Bering Strait...
Recent advances in tracking technology are based on the use of miniature sensors for recording new aspects individual migratory behaviour. In this study, we have used activity data loggers with barometric and temperature to record flight altitudes as well ground elevations during stationary periods songbirds. We tracked one red‐backed shrike great reed warbler along their autumn migration from Europe Africa. Both individuals performed stepwise travel segments climbed most metres passage...
The arctic tern Sterna paradisaea completes the longest known annual return migration on Earth, traveling between breeding sites in northern and temperate regions survival/molt areas Antarctic pack-ice zone. Salomonsen (1967, Biologiske Meddelelser, Copenhagen Danske Videnskabernes Selskab, 24, 1) put forward a hypothetical comprehensive interpretation of this global pattern, suggesting food distribution, wind patterns, sea ice molt habits as key ecological evolutionary determinants. We used...
We have studied the nocturnal flight behaviour of common swift ( Apus apus L.), by use a tracking radar. Birds were tracked from Lund University in southern Sweden during spring migration, summer roosting flights and autumn migration. Flight speeds compared with predictions mechanical optimal migration theories. During spring, predicted to be higher than both due time restriction. In such cases, birds fly at speed that maximizes overall For flights, lower since is minimum power involves...
ABSTRACT Avian migrants may fly at a range of altitudes, but usually concentrate near strata where combination flight conditions is favourable. The aerial environment can have large impact on the performance migrant and highly dynamic, making it beneficial for bird to regularly check alternative altitudes. We recorded migrations between northern Europe sub-Saharan Africa European nightjars Caprimulgus europaeus explore their altitudinal space use during spring autumn flights test whether...
Swifts, Apus apus, spend the night aloft and this offers an opportunity to test degree of adaptability bird orientation flight different ecological situations. We predicted swifts' behaviour by assuming that they are adapted minimize energy expenditure during nocturnal a compensatory homing if become displaced wind. tested predictions recording altitudes, speeds directions under wind conditions with tracking radar; we found agreement between observations for behaviour, but not altitude speed...