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Documents disponibles écrits par cet auteur (9)
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Article
Sissel Sjoberg, Auteur ; Gintaras Malmiga, Auteur ; Andreas Nord, Auteur ; Arne Andersson, Auteur ; Johan Bäckman, Auteur ; Maja Tarka, Auteur ; Mikkel Willemoes, Auteur ; Kasper Thorup, Auteur ; Bengt Hansson, Auteur ; Thomas Alerstam, Auteur ; Dennis Hasselquist, AuteurMigrating from hemisphere to hemisphere is a global strategy for many bird species. Despite allowing birds to track productivity, these long-distance movements bring them in contact with inhospitable regions such as deserts and oceans. Sjöberg e[...]
Article
Thomas Alerstam, Auteur ; Johan Bäckman, Auteur ; Tom J. Evans, AuteurMany flying animals, like birds feeding their young, make commuting flights between a central place and foraging areas in the surroundings. Such central place foraging (CPF) represents a special case of foraging theory. We use simple geometry an[...]
Article
Sissel Sjoberg, Auteur ; Lykke Pedersen, Auteur ; Gintaras Malmiga, Auteur ; Thomas Alerstam, Auteur ; Bengt Hansson, Auteur ; Dennis Hasselquist, Auteur ; Kasper Thorup, Auteur ; Anders P. Tøttrup, Auteur ; Arne Andersson, Auteur ; Johan Bäckman, AuteurRecent advances in tracking technology are based on the use of miniature sensors for recording new aspects of individual migratory behaviour. In this study, we have used activity data loggers with barometric and temperature sensors to record the[...]
Article
Cecilia Nilsson, Auteur ; Johan Bäckman, Auteur ; Adriaan M. Dokter, AuteurAmong the many unique flight behaviours of Common Swifts Apus apus, the most puzzling may be their ascents to high altitudes during both dusk and dawn. Twilight ascents have been hypothesized to be functionally related to information acquisition[...]
Article
Thomas Alerstam, Auteur ; Jason W. Chapman, Auteur ; Johan Bäckman, Auteur ; Alan D. Smith, Auteur ; Håkan Karlsson, Auteur ; Cecilia Nilsson, Auteur ; Don R. Reynolds, Auteur ; Raymond H. G. Klaassen, Auteur ; Jane K. Hill, AuteurVast numbers of insects and passerines achieve long-distance migrations between summer and winter locations by undertaking high-altitude nocturnal flights. Insects such as noctuid moths fly relatively slowly in relation to the surrounding air, w[...]
Article
Johan Bäckman, Auteur ; Arne Andersson, Auteur ; Thomas Alerstam, Auteur ; Lykke Pedersen, Auteur ; Sissel Sjoberg, Auteur ; Kasper Thorup, Auteur ; Anders P. Tottrup, AuteurWe describe a method and device (
Article
Rachel Muheim, Auteur ; Johan Bäckman, Auteur ; Susanne Åkesson, Auteur
Article
Rachel Muheim, Auteur ; Susanne Åkesson, Auteur ; Johan Bäckman, Auteur ; Sissel Sjoberg, AuteurMore than three decades ago, Thomas Alerstam initiated the study of orientation and navigation of migratory songbirds in southern Sweden. Stensoffa Ecological Field Station, located approx. 20 km east of Lund, has since been a primary location f[...]
Article
Håkan Karlsson, Auteur ; Cecilia Nilsson, Auteur ; Johan Bäckman, Auteur ; Thomas Alerstam, AuteurNocturnal passerine migrants could substantially reduce the amount of energy spent per distance covered if they fly with tailwind assistance and thus achieve ground speeds that exceed their airspeeds (the birds' speed in relation to the surround[...]
