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Article
B. Hidding ; B.A. Nolet ; M. Van Eerden ; Matthieu Guillemain ; M. Klaassen 2009Aquat Bot 90 p321-327
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Matthieu Guillemain ; H. Fritz ; M. Klaassen ; Alan R. Johnson ; Heinz Hafner 2004J Ornithol 145 p152-158
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J. Madsen, Auteur ; M. Klaassen, AuteurAn abdominal profile index (API) was developed for pink-footed geese Anser brachyrhynchus as a measure of body condition. On basis of carcass analysis of 56 adult geese with known API prior to collection, we found significant linear relationship[...]
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A. Kvist, Auteur ; M. Klaassen, Auteur ; A. Lindstrom, AuteurThe relationship between mass loss rate and chemical power in Eying birds is analysed with regard to water and heat balance. Two models are presented: the first model is applicable to situations where heat loads are moderate, i.e. when heat bala[...]
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M. Klaassen, Auteur ; H. Biebach, AuteurRadar observations on the altitude of bird migration and altitudinal profiles of meteorological conditions over the Sahara desert are presented for the autumn migratory period. Migratory birds By at an average altitude of 1016 m (a.s.l.) during [...]
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S. R. McWilliams, Auteur ; C. Guglielmo, Auteur ; B. Pierce, Auteur ; M. Klaassen, AuteurUnlike exercising mammals, migratory birds fuel very high intensity exercise (e.g., flight) with fatty acids delivered from the adipose tissue to the working muscles by the circulatory system. Given the primary importance of fatty acids for fuel[...]
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A. Lindstrom, Auteur ; M. Klaassen, Auteur ; T. Piersma, Auteur ; N. Holmgren, Auteur ; L. Wennerberg, AuteurLittle is known about the fuel stores that arctic-breeding waders put on before departure from the breeding grounds. During a ship-based expedition to arctic Canada, we caught waders at seven, mainly coastal sites, within 68degrees-76degreesN an[...]
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Matthieu Guillemain, Auteur ; H. Fritz, Auteur ; M. Klaassen, Auteur ; Alan R. Johnson, Auteur ; Heinz Hafner, AuteurMost species of long-distance migratory birds put on energy stores to fuel their travels. However, recent studies have highlighted the potential costs associated with carrying too much fuel, either through increased predation risk or decreased f[...]
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U. Bauchinger, Auteur ; M. Klaassen, Auteur
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M. Klaassen, Auteur
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M. Klaassen, Auteur ; J. H. Beekman, Auteur ; J. Kontiokorpi, Auteur ; R. J. W. Mulder, Auteur ; B. A. Nolet, AuteurBecause energy reserves limit flight range, wind assistance may be of crucial importance for migratory birds. We tracked eight Bewick's swans Cygnus columbianus bewickii, using 95-g satellite transmitters with altimeters and activity sensors, du[...]
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M. Klaassen, Auteur ; T. Baarspul, Auteur ; T. Dekkers, Auteur ; P. van Tienen, AuteurWe reconstructed the nutrient source for egg synthesis by sampling Black-headed Gull (Larus ridibundus) eggs for yolk, analyzing their carbon stable isotope ratio, and comparing that to hatchling down. Most of the variation in carbon stable isot[...]
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J. H. Beekman, Auteur ; B. A. Nolet, Auteur ; M. Klaassen, AuteurDans Ardea (90(3) 2002)Some migratory birds refuel at stopover sites that they by-pass on the return trip. In theory, this skipping behaviour is only expected in time-selected migrants when the overflown site is of a lower quality than the departure site. We provide e[...]
