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Article
Anna George, Auteur ; Christian Aastrup, Auteur ; Tamara Emmenegger, Auteur ; Arne Hegemann, AuteurAvian blood parasites are vector-transmitted protozoan parasites and common in wild birds. They cause acute and chronic infections at different life stages with potentially detrimental effects on host fitness. Transmission often happens during t[...]Nouveauté
Article
Cas Eikenaar, Auteur ; Florian Packmor, Auteur ; Heiko Schmaljohann, Auteur ; Arne Hegemann, AuteurStopover periods in between migratory flights determine the speed of migration and as such may affect birds’ fitness. The decision to leave a stopover site is affected by, for example, energy stores and weather conditions. We investigated whethe[...]
Article
Franziska Tanneberger, Auteur ; Heiner Flinks, Auteur ; Susanne Arbeiter, Auteur ; Marharita Minets, Auteur ; Arne Hegemann, AuteurDans Ardea (105(2) 2017)Two methods are commonly used to study the diet of nestling passerines: the neck collar method and faecal sampling. Most studies apply either method, however, few methodological studies comparing both methods exist and are mainly limited to farm[...]
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Franziska Tanneberger, Auteur ; Heiner Flinks, Auteur ; Susanne Arbeiter, Auteur ; Marharita Minets, Auteur ; Arne Hegemann, AuteurDans Ardea (105(2) 2017)Two methods are commonly used to study the diet of nestling passerines: the neck collar method and faecal sampling. Most studies apply either method, however, few methodological studies comparing both methods exist and are mainly limited to farm[...]
Article
Libor Praus, Auteur ; Arne Hegemann, Auteur ; B. Irene Tieleman, Auteur ; Karel Weidinger, AuteurPredation is a major cause of breeding failure in bird species with open nests. Although many studies have investigated nest predation rates, direct identification of nest predators is sporadic, especially in (semi-)natural habitats. We quantifi[...]
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Arne Hegemann, Auteur ; Rob Voesten, AuteurThe Common Cuckoo Cuculus canorus is an obligate brood parasite and many studies have dealt with egg rejection by host species. However, evidence for ejection of Cuckoo nestlings by host parents has not been reported. Here we describe an observa[...]
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Arne Hegemann, Auteur ; Petra Salm, Auteur ; Birgit Beckers, AuteurThe Lapwing and most other farmland birds belong to the most threatened bird species in Germany and western Europe. Although the decline of the breeding population is beyond doubt, data on population size and population development in large area[...]
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Arne Hegemann, Auteur ; Petra Salm, Auteur ; Birgit Beckers, AuteurThe Lapwing and most other farmland birds belong to the most threatened bird species in Germany and western Europe. Although the decline of the breeding population is beyond doubt, data on population size and population development in large area[...]
Article
Arne Hegemann, Auteur ; Henk P. van der Jeugd, Auteur ; Merlijn de Graaf, Auteur ; Lotte L. Oostebrink, Auteur ; B. Irene Tieleman, AuteurIn recent years, Skylarks Alauda arvensis have undergone dramatic population declines in many European countries. Evidence exists for deteriorating conditions during the breeding season, but little is known about the situation during the rest of[...]
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Flavia Geiger, Auteur ; Arne Hegemann, Auteur ; Maurits Gleichman, Auteur ; Heiner Flinks, Auteur ; Geert R. De Snoo, Auteur ; Sebastian Prinz, Auteur ; B. Irene Tieleman, Auteur ; Frank Berendse, AuteurIn recent decades, Skylark (Alauda arvensis) populations in Europe have declined sharply due to agricultural intensification. Insufficient reproduction rates are one reason. Increased winter mortality may also be important, but studies outside t[...]
Article
Arne Hegemann, AuteurThe recent increase in the breeding population and the phenology of roosting Great Cormorants (Phalacrocorax carbo) are well described, but little is known about their migration patterns away from coastal areas. The few published data are based [...]
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Arne Hegemann, AuteurIn 2005, an occupied cliff nest of a Common Buzzard was found in a quarry near Geseke in North Rhine-Westphalia, Northwest Germany. Cliff nests are common in Great Britain and parts of the Alps, but in Central Europe tree nests are the rule. The[...]
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Henrik Mouritsen, Auteur ; Gesa Feenders, Auteur ; Arne Hegemann, Auteur ; Miriam Liedvogel, Auteur
