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Article
Nayden Chakarov, Auteur ; Christina Kassara, Auteur ; Peter Shurulinkov, Auteur ; Michael Wink, Auteur ; Christos Barboutis, AuteurHost–parasite interactions can shape avian population dynamics, and blood parasites can serve as useful markers of host movements across transmission landscapes. Eleonora’s Falcons (Falco eleonorae) occupy multiple biomes annually and, owing to [...]Nouveauté
Article
Alanis F. Cruz Flores, Auteur ; Nayden Chakarov, Auteur ; Guillermo Wiemeyer, Auteur ; Pablo Plaza, Auteur ; Iñigo Palacios-Martínez, Auteur ; Guillermo Blanco, AuteurIn wild animal populations, the prevalence of vector-borne parasites can be a serious threat if derived in disease, but extreme environments can act as natural refuges by restricting the presence of vectors and, consequently, reducing the transm[...]
Article
Lukas Hochleitner, Auteur ; Erkki Korpimäki, Auteur ; Nayden Chakarov, Auteur ; Caroline Isaksson, Auteur ; Carina Nebel, Auteur ; Swen C. Renner, Auteur ; Ville Vasko, Auteur ; Christian C. Voigt, Auteur ; Julien Terraube, Auteur ; Petra Sumasgutner, AuteurThe loss of habitat heterogeneity due to agricultural intensification has led to a global decline in farmland birds. Among them is the Eurasian Kestrel Falco tinnunculus, which occupies high trophic levels and may be adversely affected by reduce[...]
Article
Peter Shurulinkov, Auteur ; Girgina Daskalova, Auteur ; Nayden Chakarov, Auteur ; Krassimir Hristov, Auteur ; Silvia Dyulgerova, Auteur ; Yana Gocheva, Auteur ; Svilen Cheshmedzhiev, Auteur ; Minko Madzharov, Auteur ; Ivailo Dimchev, AuteurWe investigated the scale and characteristics of spring migration of soaring birds in Bourgas district, SE Bulgaria during three 5-day periods in March (27th-31st), April (20th-24th) and May (12th-16th) 2008. Simultaneous counts were carried out[...]
Article
Rudy M. Jonker, Auteur ; Nayden Chakarov, Auteur ; Oliver Krueger, AuteurThe effect of changing climatic conditions on wild populations has been the subject of much recent research. Most attention has been on the direct effects of climate changes on species of lower trophic levels and on the negative consequences of [...]
Article
Oliver Krueger, Auteur ; Nayden Chakarov, Auteur ; Jan T. Nielsen, Auteur ; Volkher Looft, Auteur ; Thomas Gruenkorn, Auteur ; Bernd Struwe-Juhl, Auteur ; Anders P. Moller, Auteur1. The habitat heterogeneity (HHH) and individual adjustment (IAH) hypotheses are commonly proposed to explain a decrease in reproduction rate with increasing population density. Higher numbers of low-quality territories with low reproductive su[...]
Article
Thomas Gruenkorn, Auteur ; Astrid Potiek, Auteur ; Volker Looft, Auteur ; Rudy M. Jonker, Auteur ; Nayden Chakarov, Auteur ; Oliver Krueger, AuteurDensity-dependent reproduction is commonly explained by either the habitat heterogeneity (HHH) or individual adjustment (IAH) hypothesis. Under the HHH, high quality territories are assumed to be occupied first. At higher density, occupation of [...]
