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Article
Sascha Roesner, Auteur ; Kirsten Bogatz, Auteur ; Hendrik Trapp, Auteur ; Thomas Gruenkorn, Auteur ; Roland Brandl, AuteurMany bird species adjust their offspring sex ratio as a response to environmental conditions or sexual dimorphism in size and dispersal. Offspring sex ratios may therefore vary among populations depending on the different demographic and ecologi[...]
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
Bernd Struwe-Juhl, Auteur ; Thomas Gruenkorn, AuteurBetween 1977 and 2006, 328 White-tailed Sea Eagle nestlings were ringed in Schleswig-Holstein (northern Germany) as part of the international colour-ringing programme. By the end of 2006, 139 ringed birds had been either resighted (92) or found [...]
Article
Oliver Krueger, Auteur ; Thomas Gruenkorn, Auteur ; Bernd Struwe-Juhl, AuteurLinking age-specific vital rates to population growth through demographic matrix models can enhance our understanding of crucial population processes, vital in a conservation context. The white-tailed eagle (Haliaeetus albicilla) population in t[...]
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 [...]
