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Article
Gergely Hegyi, Auteur ; Miklós Laczi, Auteur ; Nora Boross, Auteur ; Monika Jablonszky, Auteur ; Dora Koetel, Auteur ; Katalin Krenhardt, Auteur ; Gabor Marko, Auteur ; Gergely Nagy, Auteur ; Balazs Rosivall, Auteur ; Eszter Szasz, Auteur ; Laszlo Zsolt Garamszegi, Auteur ; Janos Toeroek, AuteurSexually selected colour traits of bird plumage are widely studied. Although the plumage is replaced only at one or two yearly moults, plumage colour has long been shown to change between moults. Nevertheless, most studies measure colour weeks t[...]
Article
Eszter Szoellosi, Auteur ; Balazs Rosivall, Auteur ; Dennis Hasselquist, Auteur ; Janos Toeroek, AuteurPlumage ornamentation often signals the quality of males and, therefore, female birds may choose elaborately ornamented mates to increase their fitness. Such mate choice may confer both direct and indirect benefits to the offspring. Males with e[...]
Article
Rita Hargitai, Auteur ; Gergely Nagy, Auteur ; Márton Herényi, Auteur ; Janos Toeroek, AuteurMany bird species lay eggs speckled with protoporphyrin-based spots, however, for most of them the function of eggshell spotting is unknown. A plausible hypothesis is that protoporphyrin might have a structural function in strengthening the eggs[...]
Article
Gergely Hegyi, Auteur ; Beata Szigeti, Auteur ; Janos Toeroek, Auteur ; Marcel Eens, AuteurThe importance of plumage colour as an indicator of individual quality and the basis of sexual selection has long been recognized. Of the three generally distinguished classes of plumage colours, melanin-based ornaments are traditionally conside[...]
Article
Rita Hargitai, Auteur ; Rafael Mateo, Auteur ; Janos Toeroek, AuteurAvian eggshell structure may have important consequences for embryonic growth and development, but relatively little is known about the factors responsible for variation in eggshell characteristics of wild birds. In this paper, we explored poten[...]
Article
Rita Hargitai, Auteur ; Gergely Hegyi, Auteur ; Janos Toeroek, AuteurWinter body condition may play important roles in the life history of migratory birds, but it is difficult to estimate. We used the growth rate of winter-grown tail feathers of Collared Flycatchers Ficedula albicollis as an indicator of winter b[...]
