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Documents disponibles écrits par cet auteur (18)
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Article
Marie Adámková, Auteur ; Oldřich Tomášek, Auteur ; Tomáš Albrecht, AuteurThe length of the ornamental tail rectrices has been shown to be an important condition-dependent sexually selected trait in various bird species. Similarly, the shape and depth of the tail fork may represent a costly sexual signal that enhances[...]
Article
Jana Svobodová, Auteur ; Petra Bauerová, Auteur ; Jiří Eliáš, Auteur ; Hana Velová, Auteur ; Michal Vinkler, Auteur ; Tomáš Albrecht, AuteurThe phenotype-linked fertility hypothesis (PLFH) proposes that both sexual ornaments and sperm traits are phenotypically plastic and co-affected by environmental factors through individual condition, resulting in a positive correlation between o[...]
Article
Jana Svobodová, Auteur ; Barbora Gabrielová, Auteur ; Pavel Hyršl, Auteur ; Tomáš Albrecht, Auteur ; Michal Vinkler, AuteurAccording to the viability indicator hypothesis, ornaments of many bird species honestly signal individual quality and health status. In this study, we investigated the health- and stress-indicating capacity of both feather- and skin-based ornam[...]
Article
Taiwo C. Omotoriogun, Auteur ; Terje Laskemoen, Auteur ; Melissah Rowe, Auteur ; Tomáš Albrecht, Auteur ; Rauri C. K. Bowie, Auteur ; Ondřej Sedláček, Auteur ; David Hořák, Auteur ; Ulf Ottosson, Auteur ; Jan T. Lifjeld, AuteurBirds show considerable variation in sperm morphology. Closely related species and subspecies can show diagnostic differences in sperm size. There is also variation in sperm size among males within a population, and recent evidence from passerin[...]
Article
Eva Cepakova, Auteur ; Miroslav Šálek, Auteur ; Jaroslav Cepak, Auteur ; Tomáš Albrecht, Auteur
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Eva Cepakova, Auteur ; Miroslav Šálek, Auteur ; Jaroslav Cepak, Auteur ; Tomáš Albrecht, Auteur
Article
Jakub Kreisinger, Auteur ; Pavel Munclinger, Auteur ; Veronika Javurkova, Auteur ; Tomáš Albrecht, AuteurA method that was based on non-invasive sampling of genetic material was used to determine the rates of extra-pair paternity (EPP) and conspecific brood parasitism (CBP) in mallards. Maternal and offspring DNA were extracted from feathers in nes[...]
Article
Ondřej Sedláček, Auteur ; Jana Vokurková, Auteur ; Michal Ferenc, Auteur ; Eric Nana Djomo, Auteur ; Tomáš Albrecht, Auteur ; David Hořák, AuteurAcoustic signals are frequently used for estimating avian species richness, abundance and community composition. However, sampling by traditional methods of bird surveys is often limited by availability of experienced researchers in the field, e[...]
Article
Veronika Javurkova, Auteur ; Tomáš Albrecht, Auteur ; Jakub Mrazek, Auteur ; Jakub Kreisinger, AuteurMicrobial infection is considered a critical cause of hatching failure in birds. Although several behavioural mechanisms are believed to improve reproductive success in birds, their direct effect on the risk of bacterial trans-shell infection (B[...]
Article
Adela Petrzelkova, Auteur ; Hannu Poysa, Auteur ; Petr Klvana, Auteur ; Tomáš Albrecht, Auteur ; David Hořák, AuteurConspecific brood parasites lay eggs in nests of other females of the same species. A variety of methods have been developed and used to detect conspecific brood parasitism (CBP). Traditional methods may be inaccurate in detecting CBP and in rev[...]
Article
Michal Vinkler, Auteur ; Jan Schnitzer, Auteur ; Pavel Munclinger, Auteur ; Jan Votypka, Auteur ; Tomáš Albrecht, AuteurHaematological methods are widely utilised among avian ecologists as a means for individual health assessment. However, the technical simplicity of some of the tests may easily lead to oversimplification of the evaluation. Here, we show in the S[...]
Article
Michal Vinkler, Auteur ; Tomáš Albrecht, AuteurImmunocompetence is a term used in avian immunological ecology to refer to the ability of an individual to overcome potential parasite infections. However, there are multiple ecological definitions of this term currently used and all of them are[...]
Article
Jana Svobodová, Auteur ; Barbora Gabrielová, Auteur ; Petr Synek, Auteur ; Petr Marsik, Auteur ; Tomas Vanek, Auteur ; Tomáš Albrecht, Auteur ; Michal Vinkler, AuteurBirds express various secondary ornaments that can indicate individual condition and health. Amongst these, red-coloured carotenoid-based ornaments are supposed to be particularly valuable predictors of individual quality, due to their sensitivi[...]
Article
Ondrej Stovicek, Auteur ; Jakub Kreisinger, Auteur ; Veronika Javurkova, Auteur ; Tomáš Albrecht, AuteurConspecific brood parasitism (CBP) is a reproductive tactic whereby a parasitic female lays its eggs into the nests of other conspecific females. Genetic-based data on the occurrence of CBP in birds, however, is still relatively scarce. We analy[...]
Article
Marta Promerova, Auteur ; Michal Vinkler, Auteur ; Josef Bryja, Auteur ; Radka Polakova, Auteur ; Jan Schnitzer, Auteur ; Pavel Munclinger, Auteur ; Tomáš Albrecht, AuteurGenes of the Major Histocompatibility Complex (MHC) represent an essential component of the vertebrate acquired immune system. In the last decades, the role of MHC genes in mate choice has been subject of particular scientific interest. However,[...]
Article
Eliska Padysakova, Auteur ; Martin Salek, Auteur ; Lukas Polednik, Auteur ; Frantisek Sedlacek, Auteur ; Tomáš Albrecht, AuteurContext. Density-dependent predation has been recently discussed as a contributing cause of duck nest failure. Aims. We tested whether nest density increases the nest predation rate (density-dependent predation) in patches of littoral vegetation[...]
Article
Eliska Padysakova, Auteur ; Martin Salek, Auteur ; Lukas Polednik, Auteur ; Frantisek Sedlacek, Auteur ; Tomáš Albrecht, AuteurAlien species of predators may negatively influence the breeding success of waterfowl. Previous studies have tested whether predator removal causes an increase in nest success and breeding densities; however, conclusions have been contradictory.[...]
Article
David Hořák, Auteur ; Tomáš Albrecht, AuteurInvestigators studying the relationship between egg size and young size often face difficulties in assigning particular young to particular eggs. We present a new method based on the use of separate net sacks for each egg that allowed us to stud[...]
