Het kennissysteem voor Agrarisch Natuurbeheer, Beheer-op-Maat (BoM), is in 2019 op een aantal aspecten aangepast aan de wensen van de gebruikers (beheercollectieven). De kaartlagen die aan de basis staan van het kennissysteem – de openheid van het landschap, de bodemvochtigheid, de aanwezigheid van verstorende bronnen en de zwaarte van het gewas – ...
Published in Journal of Ornithology
The Yellowhammer (Emberiza citrinella) is a bird with a very long history of research in geographic song variation, dating back to the 1920s. Numerous features make the Yellowhammer a suitable model for studying songbird dialects: it is a common and easily recognizable species, has a simple song, keeps singing long into the season, and has dialects...
Published in BMC Ecology
BackgroundPathogens and parasites can have major impacts on host population dynamics, both through direct mortality and via indirect effects. Both types of effect may be stronger in species whose populations are already under pressure. We investigated the potential for blood parasites to impact upon their hosts at the immunological, physiological a...
Published in Journal of Ornithology
Male songbirds assess their rivals by listening to their songs and, in some species, are especially sensitive to certain parts of the song. Yellowhammers (Emberiza citrinella) sing songs with different structures consisting of an initial phrase of stereotyped and repeated notes in a trill, and a terminal phrase, present or not, which consists of lo...
Published in Biological Conservation
peer reviewed
Published in Journal of Ornithology
The yellowhammer Emberiza citrinella is a common European bird that sings in dialects that for decades have been distinguished by the existence of one single element (called a “specific”). In this study we looked into other possibilities for dialect discrimination, measuring 24 different variables. For the first time, multivariate statistics were u...
Published in Journal of Ethology
Interactive playback experiments were used to study the signal value of alternating and overlapping singing in the Yellowhammer Emberiza citrinella. We carried out interactive playback experiments in which 13 males were subjects of two treatments that differed in temporal pattern of playback song delivery (alternating vs overlapping). We measured 1...
