Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.01 vteřin. 
Song variation in the Chiffchaff \kur{Phylloscopus collybita}: Song parameters suitable for individual coding
PRŮCHOVÁ, Alexandra
My study deals with general individual characteristics in songs of a passerine bird species Chiffchaff (Phylloscopus collybita), especially I examines the potential of these characteristics for application in acoustic monitoring of bird individuals. I have found that Chiffchaffs have individually distinct songs but unfortunately, song features I measured were not stable in time and hence they would not be suitable for long-term monitoring of individuals. My study suggests that acoustic individual recognition might be challenging in songbird species due to the complexity and plasticity of their song.
Význam barvy a tečkovaného vzoru ve výstražné signalizaci slunéčka \kur{Harmonia axyridis}.
PRŮCHOVÁ, Alexandra
Warning meaning of several artificial as well as natural colour modifications of the Harlequin ladybird (Harmonia axyridis) has been tested in experiments with avian predators (Great tit ? Parus major). I was able to show a certain effect of black spots as their presence provided partial protection to the brown form, while the red form was protected even when unspotted.

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