KUGscholar (University of Music and Performing Arts Graz)
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Male life history of a harlequin toad population in French Guiana
No full textHarlequin toads (Atelopus spp.) constitute one of the most threatened amphibian clades worldwide, yet much of their life history remains poorly understood. These anurans are strongly associated with stream environments, which are used for reproduction and occupied by males throughout the year, while only visited by females during the reproduction season. We studied a population of the Atelopus flavescens complex in French Guiana. We describe male population density, habitat use, site fidelity and movement, as well as home range behaviour – all prior to the arrival of females. We also present further natural history observations such as nocturnal resting sites and anecdotal observations of females. Our findings suggest that in this lowland population of Atelopus, males maintain territories for a relatively long time compared to other species. Within them, they acoustically compete for females, which they attempt to clasp for amplexus when they arrive later in the season on their way to the breeding sites
Orgeln und Glocken aus Rom ‒ ein klingender Streifzug durch Puccinis Tosca und Pfitzners Palestrina
No full textDas Stammbuch und die Tagebuchaufzeichnungen von Sophie Müller (1803–1830). Musikalische Freundschaften und Musikpraxis im Umfeld von Franz Schubert
No full textRepeatable Territorial Aggression in a Neotropical Poison Frog
No full textIntra-specific aggressive interactions play a prominent role in the life of many animals. While studies have found evidence for repeatability in boldness, activity, and exploration in amphibians, we know relatively little about consistent among-individual variation in aggressiveness, despite its importance for male-male competition and territoriality. Amphibians, and Neotropical poison frogs (Dendrobatidae) in particular, are highly suitable for investigating among-individual variation in aggressiveness, as most species exhibit strong territoriality in at least one of the sexes. In the present study, we aimed to fill this gap in knowledge, by investigating within- and between-individual variation in territorial aggression in a semi-natural population of the Neotropical poison frog Allobates femoralis (Dendrobatidae) in French Guiana. We conducted repeated, standardized behavioral tests to assess if the level of territorial aggression is consistent within and different between individuals. Further, we tested a possible link between body size and level of territorial aggression. We found moderate repeatability in territorial aggressiveness, but no link to age and/or body size. In conclusion, our study represents the first documentation of repeatable aggressive behavior in a territorial context in amphibians
Weiß und unheimlich, aber nicht das \u27Andere\u27 : Zur Körper- und Klangestaltung der Rollen für Countertenor in Olga Neuwirths Musiktheater
No full textVon Lemberg nach Graz : Die Netzwerke der Komponistin Julie Baroni-Cavalcabò (1813–1887)
No full textProceedings of the 23rd International Society for Music Information Retrieval Conference (ISMIR 2022)
No full text„ein Perpetuum Mobile, das seine antreibende Kraft aus der Musik erhält“ – Ingeborg Harer und das Institut für Alte Musik und Aufführungspraxis der Kunstuniversität Graz
No full textContrasting parental roles shape sex differences in poison frog space use but not navigational performance
No full textSex differences in vertebrate spatial abilities are typically interpreted under the adaptive specialization hypothesis, which posits that male reproductive success is linked to larger home ranges and better navigational skills. The androgen spillover hypothesis counters that enhanced male spatial performance may be a byproduct of higher androgen levels. Animal groups that include species where females are expected to outperform males based on life-history traits are key for disentangling these hypotheses. We investigated the association between sex differences in reproductive strategies, spatial behavior, and androgen levels in three species of poison frogs. We tracked individuals in natural environments to show that contrasting parental sex roles shape sex differences in space use, where the sex performing parental duties shows wider-ranging movements. We then translocated frogs from their home areas to test their navigational performance and found that the caring sex outperformed the non-caring sex only in one out of three species. In addition, males across species displayed more explorative behavior than females and androgen levels correlated with explorative behavior and homing accuracy. Overall, we reveal that poison frog reproductive strategies shape movement patterns but not necessarily navigational performance. Together this work suggests that prevailing adaptive hypotheses provide an incomplete explanation of sex differences in spatial abilities
In Search of a Lost Composition by Beethoven: The Equale in A-LId-49
No full textIt is well known that in 1812 Ludwig van Beethoven composed the Three Equali for Four Trombones (WoO 30) for the Linz Cathedral Kapellmeister Franz Xaver Glöggl. A letter from Glöggl to Robert Schumann, however, suggests that the composer originally composed four pieces. An examination of the autograph score of WoO 30 (D-B, Mus.ms.autogr.Beethoven, L.v., Grasnick 9), held by the Staatsbibliothek Berlin, seems to confirm this: one page of the manuscript most likely became detached.
In 2018, an anonymous example of an equale turned up in the Diocesan Archives in Linz. Although the newly found manuscript (A-Lld-49) is not in Beethoven’s hand, comparison with additions written on the autograph of WoO 30 identifies it to be that of Glöggl. The Linz source is a working sketch of an arrangement for three vocal parts made from a four-part trombone movement. One possible scenario is that Glöggl, who is not otherwise known as a composer, used Beethoven’s presumed fourth equale for this purpose. This is indicated by aspects such as key relationships and the identical, unusual key designation of all the compositions in question. It is more likely, however, that the rediscovered piece—a simple chorale—belongs to an older class of repertoire