A5039686596- Amphibian and Reptile Biology
- Animal Behavior and Reproduction
- Species Distribution and Climate Change
- Bat Biology and Ecology Studies
- Vector-borne infectious diseases
- Genetic diversity and population structure
- Spine and Intervertebral Disc Pathology
- Genetically Modified Organisms Research
- Anesthesia and Pain Management
- Dermatological diseases and infestations
- Wildlife Ecology and Conservation
- Insect Resistance and Genetics
- Renal and Vascular Pathologies
- CRISPR and Genetic Engineering
- Cardiac, Anesthesia and Surgical Outcomes
- Animal Vocal Communication and Behavior
- Urological Disorders and Treatments
- Turtle Biology and Conservation
- Animal and Plant Science Education
- Marine and environmental studies
- Peripheral Artery Disease Management
- Diagnosis and Treatment of Venous Diseases
- Lepidoptera: Biology and Taxonomy
- Identification and Quantification in Food
- Cardiac Arrhythmias and Treatments
University of Vienna
1999-2023
The University of Melbourne
1988-2009
Ordensklinikum Linz Barmherzige Schwestern
1997
Landeskrankenhaus Feldkirch
1955
Abstract Exact location and number of glacial refugia still remain unclear for many European cold‐blooded terrestrial vertebrates. We performed a fine‐scaled multilocus phylogeographic analysis two Bombina species combining mitochondrial variation 950 toads from 385 sites nuclear genes ( Rag‐1, Ncx‐1 ) subset samples to reconstruct their colonization contemporary patterns. identified the lowlands northwest Black Sea Carpathians be important refugial areas B. bombina variegata, respectively....
Habitat anthropization is a major driver of global biodiversity decline. Although most species are negatively affected, some benefit from anthropogenic habitat modifications by showing intriguing life-history responses. For instance, increased recruitment through higher allocation to reproduction or improved performance during early-life stages could compensate for reduced adult survival, corresponding "compensatory recruitment". To date, evidence compensatory in response modification...
For assessing the risk of escape transgenes from cultivation, persistence feral populations crop plants is an important aspect. Feral oilseed rape, Brassica napus, are well known, but only scarce information available on their population dynamics, particularly in Central Europe. To investigate genetic diversity, origin and rape Austria, we compared variation at nine polymorphic microsatellite loci eight with 19 commercial varieties. Overall, varieties showed a similar pattern level observed...
Abstract Large neotropical hylid and leptodactylid frogs frequently emit loud distress calls under hand held conditions. In spite of remarkable similarities in the production structure (i.e. spectral energy distribution, short rise fall times) these calls, distinct differences between screams ten species studied were found. The percentage adult individuals producing is high Leptodactylus pentadactylus (60%), Hyla lanciformis (55%) boans (42%). Screaming far more common large than their...
Es wird über angiographische Untersuchungen der Unterarme und Hände bei Sklerodermia diffusa berichtet. Dabei konnten Gefäßveränderungen beobachtet werden, die einer hochgradigen Endangiitis obliterans entsprechen. Diesen liegen offenbar zentralbedingte Störungen, wahrscheinlich im Hypophysen-Zwischenhirnsystem, das vegetative Nervensystem zugrunde. Die Gefäßveränderungen, letzten Endes Hautveränderungen Veränderungen in anderen Organen infolge des Durchblutungsschadens bedingen, genügen...
Summary 556 specimens of fire-bellied toads (Bombina bombina and B. variegata) were collected at 17 localities in Lower Austria the Burgenland. 18 colour pattern characters genotypes two marker loci recorded for all individuals. In 212 from 11 populations electrophoretic variation 12 protein loci, index L/T pigmentation testes studied. According to measurements diploid. Five enzyme (Ldh-l, Mdh-1, Idb-1, Aat, Adk) had alternate alleles fixed species. Utilizing these genetic markers a zone...
Abstract Geographic variability and genetic interactions in the contact zone between fire‐bellied toads, Bombina bombina B. variegata , were studied using analysis of morphological variation sixteen samples from Slovak Karst Aggtelek regions. Genotype frequencies at four marker loci ( Ldh‐1, Mdh‐1, Adk, Hem ) demonstrate existence a hybrid with highly variable population structures. While some appear to represent panmictic populations, other are very heterogeneous. Pure individuals both...
Allozyme variation in Chondrostoma from Austrian, French and northern Greek rivers was investigated. Populations of C. nasus the upper Danube catchment are genetically very similar apparently connected by high level gene flow. has conserved all major allozyme polymorphisms during its recent range expansion into Rhone basin. vardarense Axios Aliakmonas share most their allozymes with catchment, but have less genetic variation, a possible consequence bottleneck following river capture.
Magnetic orientation is a taxonomically widespread phenomenon in the animal kingdom, but has been little studied anuran amphibians. We collected Common Toads (Bufo bufo) during their migration towards spawning pond and tested them shortly after displacement for possible magnetic arena experiments. Animals were two different set-ups, geomagnetic field reversed field. To best of our knowledge, this first study testing adult anurans with controlled known strength alignment. After displacement,...
In a prospective study, experiences with peri-operative thoracic epidural analgesia (TEA) for surgery were documented. Two hundred and seven patients scheduled elective thoracotomy investigated. All received catheters 2 h pre-operatively. The inserted between T4-5 T8-9 intervertebral spaces. Epidural medication bupivacaine fentanyl was started preoperatively, maintained throughout continued post-operatively via patient controlled (PCA) devices. Patients anaesthetized propofol tracheal...
Seed spillage during handling and transportation promotes establishment invasion of feral crops into adjacent semi-natural habitats. This is also the case for oilseed rape (OSR, Brassica napus), where seed may lead to herbicide resistant OSR populations in countries without cultivation genetically modified OSR. Using data from Austria – import are banned as a prime example, we demonstrate that ports, oil mills, switchyards, border railway stations with different electric current systems...
In a prospective study, experiences with peri-operative thoracic epidural analgesia (TEA) for surgery were documented. Two hundred and seven patients scheduled elective thoracotomy investigated. All received catheters 2 h pre-operatively. The inserted between T4-5 T8-9 intervertebral spaces. Epidural medication bupivacaine fentanyl was started preoperatively, maintained throughout continued post-operatively via patient controlled (PCA) devices. Patients anaesthetized propofol tracheal...
The European green toad, Bufotes viridis (Laurenti, 1768), is a rare and protected species in Vienna. In spring summer 2020, we conducted survey to assess size status of its population Donaufeld, an agricultural area designated for real estate development. Recaptures photographically registered toads allowed estimate the with 137 individuals (confidence interval: 104-181). Comparatively large body indicates presence well-established population. Reproductive success was high study year. A...
Nach kurzer Beschreibung der Technik Angiographie Aortenäste mit perkutan eingeführtem Katheter werden die Vorteile dieser Methode besprochen. Die Splenoportographie über A. lienalis eröffnet neue diagnostische Möglichkeiten und zeichnet sich gegenüber direkten Milzpunktion durch Gefahrlosigkeit aus.
Body condition is increasingly used to assess the status of populations and as a proxy for individual fitness. A common, quick non-invasive approach estimate from relation between body length mass. Among methods developed this purpose, Scaled Mass Index (SMI) appears best suited comparisons among populations. We assembled data 17 European green toads (Bufotes viridis) with aim devising standard formula applicable monitoring species. The mean value exponents describing length–mass allometry...
Abstract Fire-bellied toads (Bombina bombina and B. variegata) were collected at eight locations in the Mátra mountains subjected to morphological examinations electrophoretic investigations of nine enzymes encoded by twelve presumptive loci. Both species occurred together one place. Another site was inhabited exclusively bombina, while only variegata found other localities. Analysis variation four marker loci revealed varying degrees introgression alien alleles all populations. Individuals...
Abstract The Australian frog species Geocrinia laevis and G. victoriana are similar in external morphology, but have distinct calls. In contact areas of their ranges, they form narrow hybrid zones. Osteological investigations did not reveal any qualitative character allowing reliable identification. Clear differences were found skull proportions, ranges variation the two overlap. Head proportions show a gradual transition across Morphological aberrations occur increased frequencies centre...
Research on navigation in animals is hampered by conflicting results and failed replications. In order to assess the generality of previous results, male Bufo bufo were collected during their breeding migration translocated two testing sites, 2.4 2.9 km away, respectively, from pond north Vienna (Austria). There each toad was tested twice for orientation responses a circular arena, night collection four days later. On first test day, toads showed significant axial along individual former...
The hybrid zone between Geocrinia laevis and G. victoriana, described by Littlejohn et al. (1971) on the basis of distinct calls these species, seems to have remained stable during last two decades. In northern part this zone, steep dines at three enzyme loci (Mdhp-1, Idh-2, Aat-2) coincide roughly with transition in advertisement call types, whereas clines other protein markers (Alb-1, Ck-A) are displaced opposite sides zone. These results confirm extend findings Gartside (1979) from a...
Yellow-bellied toad populations ( Bombina variegata ) show a wide fast–slow continuum of the life-history trait longevity ranging from 5 to 23 years. We investigated in Germany n = 8) and Austria 1) determine their position within potential drivers adult survival at local continental scale. Intrinsic extrinsic factors considered were weather, nutritional state, allocation ingested energy somatic growth, pathogen prevalence, geographical clines (latitude, altitude, longitude)....