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Gewählte Master / Diploma Thesis:

Brigitte Komposch (2014): Verbreitung und Habitatnutzung des Europäischen Bibers (Castor fiber Linnaeus, 1758) in der Steiermark sowie Vorschläge für ein zukünftiges Management.
Master / Diploma Thesis - Institut für Wildbiologie und Jagdwirtschaft (IWJ), BOKU-Universität für Bodenkultur, pp 94. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The austrian populations of the European beaver, extinct in 1869, were re-established by reintroductions. The beaver is now present in all nine federal states, with a total population estimate of about 5,000. This Masters thesis presents the current distribution and population size in Styria, analyzes the importance of several habitat parameters for beaver presence and includes the results of a habitat suitability map for Styria. During the winter seasons of 2012/2013 and 2013/2014, beaver-activity signs were collected along 413 km of riversides in the basins of Mur, Lafnitz and Raab. Single-/pair and family territories were identified by distribution patterns of activity signs. Furthermore, the importance of several aquatic and terrestrial parameters for the habitat suitability were analysed by establishing a generalized linear mixed model. Based on available spatial data, the total colonisable area of the beaver was modeled using geographic information system tools. European beavers are present along the rivers Mur, Lafnitz, Feistritz, Raab, Sulm, Laßnitz, Kainach and some of their tributaries. Only two records originate from north of the alpine water divide. A total of 2,331 activity signs indicate the presence of 63 beaver territories. The current population estimate is 220. The territory length varies between 0.3 and 6.5 km, the mean distance between territories is 4.2 km. The GLMM shows that the probability of the presence of a territory centre increases with increasing width of the riparian forest. The GIS-model of the potential future range shows, that almost all lowland parts of Styria offer suitable habitats for this riverine keystone species. The final chapter gives an overview of management programmes of other Austrian federal states, of Bavaria and Switzerland and presents a comprehensive management program for a prospective European Beaver management in Styria.

Beurteilende(r): Hackländer Klaus
1.Mitwirkender: Parz-Gollner Rosemarie

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