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Gewählte Master / Diploma Thesis:

Christian Metzler (2011): Home ranges and dispersal patterns of Great Spotted Kiwi (Apteryx haastii) subadults.
Master / Diploma Thesis - Institut für Wildbiologie und Jagdwirtschaft (IWJ), BOKU-Universität für Bodenkultur, pp 82. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Since human arrival in New Zealand a number of different species have become extinct or endangered mainly through mammalian predation or competition. The nocturnal, flight less bird great spotted Kiwi (GSK) (Apteryx haastii) is an example for this biodiversity threat. For this reason the GSK is supported by the Operation Nest EggTM (ONE) program. Within the ONE program five GSK chicks were artificially hatched and raised in a predator free area until they reached a weight, which increases the chances of the chicks being able to defend themselves in the wild. These particular subadults were released into the Arthurs Pass National Park on the South Island of New Zealand. The aim of the study is to determine the home range size, to assess the movement and activity pattern of those birds. This was made possible using radio telemetry to track and determine the location of the birds through triangulation. These locations were used to calculate the home range size with the Minimum Convex Polygon and Harmonic Mean methods. The activity and weight data shows that the birds were able to sustain themselves in the wild after release. The size of the home range varied between birds and method. Beside that some locations of the birds were in open grassland and sometimes close to human infrastructure. Unfortunately three of the five birds died during the project. One bird died of avian malaria, one of fungal pneumonia and one of predation. These results show the potential of the ONE program and their capacity to improve their success. Also this study could improve the knowledge about subadult GSK, and also raise some new questions.

Beurteilende(r): Hackländer Klaus

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