碩士 / 國立屏東科技大學 / 野生動物保育研究所 / 101 / Tawny Fish Owl (Ketupa flavipes) is the only riparian owl in Taiwan and is one of the few nocturnal raptors which receive much research attention. Early studies focused on this species were mostly done in low elevation. Qijiawan River in Wuling is a unique stream ecosystem that is the major habitat of Formosan Landlocked Salmon (Oncorhynchus masou formosanus) and one of the highest areas within Tawny Fish Owl’s distribution range in Taiwan. Hence, this study utilized telemetry and infrared video camera to study the breeding ecology of Tawny Fish Owl in Wuling. I found two breeding territories of 5.3 km and 7.75 km length, and judging from the number of other non-breeding territories, two breeding territories might be the capacity of Wuling. The incubation period was 36-41 days which began in mid-February and ended in early April. Nestling period was approximately 56-57 days from early April to late May. All 3 nests recorded were located on cross-sections of trees with DBH > 1 m in primary forests, showing certain level of dependency on primary forests. Fish and amphibians comprised of the majority of the nestlings’ diet (47.8% and 42.8%, respectively). The findings of this study showed that the Tawny Fish Owl in Wuling used different nest sites and had different diet composition compared with populations in lower elevations, presumably due to difference in available resources. In addition, climate, individual, breeding pressure, season and the distance from nest to foraging site could all influence the breeding behaviors of Tawny Fish Owl. Compared with previous nest observation data, nestling’s diet could not represent adult’s diet. Division of work was obvious between sexes, where females stayed in nests in early nestling period and later join in the hunt, and males provided prey throughout the entire breeding season.
| Identifer | oai:union.ndltd.org:TW/101NPUS5746001 |
| Date | January 2013 |
| Creators | Chen-ning Wang, 汪辰寧 |
| Contributors | Dr. Yuan-shun Sun, 孫元勳 博士 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 39 |
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