BREEDING ECOLOGY AND HABITAT USE OF THE DAITO SCOPS OWL (OTUS ELEGANS INTERPOSITUS) ON AN OCEANIC ISLAND
BREEDING ECOLOGY AND HABITAT USE OF THE DAITO SCOPS OWL (OTUS ELEGANS INTERPOSITUS) ON AN OCEANIC ISLAND
复制标题
DOI：
10.3356/jrr-10-82.1
复制
发表时间：
2011-12-01
影响因子：
1.7
通讯作者：
Takagi, Masaoki
中科院分区：
文献类型：
--
作者：
Akatani, Kana;Matsuo, Taro;Takagi, Masaoki
研究了大东角鸮（Otus elegans interpositus）的巢址、食性和栖息地利用。elegans），位于太平洋西北部的一个小海洋岛屿南大东。我们还调查了栖息地特征和繁殖性能之间的关系，在破碎和发达的栖息地在岛上。大多数猫头鹰在引进的木麻黄（木麻黄属）中使用巢腔。树木（n = 30），而少数猫头鹰使用垂直空洞破碎的本地扇棕榈（Livistona chinensis; n = 2）作为他们的巢址。猫头鹰以栖息在森林和开阔地带的猎物为食，包括蜘蛛（异足纲）、蟑螂（蜚蠊目）、蚱蜢（直翅目）和壁虎（壁虎科）。在2002-07年，我们使用无线电遥测技术跟踪了17名男性和7名女性。超过一半的猫头鹰在繁殖季节选择了鳍森林。在非繁殖季节，大多数猫头鹰选择森林和开阔地带之间的边缘，如草地和甘蔗地。猫头鹰更多的边缘栖息地在他们的家园范围内产卵早（n = 88育种尝试）比那些有少量的边缘。在南大东岛上，大东角鸮在利用人类改变的栖息地时表现出行为灵活性，这可能有助于它们避免灭绝。
We studied the nest sites, diet, and habitat use of the endemic population of the Daito Scops Owl (Otus elegans interpositus), a subspecies of the Elegant Scops Owl (O. elegans), on a small oceanic island, Minami-daito, in the northwestern Pacific Ocean. We also investigated the relationships between habitat characteristics and breeding performance in the fragmented and developed habitats on the island. Most owls used nest cavities in introduced casuarina (Casuarina spp.) trees (n = 30), whereas a few owls used vertical hollows in broken native fan palm (Livistona chinensis; n = 2) as their nest sites. Owls fed on prey inhabiting both forests and open areas, including spiders (Heteropoda), cockroaches (Blattodea), grasshoppers (Orthoptera) and geckos (Gekkonidae). We tracked 17 territorial males and seven females using radiotelemetry in 2002-07. More than half of the owls selected Fins forests during the breeding season. During the nonbreeding season, most owls selected edges between forests and open areas such as grass-lands and sugar cane fields. Owls with more edge habitat within their home ranges laid eggs earlier (n = 88 breeding attempts) than those with smaller amounts of edge. Daito Scops Owls exhibited behavioral flexibility in their use of human-altered habitats on Minami-daito Island, which may have contributed to their avoidance of extinction.