灰鸮在繁殖季节的活动范围和栖息地选择

The UW National Parks Service Research Station Annual Reports Pub Date : 2019-12-15 DOI:10.13001/uwnpsrc.2019.5745

Katherine Gura, B. Bedrosian, A. Chalfoun, S. Patla

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引用次数: 0

摘要

在育种等关键阶段确定待研究物种的资源需求对有效管理至关重要。在多个空间(家域和家域内水平)和时间(筑巢和羽化后)上量化了成年大灰猫头鹰繁殖季节的家域属性和栖息地选择;美国怀俄明州西部的白天和黑夜。在2018年和2019年，我们为成年雄性猫头鹰(n = 18)配备了GPS远程下载发射器，并在整个繁殖季节(5月1日至9月15日)收集每小时的位置数据。使用50%和95%核密度估计值(KDE)，平均核心区面积为1.2 km2，平均家园范围大小为6.2 km2 (n = 16)。资源选择分析包括遥感和微型站点数据。我们采用分层随机抽样设计(n = 661)，在95%的KDE家庭范围内的使用点和可用点进行了微型现场调查。确定栖息地范围和繁殖栖息地的要求将改善密度估计，并促进对大灰猫头鹰及其栖息地的有效管理。我们发现在家域尺度和家域尺度内的生境选择模式不同。Flickr上YNP的特色照片。https://flic.kr/p/SA17KT

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Great Gray Owl home range and habitat selection during the breeding-season

Identifying resource requirements of under-studied species during key stages such as breeding is critical for effective management. We quantified breeding-season home-range attributes and habitat selection of adult Great Gray Owls across multiple spatial (home-range and within-home-range level) and temporal (nesting and post-fledging; day versus night) scales in western Wyoming, USA. In 2018 and 2019 we outfitted adult male owls (n = 18) with GPS remote-download transmitters and collected hourly location data throughout the breeding season (1 May – 15 September). Using 50% and 95% kernel density estimates (KDE), mean core area was 1.2 km2 and mean home-range size was 6.2 km2 (n = 16). Resource selection analyses incorporated both remotely-sensed and microsite data. We conducted microsite surveys at used and available points within 95% KDE home ranges using a stratified random sample design (n = 661). Determining home-range and breeding habitat requirements will improve density estimates and facilitate the effective management of Great Gray Owls and their habitat. We found differing patterns between habitat selection at the home-range and within-home-range scales. Featured photo by YNP on Flickr. https://flic.kr/p/SA17KT

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The UW National Parks Service Research Station Annual Reports

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