Spatial use and habitat selection of Golden Eagles in Southwestern Idaho
Spatial use and habitat selection of Golden Eagles in Southwestern Idaho
复制标题
DOI：
10.2307/4089287
复制
发表时间：
1997-10-01
期刊：
影响因子：
2.8
通讯作者：
Zarriello, TJ
中科院分区：
文献类型：
--
作者：
Marzluff, JM;Knick, ST;Zarriello, TJ
1992年至1994年，我们测量了蛇河猛禽国家保护区的空间使用和栖息地选择的无线电标记的金雕（Aquila chrysaetos），每年在8至9个领土。空间的使用没有不同年份或性别，但不同季节（家庭范围和旅行距离较大的非繁殖期比繁殖期）和个体之间。家域很大，繁殖季节期间为190至8，330公顷，繁殖季节以外为1，370至170，000公顷，但活动集中在繁殖和非繁殖季节期间分别为30至1，535公顷和485至6，380公顷的小核心区域。鹰选择灌木栖息地，避免干扰地区，草地和农业。这导致了对栖息地的选择可能包含他们的主要猎物，黑尾长耳大野兔（Lepus californicus）。在广泛的灌木丛（n = 3）的家庭范围的个人没有选择灌木在其核心区域或觅食点的位置，但个人在高度分散或分散的灌木丛（n = 5）集中他们的活动和觅食优先在长耳野兔栖息地（即丰富和大型灌木斑块的地区）。由于繁殖季节以外的家庭范围扩大，个人选择长耳野兔栖息地在他们的范围内。应尽量减少灌木丛的破碎化，使剩余的灌木丛斑块足够大，以支持长耳大野兔。
We measured spatial use and habitat selection of radio-tagged Golden Eagles (Aquila chrysaetos) at eight to nine territories each year from 1992 to 1994 in the Snake River Birds of Prey National Conservation Area. Use of space did not vary between years or sexes, but did vary among seasons (home ranges and travel distances were larger during the nonbreeding than during the breeding season) and among individuals. Home ranges were large, ranging from 190 to 8,330 ha during the breeding season and from 1,370 to 170,000 ha outside of the breeding season, but activity was concentrated in small core areas of 30 to 1,535 ha and 485 to 6,380 ha during the breeding and nonbreeding seasons, respectively. Eagles selected shrub habitats and avoided disturbed areas, grasslands, and agriculture. This resulted in selection for habitat likely to contain their principal prey, black-tailed jackrabbits (Lepus californicus). Individuals with home ranges in extensive shrubland (n = 3) did not select for shrubs in the placement of their core areas or foraging points, but individuals in highly fragmented or dispersed shrublands (n = 5) concentrated their activities and foraged preferentially in jackrabbit habitats (i.e. areas with abundant and large shrub patches). As home ranges expanded outside of the breeding season, individuals selected jackrabbit habitats within their range. Shrubland fragmentation should be minimized so that remaining shrub patches are large enough to support jackrabbits.