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Factors Affecting the Size of Ferruginous Hawk Home Ranges
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Factors Affecting the Size of Ferruginous Hawk Home Ranges

著者: Alan W Leary; Rosemary Mazaika; Marc J Bechard
版本/格式: 文章 文章 : 英语
刊登在:The Wilson Bulletin, Jun., 1998, vol. 110, no. 2, p. 198-205
数据库:JSTOR
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文件类型: 文章
所有的著者/提供者: Alan W Leary; Rosemary Mazaika; Marc J Bechard
ISSN:0043-5643
OCLC号码: 481887321
语言注释: English
注意: FIG. 2. Comparison of 95% minimum convex polygon mean home range estimates from this study with those previously reported in the literature for Ferruginous Hawks.
FIG. 3. Locations and home range estimates (95% MCP and 85% adaptive kernel with 0.7 smoothing parameter) for the WPPSS #1 male. This home range, with its two core areas, is representative of the home ranges of all males who nested on the Hanford Site and hunted in the agricultural fields that surround the site.
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We used radio-telemetry to track movements of seven adult male Ferruginous Hawks (Buteo regalis) in southcentral Washington. Home range size was estimated for each male using minimum convex polygon, harmonic mean, adaptive kernel, and fixed kernel-based methods. Minimum convex polygon and harmonic mean home ranges were significantly larger than those previously reported for Ferruginous Hawks. Home ranges varied substantially among males (mean = 90.3 km<sup>2</sup>, range = 17.7-136.4 km<sup>2</sup>). There was no relationship between home range size and brood size; however, there was a significant relationship (r<sup>2</sup> = 0.964, P = 0.018) between home range size and the distance from the nest site to the nearest irrigated agricultural field where some males hunted. Kernel-based estimates showed two distinct core areas for most males, one around the nest and a second in the agricultural fields where they hunted.

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