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Home range characteristics of Mexican Spotted Owls in the canyonlands of Utah

Journal of Raptor Research

By:
and
DOI: 10.3356/0892-1016(2007)41[10:HRCOMS]2.0.CO;2

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Abstract

We studied home-range characteristics of adult Mexican Spotted Owls (Strix occidentalis lucida) in southern Utah. Twenty-eight adult owls were radio-tracked using a ground-based telemetry system during 1991-95. Five males and eight females molted tail feathers and dropped transmitters within 4 wk. We estimated cumulative home ranges for 15 Spotted Owls (12 males, 3 females). The mean estimate of cumulative home-range size was not statistically different between the minimum convex polygon and adaptive kernel (AK) 95% isopleth. Both estimators yielded relatively high SD, and male and female range sizes varied widely. For 12 owls tracked during both the breeding and nonbreeding seasons, the mean size of the AK 95% nonbreeding home range was 49% larger than the breeding home-range size. The median AK 75% bome-range isopleth (272 ha) we observed was similar in size to Protected Activity Centers (PACs) recommended by a recovery team. Our results lend support to the PAC concept and we support continued use of PACs to conserve Spotted Owl habitat in Utah. ?? 2007 The Raptor Research Foundation, Inc.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Home range characteristics of Mexican Spotted Owls in the canyonlands of Utah
Series title:
Journal of Raptor Research
DOI:
10.3356/0892-1016(2007)41[10:HRCOMS]2.0.CO;2
Volume
41
Issue:
1
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Raptor Research
First page:
10
Last page:
15