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1 December 2009 Habitat Occupancy and Detection of the Pacific Sheath-Tailed Bat (Emballonura semicaudata) on Aguiguan, Commonwealth of the Northern Mariana Islands
P. Marcos Gorresen, Frank J. Bonaccorso, Corinna A. Pinzari
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Abstract

Occupancy analysis was used to quantify Pacific sheath-tailed bat (Emballonura semicaudata) foraging activity and its relationship to forest structure and proximity to cave roosts on Aguiguan Island in the Commonwealth of the Northern Mariana Islands. Bat occurrence was most closely associated with canopy cover, vegetation stature and distance to known roosts. The metrics generated by this study can serve as a quantitative baseline for future assessments of the status of this endangered species following changes in habitat due to management activities (e.g., feral goat control) or other factors (e.g., typhoon impacts). Additionally, we provide quantitative descriptions of the echolocation calls of E. semicaudata. Search-phase calls were characterized by a relatively narrow bandwidth and short pulse duration typical of insectivores that forage within vegetative clutter. Two distinctly characteristic frequencies were recorded: 30.97 ± 1.08 kHz and 63.15 ± 2.20 kHz

© Museum and Institute of Zoology PAS
P. Marcos Gorresen, Frank J. Bonaccorso, and Corinna A. Pinzari "Habitat Occupancy and Detection of the Pacific Sheath-Tailed Bat (Emballonura semicaudata) on Aguiguan, Commonwealth of the Northern Mariana Islands," Acta Chiropterologica 11(2), 331-342, (1 December 2009). https://doi.org/10.3161/150811009X485567
Received: 9 April 2009; Accepted: 21 May 2009; Published: 1 December 2009
JOURNAL ARTICLE
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KEYWORDS
Anabat
bat detector
echolocation calls
Emballonuridae
endangered species
Mariana Islands
occupancy analysis
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