Status and natural history of Emballonura semicaudata rotensis on Aguiguan, Mariana Islands

• Autorzy: Wiles G.J. , O'Shea T. J. , Worthington D. J. , Esselstyn J. A. , Valdez E. W.
• Języki publikacji: EN

Abstrakty

EN

Pacific sheath-tailed bats (Emballonura semicaudata rotensis) in the Mariana Islands declined greatly in abundance and distribution during the 20th century. The small island of Aguiguan now supports the only persisting population. We studied abundance and natural history of this population from 1995-2008. There was a likely population increase during the study, with 359-466 (minimum and maximum) bats counted at caves in 2008. Bats roosted only in caves, primarily those of relatively larger size. Bats were detected in only seven of 95 caves; three caves were always occupied when surveyed. One cave consistently had the largest colony (x̅ ± SD = 333 ± 33.6 in 2008). Others held 1-64 bats. Cave environments showed no complexities in temperature or humidity. Preliminary observations indicate a litter size of one and the possibility of birthing timed to coincide with the transitional period leading into the rainy season (June-July). We review potential threats to E. s. rotensis on Aguiguan and make suggestions for conservation.

• Wydawca: -
• Czasopismo: Acta Chiropterologica
• Rocznik: 2011
• Tom: 13
• Numer: 2
• Opis fizyczny: p.299-309,fig.,ref.

Twórcy

autor

Wiles G.J.

• Division of Aquatic and Wildlife Resources, 192 Dairy Road, Mangilao, Guam 96913, USA
• Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington 98501-1091, USA

autor

O'Shea T. J.

• United States Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, Colorado, 80526-8118,USA

autor

Worthington D. J.

• Division of Fish and Wildlife, P.O. Box 1397, Rota, Commonwealth of the Northern Mariana Islands 96951, USA
• Capitol Reef National Park, Torrey, Utah 84775, USA

autor

Esselstyn J. A.

• Division of Fish and Wildlife, P.O. Box 1397, Rota, Commonwealth of the Northern Mariana Islands 96951, USA
• Biology Department, Life Sciences Building, Room 428, McMaster University, Hamilton, Ontario L8S4K1, Canada

autor

Valdez E. W.

• United States Geological Survey, Fort Collins Science Center, Department of Biology, MSC03 2020, 1 University of New Mexico, Albuquerque, New Mexico 87131-0001, USA

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