Hawaiian hoary bat acoustic surveys on Marine Corps Base Hawaii, 2019-2021

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dc.contributor.authorPinzari, Corinna A.
dc.contributor.authorMontoya-Aiona, Kristina M.
dc.contributor.authorGross, Danielle N.
dc.contributor.authorCourtot, Karen N.
dc.date.accessioned2021-11-11T16:47:05Z
dc.date.available2021-11-11T16:47:05Z
dc.date.issued2021-11-11
dc.descriptionAdobe pdfen_US
dc.description.abstractThe endangered Hawaiian hoary bat (Lasiurus semotus, Vespertilionidae, also known as Aeorestes semotus and ‘ōpe‘ape‘a) occurs on all the principal volcanic islands in Hawai‘i. Advances in acoustic bat monitoring techniques have contributed to the body of knowledge of bat activity and behavior in many areas of the State of Hawai‘i; however, there is still much that is unknown about the population and seasonal distribution of Hawaiian hoary bats on O‘ahu. A two-year acoustic survey for presence of Hawaiian hoary bats was conducted at 17 stations across four Marine Corps Base Hawaii (MCBH) properties on O‘ahu to document distribution, seasonal patterns, and foraging activity. Bats were confirmed present at all properties; MCBH Kaneohe Bay on Mōkapu Peninsula, Marine Corps Training Area Bellows (MCTAB) in Waimanalo, Camp H M Smith in Halawa Heights, and Puuloa Range Training Facility (RTF) on the ‘Ewa coastal plain. Hawaiian hoary bats were recorded in airspace at all four properties during important periods of Hawaiian hoary bat life history, including periods of pregnancy, lactation, and pup fledging; however, overall presence was low. Foraging activity as identified from characteristic feeding buzzes was very rare and was recorded on only three nights over the entire study. Within-night bat detection pooled for all nights and stations at each property showed that bat activity was mostly confined to the first several hours of the night at MCBH Kaneohe Bay and Puuloa RTF, whereas bat activity was spread throughout the night at Camp H M Smith and MCTAB. Overall, detection frequency was low (year 1 = 0.009, year 2 = 0.007, average = 0.008) at the study sites on O‘ahu compared to results from acoustic monitoring studies on the islands of Maui and Hawai‘i. However, the low rate of bat presence on MCBH properties is consistent with recent studies at other locations on the Island of O‘ahu. Monitoring the seasonal presence and distribution of Hawaiian hoary bats on MCBH facilities, especially at forest and wetland habitats, could contribute to the broader scientific understanding of island-wide distribution and behavior on O‘ahu, which is essential for species recovery planning and implementation of best management practices.en_US
dc.format.extent33 pagesen_US
dc.identifier.urihttp://hdl.handle.net/10790/6798
dc.language.isoen-USen_US
dc.relation.ispartofseriesHCSU Technical Report Series;100
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
dc.subjectHawaiian hoary baten_US
dc.subject‘ōpe‘ape‘aen_US
dc.subjectHawaii--Oahuen_US
dc.subjectacoustic monitoringen_US
dc.titleHawaiian hoary bat acoustic surveys on Marine Corps Base Hawaii, 2019-2021en_US
dc.typeTechnical Reporten_US
dc.type.dcmiTexten_US

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