Selection of roost sites by the lesser long-eared bat (Nyctophilus geoffroyi) and Gould`s wattled bat (Chalinolobus gouldii) in south-eastern Australia

Lumsden, Linda F., Bennett, Andrew and Silins, John E. 2002, Selection of roost sites by the lesser long-eared bat (Nyctophilus geoffroyi) and Gould`s wattled bat (Chalinolobus gouldii) in south-eastern Australia, Journal of zoology, vol. 257, no. 2, pp. 207-218, doi: 10.1017/S095283690200081X.

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Title Selection of roost sites by the lesser long-eared bat (Nyctophilus geoffroyi) and Gould`s wattled bat (Chalinolobus gouldii) in south-eastern Australia
Author(s) Lumsden, Linda F.
Bennett, Andrew
Silins, John E.
Journal name Journal of zoology
Volume number 257
Issue number 2
Start page 207
End page 218
Publisher Zoological Society of London
Place of publication London, England
Publication date 2002-02
ISSN 0952-8369
Keyword(s) chalinolobus gouldii
nyctophilus geoffroyi
roost selection
tree cavities
Summary Physical characteristics of roost sites used by the lesser long-eared bat Nyctophilus geoffroyi and Gould's wattled bat Chalinolobus gouldii were investigated in a farmland–remnant vegetation mosaic and adjacent forested floodplain in south-eastern Australia. A total of 45 individuals of N. geoffroyi and 27 C. gouldii were fitted with radio-transmitters, resulting in the location of 139 and 89 roosts, respectively. Male N. geoffroyi roosted in trees, fallen and decayed timber and artificial structures. These roosts were low to the ground, mainly under bark and in cracks in timber. Roosts of female N. geoffroyi were located higher above ground, and all within trees. Maternity roosts were predominantly located in large dead trees, approximately twice the diameter of roost trees used by females outside the breeding season. No maternity roosts were found under bark, despite half the roosts used by non-breeding females being located in these situations. Both sexes roosted primarily in dead timber and used cavities where the narrowest dimension of the entrance was 2.5 cm. Most roosts of C. gouldii were in dead spouts on large, live river red gum Eucalyptus camaldulensis trees. Intraspecific differences in roost characteristics were less pronounced for this species. Despite access to the same roosting opportunities, there were marked differences in roost selection between N. geoffroyi and C. gouldii. Both species favoured large diameter trees, but differed significantly for all other measured variables: type of roost structure, condition of roost tree (live or dead), height of roost tree, height of roost, and entrance dimensions. Although these species are among the most widespread bats in Australia and are often considered to be habitat 'generalists', both displayed a high level of discrimination in the roosts used. Clearly, roosting requirements are a complex and important issue in the conservation of even the most common species of bats.
Language eng
DOI 10.1017/S095283690200081X
Field of Research 060208 Terrestrial Ecology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, The Zoological Society of London
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