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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Variation in populational size and composition within two summer colonies of endangered gray bats (Myotis grisescens)

Redinger, Petra, Best, Troy L. January 2006 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references.
2

Identification of Pipistrellus abramus, Miniopterus schreibersii, Hipposideros tecasensis, and Rhinolophus monoceros using echolocation call charaters

Chao, Nien-Min 13 August 2001 (has links)
Most studies on bats in Taiwan concentrate in taxonomy, reproduction, activity patterns, and behaviors. However, researchers seldom focus to understand the patterns and functions of bat echolocation in Taiwan. Using a sophisticated Anabat II bat detector system, I was able to collect echolocation calls of bat species including Pipistrellus abramus, Miniopterus schreibersii, Rhinolophus monoceros, and Hipposideros terasensis in southern Taiwan. Between these four bat species, R. monoceros has the highest frequency and P. abramus has the lowest frequency of echolocation calls. The echolocation calls that used by P. abramus belong to FM/CF type, with the maximum frequency at 53.30¡Ó5.30¡]mean ¡ÓS.D.¡^kHz, the minimum frequency at 46.74¡Ó1.94 kHz, the duration time at 5.97¡Ó1.53 msec, the frequency range at 6.55¡Ó4.29 kHz, and the frequency change rate at 2.65¡Ó2.21 kHz/msec. The echolocation calls that used by M. schreibersii belong to FM/CF type, with the maximum frequency at 65.12¡Ó12.24 kHz, the minimum frequency at 49.71¡Ó1.48 kHz, the duration time at 3.62¡Ó2.06 msec, the frequency range at 15.42¡Ó11.79 kHz, and the frequency change rate at 9.52¡Ó7.95 kHz/msec. The echolocation calls that used by H. terasensis belong to CF/FM type, with the maximum frequency at 68.16¡Ó0.86 kHz, the minimum frequency at 61.50¡Ó8.72 kHz, the duration time at 11.27¡Ó4.88 msec, the frequency range at 6.66¡Ó8.87 kHz, and the frequency change rate at 4.67¡Ó3.19 kHz/msec. The echolocation calls that used by R. monoceros belong to FM/CF/FM type, with the maximum frequency at 112.55¡Ó1.65 kHz, the minimum frequency at 89.57¡Ó18.03 kHz, the duration time at 34.30¡Ó9.13 msec, the frequency range at 22.98¡Ó17.75 kHz, and the frequency change rate at 7.70¡Ó4.20 kHz/msec. R. monoceros¡]duty cycle 65 %¡^and H. terasensis ¡]duty cycle 39 %¡^are the high duty cycle bats. P. abramus¡]duty cycle 12 %¡^ and M. schreibersii¡]duty cycle 11 %¡^are the low duty cycle bats. High duty cycle bats have more stable maximum frequency of echolocation calls than low duty cycle bats. Low duty cycle bats have more stable minimum frequency of echolocation calls than that of high duty cycle bats. I compared the differences in echolocation calls emitted by these four bat species. I used the Dumcam¡¦s multiple-range test to confirm these echolocation calls have significant differences (p¡Õ0.05) in their maximum frequency, minimum frequency, frequency change rate, frequency range and duration of time. Similarly, I also used these five variables to run canonical discriminate analysis. The Mahalanobis distance¡¦s between pair of species varied from 12.01 (P. abramus A type and H. terasensis) to 197.80 (P. abramus A type and R. monoceros); all distances were statistically significant (p<0.01). These results confirm the fact that bats¡¦ echolocation calls can be used to clearly identify individual species, which is not only possible but also practicable. However, considering the possibilities of some habitat influence and geological/genetic difference, using echolocation for identification species should be done more cautiously.
3

Automated acoustic identification of nine bat species of the Eastern United States /

Corcoran, Aaron J. January 1900 (has links)
Thesis (M.A.)--Humboldt State University, 2007. / Includes bibliographical references (leaves 48-51). Also available via Humboldt Digital Scholar.
4

Spatial and predictive foraging models for gray bats in northwest Georgia and a comparison of two acoustical bat survey techniques

Johnson, Joshua B. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains viii, 64 p. : ill., maps. Includes abstract. Includes bibliographical references (p. 58-64).
5

Activity patterns of the Hawaiian hoary bat (Lasiurus cinereus semotus) in relation to reproductive time periods

Menard, Theresa. January 1900 (has links) (PDF)
Thesis (M.S.)--University of Hawaii, 2001. / Title from PDF title page (viewed on Feb. 26, 2004). "This electronic version was created for Web publication in Jan 2003 (Note: the pagination and some text/figure formatting differ slightly from original thesis)." Includes bibliographical references.
6

Analysis of stable isotopes of hydrogen to determine migrational source of silver-haired bats (Lasionycteris noctivagans) in Alabama

Hirt, Samuel James. Best, Troy L., January 2008 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2008. / Abstract. Includes bibliographical references (p. 14-18).
7

Aspects of microchiropteran reproduction in relation to flight performance

Hughes, Patricia Mary January 1990 (has links)
No description available.
8

Resource partitioning between two cryptic species of Pipistrellus

Barlow, Katherine Elisabeth January 1997 (has links)
No description available.
9

Bat Problem Management

Sullivan, Lawrence 02 1900 (has links)
5 pp. / Withdrawn 7/09
10

MATERNAL AGE CLASS DIFFERENCES IN THE PALLID BAT (ANTROZOUS PALLIDUS) AND THE TRIVERS-WILLARD SEX RATIO MODEL.

Sidner, Ronnie. January 1982 (has links)
No description available.

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