Award Date

1-1-2006

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Biological Science

First Committee Member

Brett Riddle

Number of Pages

51

Abstract

In recent years, two populations of the rare Relict Leopard Frog (Rana onca) have gone extinct. These population extinctions occurred concomitantly with the encroachment of native emergent vegetation into pools in which frogs were usually observed. In order to determine if adult Rana onca prefer more vegetatively open habitats, a radio-telemetry study was conducted. A total of 809 radio telemetry observations were made on 34 frogs from April 2 through December 7, 2004. Binary Logistic Regression was used with both macrohabitat and microhabitat data to compare habitat characteristics between low-use and high-use segments of the spring. A more traditional multiple analysis of variance (MANOVA) approach was also used at the macrohabitat scale to compare used segments to non-used segments. Both of these analyses supported the hypothesis that adult Rana onca select for areas with less vegetative cover.

Keywords

Assessment; Frog; Habitat; Leopard; Onca; Rana; Relict; Scales; Selection; Vegetation

Controlled Subject

Ecology

File Format

pdf

File Size

1812.48 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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