Biology ETDs

Publication Date

7-17-1972

Abstract

A model of echoranging in bats is presented incorporating the parameters: pulse frequency, intensity, atmospheric attenuation, gain of a directional beaming pattern, gain of the pinnae, and hearing resolution. The range equation is simulated by carrying the above parameters within reasonable biological limits. The optimal set of parameters is predicted which will maximize the range of a bat’s echolocating system. Spectral analysis of the audible sounds emitted by free flying bats of the species Tadarida macrotis shows that these clicks are longer and louder than has previously been reported for similar low frequency modulated indicates that they are being used for active echoranging. It is proposed that T. macrotis, and presumably other bats with similar observed behavior, use high intensity, low frequency clicks for active, long distance echoranging.

Language

English

Document Type

Thesis

Degree Name

Biology

Level of Degree

Masters

Department Name

UNM Biology Department

First Committee Member (Chair)

James Smith Findley

Second Committee Member

Illegible

Third Committee Member

Michael L. Rosenzweig

Fourth Committee Member

Illegible

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