Biology ETDs

Publication Date

7-11-1979

Abstract

Comparative jaw and skull morphologies were analyzed in two closely related species of bats, Myotis volans (aerial insectivore) and Myotis evotis (foliage gleaner). Force vector analyses were performed on each muscle-bone lever system to determine the relative force produced at three designated functional points along the lower tooth row: the incisors, canine, and protoconid of the second molar. Results of the analysis indicate that Myotis evotis not only has a more powerful bite and grip than volans but it also has the potential for a much quicker jaw closure which is most effective at smaller angles of jaw opening. These results are interpreted in view of available ecological data concerning the foraging behavior of the two species.

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

Joe Scott Altenbach

Third Committee Member

Frederick W. Taylor

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