Publication Date

1972

Document Type

Dissertation/Thesis

First Advisor

Brower, James E.||Southern, William E.||Zar, Jerrold H., 1941-

Degree Name

M.S. (Master of Science)

Department

Department of Biological Sciences

LCSH

Peromyscus leucopus||Animal populations||Aggressiveness

Abstract

The role of aggressive behavior in population regulation was investigated by establishing four populations of Peromyscus leucopus of known aggressive levels and determining their rate of population increase and the resulting spatial distribution patterns. Modified paired-encounter methods were utilized as reliable measures of aggressiveness. The presence of highly aggressive males in the populations was responsible for an increased number of attacks during social contacts as was indicated by the frequency of tail wounding. High aggression was also correlated with fewer young being born and a decrease in juvenile survival. Differences in the spatial distribution patterns among individuals in the two aggressive levels were observed; indicating an interaction between degree of aggressiveness and population dispersion. The type of dispersion pattern may influence the frequency of social contacts, thereby causing behavior changes in the subsequent generation. A feedback mechanism of behavioral regulation of population size was thus postulated.

Comments

Includes bibliographical references.||Includes illustrations.

Extent

53 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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