College of Graduate Studies: Theses & Dissertations (1964–2006)

Term of Award

Spring 1994

Degree Name

Master of Science in Biology

Document Type and Release Option

Thesis (open access)

Department

Department of Biology

Committee Chair

Michael P. Moulton

Committee Member 1

D. Kelly McLain

Committee Member 2

John W. Parrish

Abstract

Patterns of plumage dimorphism were examined among species of passerines native to 19 West Indian islands. Based on sexual selection theory, the predictions were made that dimorphic species: (1) occur on fewer and larger islands than monomorphic species due to reduced colonization ability and reduced survivorship imposed by sexual selection pressure, and (2) should be added to island communities disproportionately as area increases, an idea which was tested using linear models.

No significant difference was observed between number of islands or minimum island area occupied by dimorphics versus monomorphics. The traditional ANCOVA model best fits the data and suggests that dimorphics do not add a disproportionate number of species as island area increases.

I suggest that the force of sexual selection is not an important force in the structuring of these West Indian bird communities.

OCLC Number

1031373328

Copyright

This work is archived and distributed under the repository’s modified copyright and reuse license for Theses and Dissertations authored 2005 or prior (opens in new tab). Under this license, end-users may read, copy, and store this work without restriction. For questions related to additional reuse of this work, including distribution and creation of derivative works, please contact the copyright owner. Copyright owners who wish to review or revise the terms of this license, please contact [email protected].

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