Document Type

Honors Capstone Project

Date of Submission

Spring 5-1-2008

Capstone Advisor

Dr. R. Craig Albertson

Honors Reader

Dr. Larry Wolf

Capstone Major

Biology

Capstone College

Arts and Science

Audio/Visual Component

no

Capstone Prize Winner

no

Won Capstone Funding

no

Honors Categories

Sciences and Engineering

Subject Categories

Biology

Abstract

Cichlid fish exhibit a high frequency of variation across species. This study focused on a particular asymmetry in the jaws of fish in the genus Tropheops. An asymmetry towards the left side was observed and then tested. Each side of the jaw was measured in a number of individuals from different Tropheops species. These measurements were then analyzed to see if the left side was indeed longer than the right. Statistical analysis was utilized to test the significance of sided differences. It was found that Tropheops species exhibit a left sided bias, some species having a significant bias, and others showing a leftward trend. Two other species, Labeotropheus fuelleborni and Cyanotilapia afra, were tested for comparison to see if this leftward trend is specific to Tropheops species. These species did not have a significant bias, but did show a trend toward a longer left side. It is predicted that the pronounced asymmetry in Tropheop jaw morphology is reflective of methods of food collection and diet.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

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Biology Commons

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